/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-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:22:05,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:22:05,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:22:05,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 02:22:05,310 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 [2021-04-15 02:22:05,342 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:22:05,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:22:05,342 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:22:05,342 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:22:05,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:22:05,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:22:05,346 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:22:05,346 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:22:05,346 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:22:05,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:22:05,347 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:22:05,347 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:22:05,347 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:22:05,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:22:05,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:22:05,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:22:05,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:22:05,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:22:05,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:22:05,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:22:05,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:22:05,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:22:05,349 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:22:05,349 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:22:05,349 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:22:05,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:22:05,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:22:05,666 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:22:05,667 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:22:05,668 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:22:05,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-04-15 02:22:05,669 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-04-15 02:22:05,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:22:05,712 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:22:05,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:22:05,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:22:05,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:22:05,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:22:05,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:22:05,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:22:05,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:22:05,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/1) ... [2021-04-15 02:22:05,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:22:05,758 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:22:05,758 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:22:05,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:22:05,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (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 [2021-04-15 02:22:05,825 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:22:05,826 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:22:05,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:22:05,826 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:22:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:22:05,827 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:22:05,827 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:22:05,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:22:05,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:22:05,828 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:22:06,162 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:22:06,163 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-04-15 02:22:06,163 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-04-15 02:22:06,164 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-04-15 02:22:06,165 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:22:06 BoogieIcfgContainer [2021-04-15 02:22:06,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:22:06,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:22:06,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:22:06,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:22:06,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:22:05" (1/2) ... [2021-04-15 02:22:06,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ee0b7cf and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:22:06, skipping insertion in model container [2021-04-15 02:22:06,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:22:06" (2/2) ... [2021-04-15 02:22:06,174 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-04-15 02:22:06,181 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:22:06,181 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:22:06,184 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:22:06,184 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:22:06,248 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:22:06,263 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:22:06,291 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:22:06,292 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:22:06,292 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:22:06,292 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:22:06,292 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:22:06,292 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:22:06,292 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:22:06,292 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:22:06,301 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-04-15 02:22:06,310 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) [2021-04-15 02:22:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) [2021-04-15 02:22:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-04-15 02:22:06,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:06,317 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:06,318 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash -525039273, now seen corresponding path program 1 times [2021-04-15 02:22:06,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:06,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858368969] [2021-04-15 02:22:06,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858368969] [2021-04-15 02:22:06,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:22:06,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 02:22:06,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626921545] [2021-04-15 02:22:06,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:22:06,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:22:06,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:22:06,477 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:06,500 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-04-15 02:22:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:22:06,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-04-15 02:22:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:06,513 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:22:06,513 INFO L226 Difference]: Without dead ends: 19 [2021-04-15 02:22:06,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:22:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-04-15 02:22:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-04-15 02:22:06,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 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) [2021-04-15 02:22:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-04-15 02:22:06,538 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-04-15 02:22:06,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:06,539 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-04-15 02:22:06,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:06,539 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-04-15 02:22:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:22:06,539 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:06,540 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:06,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:22:06,540 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1892497481, now seen corresponding path program 1 times [2021-04-15 02:22:06,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:06,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145482337] [2021-04-15 02:22:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145482337] [2021-04-15 02:22:06,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072735313] [2021-04-15 02:22:06,573 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 [2021-04-15 02:22:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 02:22:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:06,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-04-15 02:22:06,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820065941] [2021-04-15 02:22:06,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 02:22:06,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:06,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 02:22:06,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:22:06,682 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-04-15 02:22:06,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:06,714 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-04-15 02:22:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:22:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 10 [2021-04-15 02:22:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:06,716 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:22:06,716 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:22:06,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:22:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:22:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-04-15 02:22:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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) [2021-04-15 02:22:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-04-15 02:22:06,721 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-04-15 02:22:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:06,721 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-04-15 02:22:06,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-04-15 02:22:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-04-15 02:22:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:22:06,722 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:06,722 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:06,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 02:22:06,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:06,938 INFO L82 PathProgramCache]: Analyzing trace with hash 904379190, now seen corresponding path program 1 times [2021-04-15 02:22:06,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:06,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765403744] [2021-04-15 02:22:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:06,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765403744] [2021-04-15 02:22:06,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:22:06,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:22:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448561762] [2021-04-15 02:22:06,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:22:06,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:22:06,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:22:06,979 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-04-15 02:22:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,012 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-04-15 02:22:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:22:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-04-15 02:22:07,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,018 INFO L225 Difference]: With dead ends: 22 [2021-04-15 02:22:07,018 INFO L226 Difference]: Without dead ends: 18 [2021-04-15 02:22:07,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 02:22:07,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-04-15 02:22:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-04-15 02:22:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2021-04-15 02:22:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-04-15 02:22:07,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-04-15 02:22:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,028 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-04-15 02:22:07,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-04-15 02:22:07,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-04-15 02:22:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-04-15 02:22:07,028 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,028 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:22:07,029 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash -974494568, now seen corresponding path program 2 times [2021-04-15 02:22:07,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433456198] [2021-04-15 02:22:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:07,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433456198] [2021-04-15 02:22:07,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:22:07,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:22:07,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280960352] [2021-04-15 02:22:07,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:22:07,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:07,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:22:07,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:22:07,073 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-04-15 02:22:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,092 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-04-15 02:22:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:22:07,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-04-15 02:22:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,094 INFO L225 Difference]: With dead ends: 20 [2021-04-15 02:22:07,094 INFO L226 Difference]: Without dead ends: 20 [2021-04-15 02:22:07,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:22:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-04-15 02:22:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-04-15 02:22:07,101 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) [2021-04-15 02:22:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-04-15 02:22:07,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-04-15 02:22:07,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,102 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-04-15 02:22:07,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-04-15 02:22:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-04-15 02:22:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 02:22:07,103 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,103 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:22:07,103 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1462847702, now seen corresponding path program 1 times [2021-04-15 02:22:07,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728562975] [2021-04-15 02:22:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728562975] [2021-04-15 02:22:07,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950065206] [2021-04-15 02:22:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-04-15 02:22:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-04-15 02:22:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:07,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 02:22:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679886253] [2021-04-15 02:22:07,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 02:22:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 02:22:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:22:07,299 INFO L87 Difference]: Start difference. First operand 20 states and 35 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) [2021-04-15 02:22:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,310 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-04-15 02:22:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 02:22:07,311 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 [2021-04-15 02:22:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,311 INFO L225 Difference]: With dead ends: 24 [2021-04-15 02:22:07,311 INFO L226 Difference]: Without dead ends: 24 [2021-04-15 02:22:07,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 02:22:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-04-15 02:22:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-04-15 02:22:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-04-15 02:22:07,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-04-15 02:22:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,315 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-04-15 02:22:07,315 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) [2021-04-15 02:22:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-04-15 02:22:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-04-15 02:22:07,315 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,315 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:07,533 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1595502390, now seen corresponding path program 2 times [2021-04-15 02:22:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070615045] [2021-04-15 02:22:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070615045] [2021-04-15 02:22:07,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910157691] [2021-04-15 02:22:07,572 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:07,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:07,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:07,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 02:22:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:07,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 02:22:07,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341778093] [2021-04-15 02:22:07,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:22:07,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:22:07,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:22:07,637 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:07,657 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-04-15 02:22:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 02:22:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:22:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:07,658 INFO L225 Difference]: With dead ends: 28 [2021-04-15 02:22:07,658 INFO L226 Difference]: Without dead ends: 28 [2021-04-15 02:22:07,658 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:22:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-04-15 02:22:07,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-04-15 02:22:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-04-15 02:22:07,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-04-15 02:22:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:07,662 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-04-15 02:22:07,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:07,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-04-15 02:22:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-04-15 02:22:07,662 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:07,662 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:07,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:07,884 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:07,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:07,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1412830422, now seen corresponding path program 3 times [2021-04-15 02:22:07,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:07,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274128467] [2021-04-15 02:22:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274128467] [2021-04-15 02:22:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020581002] [2021-04-15 02:22:07,945 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 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 [2021-04-15 02:22:07,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:22:07,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:07,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 02:22:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:08,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:08,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-04-15 02:22:08,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133828572] [2021-04-15 02:22:08,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:08,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:08,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:08,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:08,048 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-04-15 02:22:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:08,091 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-04-15 02:22:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:22:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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 [2021-04-15 02:22:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:08,092 INFO L225 Difference]: With dead ends: 32 [2021-04-15 02:22:08,092 INFO L226 Difference]: Without dead ends: 32 [2021-04-15 02:22:08,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-04-15 02:22:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-04-15 02:22:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-04-15 02:22:08,096 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-04-15 02:22:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:08,097 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-04-15 02:22:08,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-04-15 02:22:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-04-15 02:22:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:22:08,097 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:08,097 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:08,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,319 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:08,319 INFO L82 PathProgramCache]: Analyzing trace with hash 44966710, now seen corresponding path program 4 times [2021-04-15 02:22:08,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:08,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651863849] [2021-04-15 02:22:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:08,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:08,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651863849] [2021-04-15 02:22:08,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387053634] [2021-04-15 02:22:08,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:22:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:08,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:08,551 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 [2021-04-15 02:22:08,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:08,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:08,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:08,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:22:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:08,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:08,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 02:22:08,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754851057] [2021-04-15 02:22:08,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:08,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:08,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:08,604 INFO L87 Difference]: Start difference. First operand 32 states and 59 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) [2021-04-15 02:22:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:08,685 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-04-15 02:22:08,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:08,686 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 14 [2021-04-15 02:22:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:08,687 INFO L225 Difference]: With dead ends: 80 [2021-04-15 02:22:08,687 INFO L226 Difference]: Without dead ends: 77 [2021-04-15 02:22:08,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-04-15 02:22:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-04-15 02:22:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2021-04-15 02:22:08,692 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2021-04-15 02:22:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:08,692 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2021-04-15 02:22:08,692 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) [2021-04-15 02:22:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2021-04-15 02:22:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:22:08,693 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:08,693 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:08,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:08,909 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1649963104, now seen corresponding path program 5 times [2021-04-15 02:22:08,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:08,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144666198] [2021-04-15 02:22:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:08,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144666198] [2021-04-15 02:22:08,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108560430] [2021-04-15 02:22:08,967 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 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 [2021-04-15 02:22:08,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:22:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:22:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:09,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:09,105 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 [2021-04-15 02:22:09,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:09,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:09,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:09,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:22:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:09,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:09,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 02:22:09,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651751740] [2021-04-15 02:22:09,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:09,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:09,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:09,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:09,159 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:09,238 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-04-15 02:22:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:09,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:22:09,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:09,240 INFO L225 Difference]: With dead ends: 89 [2021-04-15 02:22:09,240 INFO L226 Difference]: Without dead ends: 86 [2021-04-15 02:22:09,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-04-15 02:22:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-04-15 02:22:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2021-04-15 02:22:09,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2021-04-15 02:22:09,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:09,246 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2021-04-15 02:22:09,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,246 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2021-04-15 02:22:09,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:22:09,247 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:09,247 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:09,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:09,457 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2019211880, now seen corresponding path program 6 times [2021-04-15 02:22:09,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:09,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960718129] [2021-04-15 02:22:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:09,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960718129] [2021-04-15 02:22:09,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126178169] [2021-04-15 02:22:09,494 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 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 [2021-04-15 02:22:09,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:22:09,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:09,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:22:09,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:09,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:09,645 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 [2021-04-15 02:22:09,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:09,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:09,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:09,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:22:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:09,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:09,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 02:22:09,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772756885] [2021-04-15 02:22:09,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:09,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:09,740 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:09,821 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2021-04-15 02:22:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:22:09,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:09,823 INFO L225 Difference]: With dead ends: 98 [2021-04-15 02:22:09,823 INFO L226 Difference]: Without dead ends: 95 [2021-04-15 02:22:09,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-04-15 02:22:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-04-15 02:22:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-04-15 02:22:09,837 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2021-04-15 02:22:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:09,837 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-04-15 02:22:09,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-04-15 02:22:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:22:09,838 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:09,838 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:10,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 02:22:10,038 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash 200480608, now seen corresponding path program 7 times [2021-04-15 02:22:10,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:10,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660179404] [2021-04-15 02:22:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:10,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660179404] [2021-04-15 02:22:10,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914321800] [2021-04-15 02:22:10,084 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 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 [2021-04-15 02:22:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:22:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:10,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:10,225 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 [2021-04-15 02:22:10,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:10,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:10,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:10,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:22:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:10,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:10,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 02:22:10,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702309845] [2021-04-15 02:22:10,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:10,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:10,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:10,293 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:10,358 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-04-15 02:22:10,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:10,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:22:10,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:10,360 INFO L225 Difference]: With dead ends: 108 [2021-04-15 02:22:10,360 INFO L226 Difference]: Without dead ends: 105 [2021-04-15 02:22:10,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-04-15 02:22:10,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-04-15 02:22:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2021-04-15 02:22:10,375 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2021-04-15 02:22:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:10,376 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2021-04-15 02:22:10,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2021-04-15 02:22:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-04-15 02:22:10,378 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:10,378 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:10,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 02:22:10,593 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:10,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:10,593 INFO L82 PathProgramCache]: Analyzing trace with hash 291471000, now seen corresponding path program 8 times [2021-04-15 02:22:10,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:10,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846164039] [2021-04-15 02:22:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:10,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846164039] [2021-04-15 02:22:10,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099645215] [2021-04-15 02:22:10,647 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 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 [2021-04-15 02:22:10,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:10,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:22:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:10,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:10,768 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 [2021-04-15 02:22:10,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:10,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:10,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:10,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-04-15 02:22:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:10,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:10,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-04-15 02:22:10,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506619712] [2021-04-15 02:22:10,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:10,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:10,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:10,825 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:10,897 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2021-04-15 02:22:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-04-15 02:22:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:10,898 INFO L225 Difference]: With dead ends: 119 [2021-04-15 02:22:10,899 INFO L226 Difference]: Without dead ends: 116 [2021-04-15 02:22:10,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-04-15 02:22:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-04-15 02:22:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2021-04-15 02:22:10,909 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2021-04-15 02:22:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2021-04-15 02:22:10,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2021-04-15 02:22:10,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:10,913 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:10,913 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:11,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 02:22:11,117 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash 590864598, now seen corresponding path program 9 times [2021-04-15 02:22:11,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:11,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595161780] [2021-04-15 02:22:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595161780] [2021-04-15 02:22:11,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893741211] [2021-04-15 02:22:11,168 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 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 [2021-04-15 02:22:11,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:22:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:11,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:11,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749425318] [2021-04-15 02:22:11,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:11,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:11,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:11,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:11,250 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:11,351 INFO L93 Difference]: Finished difference Result 141 states and 295 transitions. [2021-04-15 02:22:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:22:11,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:11,353 INFO L225 Difference]: With dead ends: 141 [2021-04-15 02:22:11,353 INFO L226 Difference]: Without dead ends: 141 [2021-04-15 02:22:11,354 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-04-15 02:22:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2021-04-15 02:22:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 80 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 219 transitions. [2021-04-15 02:22:11,357 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 219 transitions. Word has length 15 [2021-04-15 02:22:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:11,357 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 219 transitions. [2021-04-15 02:22:11,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 219 transitions. [2021-04-15 02:22:11,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:11,358 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:11,358 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:11,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:11,569 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:11,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:11,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1394695479, now seen corresponding path program 10 times [2021-04-15 02:22:11,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:11,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98250648] [2021-04-15 02:22:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98250648] [2021-04-15 02:22:11,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591427597] [2021-04-15 02:22:11,632 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) [2021-04-15 02:22:11,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:11,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:11,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:11,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:11,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:11,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:11,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535538387] [2021-04-15 02:22:11,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:11,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:11,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:11,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:11,715 INFO L87 Difference]: Start difference. First operand 81 states and 219 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:11,851 INFO L93 Difference]: Finished difference Result 161 states and 349 transitions. [2021-04-15 02:22:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:22:11,853 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:11,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:11,854 INFO L225 Difference]: With dead ends: 161 [2021-04-15 02:22:11,854 INFO L226 Difference]: Without dead ends: 156 [2021-04-15 02:22:11,854 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:11,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-04-15 02:22:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-04-15 02:22:11,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2021-04-15 02:22:11,861 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2021-04-15 02:22:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:11,861 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2021-04-15 02:22:11,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2021-04-15 02:22:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:11,862 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:11,862 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:12,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-04-15 02:22:12,074 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash -359013994, now seen corresponding path program 11 times [2021-04-15 02:22:12,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:12,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478927010] [2021-04-15 02:22:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478927010] [2021-04-15 02:22:12,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874274335] [2021-04-15 02:22:12,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:12,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:22:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:12,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:12,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306215767] [2021-04-15 02:22:12,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:12,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:12,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:12,199 INFO L87 Difference]: Start difference. First operand 98 states and 265 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) [2021-04-15 02:22:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:12,288 INFO L93 Difference]: Finished difference Result 121 states and 296 transitions. [2021-04-15 02:22:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:12,290 INFO L225 Difference]: With dead ends: 121 [2021-04-15 02:22:12,290 INFO L226 Difference]: Without dead ends: 120 [2021-04-15 02:22:12,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-04-15 02:22:12,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-04-15 02:22:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-04-15 02:22:12,292 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-04-15 02:22:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:12,292 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-04-15 02:22:12,292 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) [2021-04-15 02:22:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-04-15 02:22:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:12,293 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:12,293 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:12,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:12,513 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash 563404739, now seen corresponding path program 12 times [2021-04-15 02:22:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:12,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165803117] [2021-04-15 02:22:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165803117] [2021-04-15 02:22:12,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317265666] [2021-04-15 02:22:12,564 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 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 [2021-04-15 02:22:12,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:22:12,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:12,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:12,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672151884] [2021-04-15 02:22:12,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:12,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:12,659 INFO L87 Difference]: Start difference. First operand 99 states and 265 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) [2021-04-15 02:22:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:12,703 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-04-15 02:22:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:22:12,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:12,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:12,706 INFO L225 Difference]: With dead ends: 166 [2021-04-15 02:22:12,706 INFO L226 Difference]: Without dead ends: 166 [2021-04-15 02:22:12,707 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:12,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-04-15 02:22:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2021-04-15 02:22:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-04-15 02:22:12,713 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-04-15 02:22:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:12,714 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-04-15 02:22:12,714 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) [2021-04-15 02:22:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-04-15 02:22:12,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:12,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:12,714 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:12,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-04-15 02:22:12,936 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:12,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1473313992, now seen corresponding path program 13 times [2021-04-15 02:22:12,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:12,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325591426] [2021-04-15 02:22:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325591426] [2021-04-15 02:22:12,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766699733] [2021-04-15 02:22:12,982 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:13,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:13,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:13,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:13,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904304563] [2021-04-15 02:22:13,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:13,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:13,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:13,056 INFO L87 Difference]: Start difference. First operand 99 states and 265 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) [2021-04-15 02:22:13,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:13,109 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-04-15 02:22:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:22:13,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:13,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:13,110 INFO L225 Difference]: With dead ends: 169 [2021-04-15 02:22:13,110 INFO L226 Difference]: Without dead ends: 169 [2021-04-15 02:22:13,111 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-04-15 02:22:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2021-04-15 02:22:13,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.70873786407767) internal successors, (279), 103 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 279 transitions. [2021-04-15 02:22:13,115 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 279 transitions. Word has length 15 [2021-04-15 02:22:13,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:13,116 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 279 transitions. [2021-04-15 02:22:13,116 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) [2021-04-15 02:22:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 279 transitions. [2021-04-15 02:22:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:13,116 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:13,116 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:13,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:13,339 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:13,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash -390023859, now seen corresponding path program 14 times [2021-04-15 02:22:13,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:13,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917008113] [2021-04-15 02:22:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917008113] [2021-04-15 02:22:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842736830] [2021-04-15 02:22:13,377 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:13,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:13,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:13,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:13,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045794120] [2021-04-15 02:22:13,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:13,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:13,429 INFO L87 Difference]: Start difference. First operand 104 states and 279 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) [2021-04-15 02:22:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:13,516 INFO L93 Difference]: Finished difference Result 177 states and 389 transitions. [2021-04-15 02:22:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:13,518 INFO L225 Difference]: With dead ends: 177 [2021-04-15 02:22:13,518 INFO L226 Difference]: Without dead ends: 175 [2021-04-15 02:22:13,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-04-15 02:22:13,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 110. [2021-04-15 02:22:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.761467889908257) internal successors, (301), 109 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 301 transitions. [2021-04-15 02:22:13,522 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 301 transitions. Word has length 15 [2021-04-15 02:22:13,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:13,523 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 301 transitions. [2021-04-15 02:22:13,523 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) [2021-04-15 02:22:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 301 transitions. [2021-04-15 02:22:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:13,524 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:13,524 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:13,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 02:22:13,745 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:13,746 INFO L82 PathProgramCache]: Analyzing trace with hash 266778318, now seen corresponding path program 15 times [2021-04-15 02:22:13,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:13,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201367758] [2021-04-15 02:22:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201367758] [2021-04-15 02:22:13,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522316944] [2021-04-15 02:22:13,800 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 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 [2021-04-15 02:22:13,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:22:13,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:13,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:13,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:13,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:13,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228845473] [2021-04-15 02:22:13,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:13,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:13,873 INFO L87 Difference]: Start difference. First operand 110 states and 301 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) [2021-04-15 02:22:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:13,958 INFO L93 Difference]: Finished difference Result 167 states and 373 transitions. [2021-04-15 02:22:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:13,959 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:13,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:13,959 INFO L225 Difference]: With dead ends: 167 [2021-04-15 02:22:13,959 INFO L226 Difference]: Without dead ends: 166 [2021-04-15 02:22:13,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-04-15 02:22:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-04-15 02:22:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-04-15 02:22:13,963 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-04-15 02:22:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:13,963 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-04-15 02:22:13,963 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) [2021-04-15 02:22:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-04-15 02:22:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:13,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:13,964 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:14,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:14,177 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1189197051, now seen corresponding path program 16 times [2021-04-15 02:22:14,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:14,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545489788] [2021-04-15 02:22:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545489788] [2021-04-15 02:22:14,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366233545] [2021-04-15 02:22:14,221 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 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 [2021-04-15 02:22:14,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:14,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:14,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:14,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381973389] [2021-04-15 02:22:14,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:14,289 INFO L87 Difference]: Start difference. First operand 110 states and 300 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) [2021-04-15 02:22:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:14,330 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2021-04-15 02:22:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:22:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:14,331 INFO L225 Difference]: With dead ends: 181 [2021-04-15 02:22:14,331 INFO L226 Difference]: Without dead ends: 181 [2021-04-15 02:22:14,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-04-15 02:22:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 110. [2021-04-15 02:22:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-04-15 02:22:14,335 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-04-15 02:22:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:14,335 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-04-15 02:22:14,335 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) [2021-04-15 02:22:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-04-15 02:22:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:14,336 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:14,336 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:14,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-04-15 02:22:14,558 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:14,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:14,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1977391626, now seen corresponding path program 17 times [2021-04-15 02:22:14,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:14,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131461658] [2021-04-15 02:22:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131461658] [2021-04-15 02:22:14,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597489162] [2021-04-15 02:22:14,610 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 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 [2021-04-15 02:22:14,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:22:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:14,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:14,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:14,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:14,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:14,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113016336] [2021-04-15 02:22:14,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:14,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:14,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:14,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:14,681 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:14,770 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2021-04-15 02:22:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:14,771 INFO L225 Difference]: With dead ends: 148 [2021-04-15 02:22:14,771 INFO L226 Difference]: Without dead ends: 146 [2021-04-15 02:22:14,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-04-15 02:22:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-04-15 02:22:14,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-04-15 02:22:14,775 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-04-15 02:22:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:14,775 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-04-15 02:22:14,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-04-15 02:22:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:14,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:14,777 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:14,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 02:22:14,999 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:14,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:14,999 INFO L82 PathProgramCache]: Analyzing trace with hash -539850283, now seen corresponding path program 18 times [2021-04-15 02:22:14,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:14,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257323551] [2021-04-15 02:22:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257323551] [2021-04-15 02:22:15,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50717790] [2021-04-15 02:22:15,047 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 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 [2021-04-15 02:22:15,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:22:15,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:15,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:15,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:15,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:15,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596158217] [2021-04-15 02:22:15,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:15,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:15,110 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:15,176 INFO L93 Difference]: Finished difference Result 194 states and 419 transitions. [2021-04-15 02:22:15,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:15,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:15,177 INFO L225 Difference]: With dead ends: 194 [2021-04-15 02:22:15,177 INFO L226 Difference]: Without dead ends: 194 [2021-04-15 02:22:15,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-04-15 02:22:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2021-04-15 02:22:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-04-15 02:22:15,181 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-04-15 02:22:15,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:15,181 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-04-15 02:22:15,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:15,181 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-04-15 02:22:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:15,182 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:15,182 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:15,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:15,404 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash 746378496, now seen corresponding path program 19 times [2021-04-15 02:22:15,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:15,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934954148] [2021-04-15 02:22:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:15,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934954148] [2021-04-15 02:22:15,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155211533] [2021-04-15 02:22:15,446 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:15,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194744751] [2021-04-15 02:22:15,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:15,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:15,519 INFO L87 Difference]: Start difference. First operand 111 states and 301 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) [2021-04-15 02:22:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:15,568 INFO L93 Difference]: Finished difference Result 186 states and 412 transitions. [2021-04-15 02:22:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:22:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:15,570 INFO L225 Difference]: With dead ends: 186 [2021-04-15 02:22:15,570 INFO L226 Difference]: Without dead ends: 186 [2021-04-15 02:22:15,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:22:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-04-15 02:22:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 116. [2021-04-15 02:22:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.756521739130435) internal successors, (317), 115 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 317 transitions. [2021-04-15 02:22:15,575 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 317 transitions. Word has length 15 [2021-04-15 02:22:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:15,575 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 317 transitions. [2021-04-15 02:22:15,575 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) [2021-04-15 02:22:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 317 transitions. [2021-04-15 02:22:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:15,576 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:15,576 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:15,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-04-15 02:22:15,793 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:15,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:15,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1829668629, now seen corresponding path program 20 times [2021-04-15 02:22:15,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:15,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810829039] [2021-04-15 02:22:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:15,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810829039] [2021-04-15 02:22:15,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638951485] [2021-04-15 02:22:15,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:15,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:15,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:15,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:15,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188489991] [2021-04-15 02:22:15,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:15,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:15,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:15,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:15,904 INFO L87 Difference]: Start difference. First operand 116 states and 317 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) [2021-04-15 02:22:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:16,013 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2021-04-15 02:22:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:16,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:16,016 INFO L225 Difference]: With dead ends: 190 [2021-04-15 02:22:16,016 INFO L226 Difference]: Without dead ends: 188 [2021-04-15 02:22:16,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-04-15 02:22:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-04-15 02:22:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.8048780487804876) internal successors, (345), 123 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 345 transitions. [2021-04-15 02:22:16,020 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 345 transitions. Word has length 15 [2021-04-15 02:22:16,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:16,020 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 345 transitions. [2021-04-15 02:22:16,020 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) [2021-04-15 02:22:16,020 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 345 transitions. [2021-04-15 02:22:16,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:16,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:16,021 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:16,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:16,240 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:16,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:16,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1808496490, now seen corresponding path program 21 times [2021-04-15 02:22:16,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:16,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683394225] [2021-04-15 02:22:16,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683394225] [2021-04-15 02:22:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882758178] [2021-04-15 02:22:16,282 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 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 [2021-04-15 02:22:16,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:16,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:16,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:16,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:16,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:16,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401574786] [2021-04-15 02:22:16,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:16,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:16,350 INFO L87 Difference]: Start difference. First operand 124 states and 345 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) [2021-04-15 02:22:16,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:16,442 INFO L93 Difference]: Finished difference Result 188 states and 429 transitions. [2021-04-15 02:22:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:16,444 INFO L225 Difference]: With dead ends: 188 [2021-04-15 02:22:16,444 INFO L226 Difference]: Without dead ends: 187 [2021-04-15 02:22:16,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:16,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-04-15 02:22:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-04-15 02:22:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-04-15 02:22:16,448 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-04-15 02:22:16,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:16,448 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-04-15 02:22:16,448 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) [2021-04-15 02:22:16,448 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-04-15 02:22:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:16,448 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:16,448 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:16,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:16,665 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:16,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:16,666 INFO L82 PathProgramCache]: Analyzing trace with hash -886077757, now seen corresponding path program 22 times [2021-04-15 02:22:16,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:16,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791923371] [2021-04-15 02:22:16,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:16,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791923371] [2021-04-15 02:22:16,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201246442] [2021-04-15 02:22:16,706 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:16,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:16,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:16,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:16,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:16,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:16,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390802637] [2021-04-15 02:22:16,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:16,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:16,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:16,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:16,766 INFO L87 Difference]: Start difference. First operand 124 states and 344 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) [2021-04-15 02:22:16,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:16,808 INFO L93 Difference]: Finished difference Result 191 states and 431 transitions. [2021-04-15 02:22:16,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:22:16,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:16,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:16,810 INFO L225 Difference]: With dead ends: 191 [2021-04-15 02:22:16,810 INFO L226 Difference]: Without dead ends: 191 [2021-04-15 02:22:16,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-04-15 02:22:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-04-15 02:22:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:16,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-04-15 02:22:16,814 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-04-15 02:22:16,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:16,814 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-04-15 02:22:16,814 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) [2021-04-15 02:22:16,815 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-04-15 02:22:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:16,815 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:16,815 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:17,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-04-15 02:22:17,037 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:17,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash -97883182, now seen corresponding path program 23 times [2021-04-15 02:22:17,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:17,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164294154] [2021-04-15 02:22:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164294154] [2021-04-15 02:22:17,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396439546] [2021-04-15 02:22:17,076 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 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 [2021-04-15 02:22:17,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:22:17,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:17,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:17,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:17,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791882182] [2021-04-15 02:22:17,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:17,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:17,135 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:17,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:17,232 INFO L93 Difference]: Finished difference Result 193 states and 435 transitions. [2021-04-15 02:22:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:17,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:17,233 INFO L225 Difference]: With dead ends: 193 [2021-04-15 02:22:17,233 INFO L226 Difference]: Without dead ends: 191 [2021-04-15 02:22:17,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-04-15 02:22:17,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-04-15 02:22:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-04-15 02:22:17,237 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-04-15 02:22:17,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:17,238 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-04-15 02:22:17,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:17,238 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-04-15 02:22:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:17,238 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:17,238 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:17,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:17,453 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:17,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:17,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1679842205, now seen corresponding path program 24 times [2021-04-15 02:22:17,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:17,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382603691] [2021-04-15 02:22:17,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382603691] [2021-04-15 02:22:17,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096806170] [2021-04-15 02:22:17,491 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:17,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:22:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:17,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:17,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:17,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235851060] [2021-04-15 02:22:17,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:17,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:17,557 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:17,624 INFO L93 Difference]: Finished difference Result 200 states and 445 transitions. [2021-04-15 02:22:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:17,626 INFO L225 Difference]: With dead ends: 200 [2021-04-15 02:22:17,626 INFO L226 Difference]: Without dead ends: 200 [2021-04-15 02:22:17,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-04-15 02:22:17,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 124. [2021-04-15 02:22:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-04-15 02:22:17,630 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-04-15 02:22:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:17,630 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-04-15 02:22:17,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-04-15 02:22:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:17,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:17,632 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:17,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-04-15 02:22:17,845 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1391521814, now seen corresponding path program 25 times [2021-04-15 02:22:17,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:17,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203787546] [2021-04-15 02:22:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203787546] [2021-04-15 02:22:17,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379905438] [2021-04-15 02:22:17,889 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 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 [2021-04-15 02:22:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:17,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:17,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:17,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262163799] [2021-04-15 02:22:17,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:17,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:17,945 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:18,017 INFO L93 Difference]: Finished difference Result 157 states and 418 transitions. [2021-04-15 02:22:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:18,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:18,018 INFO L225 Difference]: With dead ends: 157 [2021-04-15 02:22:18,018 INFO L226 Difference]: Without dead ends: 154 [2021-04-15 02:22:18,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-04-15 02:22:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-04-15 02:22:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7804878048780486) internal successors, (342), 123 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 342 transitions. [2021-04-15 02:22:18,022 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 342 transitions. Word has length 15 [2021-04-15 02:22:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:18,022 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 342 transitions. [2021-04-15 02:22:18,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 342 transitions. [2021-04-15 02:22:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:18,023 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:18,023 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:18,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-15 02:22:18,241 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:18,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:18,241 INFO L82 PathProgramCache]: Analyzing trace with hash -381017597, now seen corresponding path program 26 times [2021-04-15 02:22:18,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:18,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840203557] [2021-04-15 02:22:18,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:18,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840203557] [2021-04-15 02:22:18,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790067605] [2021-04-15 02:22:18,299 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 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 [2021-04-15 02:22:18,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:18,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:18,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:18,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:18,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:18,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968600900] [2021-04-15 02:22:18,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:18,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:18,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:18,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:18,391 INFO L87 Difference]: Start difference. First operand 124 states and 342 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:18,495 INFO L93 Difference]: Finished difference Result 208 states and 481 transitions. [2021-04-15 02:22:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:18,497 INFO L225 Difference]: With dead ends: 208 [2021-04-15 02:22:18,497 INFO L226 Difference]: Without dead ends: 208 [2021-04-15 02:22:18,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-04-15 02:22:18,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2021-04-15 02:22:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-04-15 02:22:18,502 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 15 [2021-04-15 02:22:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:18,503 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-04-15 02:22:18,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-04-15 02:22:18,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:18,504 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:18,504 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:18,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 02:22:18,726 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash 837368888, now seen corresponding path program 27 times [2021-04-15 02:22:18,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:18,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412321756] [2021-04-15 02:22:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:18,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412321756] [2021-04-15 02:22:18,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926590567] [2021-04-15 02:22:18,775 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 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 [2021-04-15 02:22:18,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:22:18,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:18,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:18,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:18,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158321303] [2021-04-15 02:22:18,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:18,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:18,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:18,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:18,837 INFO L87 Difference]: Start difference. First operand 134 states and 376 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) [2021-04-15 02:22:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:18,885 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2021-04-15 02:22:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:22:18,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:18,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:18,887 INFO L225 Difference]: With dead ends: 216 [2021-04-15 02:22:18,887 INFO L226 Difference]: Without dead ends: 216 [2021-04-15 02:22:18,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-04-15 02:22:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2021-04-15 02:22:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-04-15 02:22:18,891 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 15 [2021-04-15 02:22:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:18,891 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-04-15 02:22:18,892 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) [2021-04-15 02:22:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-04-15 02:22:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:18,892 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:18,892 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:19,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 02:22:19,114 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1920659021, now seen corresponding path program 28 times [2021-04-15 02:22:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:19,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62250964] [2021-04-15 02:22:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62250964] [2021-04-15 02:22:19,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163741349] [2021-04-15 02:22:19,155 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 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 [2021-04-15 02:22:19,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:19,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:19,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:19,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:19,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:19,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:19,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685785885] [2021-04-15 02:22:19,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:19,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:19,217 INFO L87 Difference]: Start difference. First operand 139 states and 394 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) [2021-04-15 02:22:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:19,301 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2021-04-15 02:22:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:19,301 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:19,302 INFO L225 Difference]: With dead ends: 221 [2021-04-15 02:22:19,302 INFO L226 Difference]: Without dead ends: 219 [2021-04-15 02:22:19,303 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:19,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-04-15 02:22:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-04-15 02:22:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9166666666666665) internal successors, (455), 156 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) [2021-04-15 02:22:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 455 transitions. [2021-04-15 02:22:19,308 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 455 transitions. Word has length 15 [2021-04-15 02:22:19,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:19,308 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 455 transitions. [2021-04-15 02:22:19,309 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) [2021-04-15 02:22:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 455 transitions. [2021-04-15 02:22:19,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:19,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:19,309 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:19,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:19,529 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1717506098, now seen corresponding path program 29 times [2021-04-15 02:22:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962732288] [2021-04-15 02:22:19,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962732288] [2021-04-15 02:22:19,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504429168] [2021-04-15 02:22:19,573 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 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 [2021-04-15 02:22:19,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:22:19,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:19,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:19,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:19,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:19,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307542438] [2021-04-15 02:22:19,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:19,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:19,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:19,628 INFO L87 Difference]: Start difference. First operand 157 states and 455 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) [2021-04-15 02:22:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:19,709 INFO L93 Difference]: Finished difference Result 232 states and 558 transitions. [2021-04-15 02:22:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:19,710 INFO L225 Difference]: With dead ends: 232 [2021-04-15 02:22:19,710 INFO L226 Difference]: Without dead ends: 231 [2021-04-15 02:22:19,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-04-15 02:22:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 157. [2021-04-15 02:22:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2021-04-15 02:22:19,717 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 15 [2021-04-15 02:22:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:19,717 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2021-04-15 02:22:19,717 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) [2021-04-15 02:22:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2021-04-15 02:22:19,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:19,718 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:19,718 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:19,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:19,941 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:19,941 INFO L82 PathProgramCache]: Analyzing trace with hash -795087365, now seen corresponding path program 30 times [2021-04-15 02:22:19,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:19,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877809378] [2021-04-15 02:22:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:19,979 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:19,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877809378] [2021-04-15 02:22:19,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333606565] [2021-04-15 02:22:19,980 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 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 [2021-04-15 02:22:20,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:22:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:20,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:20,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:20,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075252583] [2021-04-15 02:22:20,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:20,037 INFO L87 Difference]: Start difference. First operand 157 states and 453 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) [2021-04-15 02:22:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:20,076 INFO L93 Difference]: Finished difference Result 220 states and 530 transitions. [2021-04-15 02:22:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:22:20,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:20,077 INFO L225 Difference]: With dead ends: 220 [2021-04-15 02:22:20,077 INFO L226 Difference]: Without dead ends: 220 [2021-04-15 02:22:20,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:20,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-04-15 02:22:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-04-15 02:22:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8967741935483873) internal successors, (449), 155 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 449 transitions. [2021-04-15 02:22:20,082 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 449 transitions. Word has length 15 [2021-04-15 02:22:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:20,082 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 449 transitions. [2021-04-15 02:22:20,082 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) [2021-04-15 02:22:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 449 transitions. [2021-04-15 02:22:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:20,083 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:20,083 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:20,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:20,304 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:20,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash -6892790, now seen corresponding path program 31 times [2021-04-15 02:22:20,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:20,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279106764] [2021-04-15 02:22:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279106764] [2021-04-15 02:22:20,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294071997] [2021-04-15 02:22:20,343 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:20,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:20,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302362890] [2021-04-15 02:22:20,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:20,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:20,413 INFO L87 Difference]: Start difference. First operand 156 states and 449 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:20,509 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2021-04-15 02:22:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:20,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:20,510 INFO L225 Difference]: With dead ends: 236 [2021-04-15 02:22:20,510 INFO L226 Difference]: Without dead ends: 234 [2021-04-15 02:22:20,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-04-15 02:22:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2021-04-15 02:22:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-04-15 02:22:20,514 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-04-15 02:22:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:20,514 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-04-15 02:22:20,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-04-15 02:22:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:20,515 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:20,515 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:20,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-04-15 02:22:20,737 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1770832597, now seen corresponding path program 32 times [2021-04-15 02:22:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:20,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916240628] [2021-04-15 02:22:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:20,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916240628] [2021-04-15 02:22:20,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000108361] [2021-04-15 02:22:20,774 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:20,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:20,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:20,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:20,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:20,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:20,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:20,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481371381] [2021-04-15 02:22:20,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:20,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:20,852 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:20,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:20,923 INFO L93 Difference]: Finished difference Result 225 states and 538 transitions. [2021-04-15 02:22:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:20,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:20,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:20,925 INFO L225 Difference]: With dead ends: 225 [2021-04-15 02:22:20,925 INFO L226 Difference]: Without dead ends: 225 [2021-04-15 02:22:20,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-04-15 02:22:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 156. [2021-04-15 02:22:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-04-15 02:22:20,930 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-04-15 02:22:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:20,930 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-04-15 02:22:20,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-04-15 02:22:20,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:20,930 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:20,930 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:21,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:21,153 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1482512206, now seen corresponding path program 33 times [2021-04-15 02:22:21,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:21,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620555127] [2021-04-15 02:22:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:21,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620555127] [2021-04-15 02:22:21,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980241202] [2021-04-15 02:22:21,195 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:21,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:22:21,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:21,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592900249] [2021-04-15 02:22:21,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:21,268 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:21,342 INFO L93 Difference]: Finished difference Result 210 states and 549 transitions. [2021-04-15 02:22:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:21,343 INFO L225 Difference]: With dead ends: 210 [2021-04-15 02:22:21,343 INFO L226 Difference]: Without dead ends: 207 [2021-04-15 02:22:21,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-04-15 02:22:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-04-15 02:22:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-04-15 02:22:21,347 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-04-15 02:22:21,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:21,348 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-04-15 02:22:21,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-04-15 02:22:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:21,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:21,348 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:21,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-04-15 02:22:21,565 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash -290027205, now seen corresponding path program 34 times [2021-04-15 02:22:21,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:21,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534976911] [2021-04-15 02:22:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:21,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534976911] [2021-04-15 02:22:21,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756211974] [2021-04-15 02:22:21,600 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 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 [2021-04-15 02:22:21,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:21,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:21,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:21,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:21,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233000101] [2021-04-15 02:22:21,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:21,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:21,680 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:21,757 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2021-04-15 02:22:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:21,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:21,759 INFO L225 Difference]: With dead ends: 201 [2021-04-15 02:22:21,759 INFO L226 Difference]: Without dead ends: 201 [2021-04-15 02:22:21,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-04-15 02:22:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-04-15 02:22:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-04-15 02:22:21,763 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-04-15 02:22:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-04-15 02:22:21,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-04-15 02:22:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:21,764 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:21,764 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:21,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:21,977 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash 409426826, now seen corresponding path program 35 times [2021-04-15 02:22:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:21,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021375769] [2021-04-15 02:22:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021375769] [2021-04-15 02:22:22,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716265709] [2021-04-15 02:22:22,017 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 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 [2021-04-15 02:22:22,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:22:22,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:22,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:22,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885871974] [2021-04-15 02:22:22,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:22,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:22,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:22,084 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:22,151 INFO L93 Difference]: Finished difference Result 199 states and 536 transitions. [2021-04-15 02:22:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:22:22,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:22,152 INFO L225 Difference]: With dead ends: 199 [2021-04-15 02:22:22,152 INFO L226 Difference]: Without dead ends: 195 [2021-04-15 02:22:22,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-04-15 02:22:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-04-15 02:22:22,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8774193548387097) internal successors, (446), 155 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 446 transitions. [2021-04-15 02:22:22,156 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 446 transitions. Word has length 15 [2021-04-15 02:22:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:22,156 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 446 transitions. [2021-04-15 02:22:22,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 446 transitions. [2021-04-15 02:22:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:22,157 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:22,157 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:22,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-15 02:22:22,370 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:22,371 INFO L82 PathProgramCache]: Analyzing trace with hash 247828373, now seen corresponding path program 36 times [2021-04-15 02:22:22,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:22,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454271930] [2021-04-15 02:22:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454271930] [2021-04-15 02:22:22,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654370231] [2021-04-15 02:22:22,410 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:22,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 02:22:22,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:22,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:22,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:22,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:22,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471517734] [2021-04-15 02:22:22,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:22,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:22,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:22,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:22,474 INFO L87 Difference]: Start difference. First operand 156 states and 446 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:22,595 INFO L93 Difference]: Finished difference Result 212 states and 544 transitions. [2021-04-15 02:22:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 02:22:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:22,597 INFO L225 Difference]: With dead ends: 212 [2021-04-15 02:22:22,597 INFO L226 Difference]: Without dead ends: 212 [2021-04-15 02:22:22,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-04-15 02:22:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-04-15 02:22:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.888198757763975) internal successors, (465), 161 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 465 transitions. [2021-04-15 02:22:22,601 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 465 transitions. Word has length 15 [2021-04-15 02:22:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:22,601 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 465 transitions. [2021-04-15 02:22:22,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-04-15 02:22:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 465 transitions. [2021-04-15 02:22:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:22,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:22,602 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:22,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-04-15 02:22:22,815 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:22,816 INFO L82 PathProgramCache]: Analyzing trace with hash -636896256, now seen corresponding path program 37 times [2021-04-15 02:22:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:22,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364492765] [2021-04-15 02:22:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364492765] [2021-04-15 02:22:22,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196335634] [2021-04-15 02:22:22,856 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:22,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:22,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:22,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:22,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:22,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31015713] [2021-04-15 02:22:22,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:22,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:22,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:22,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:22,911 INFO L87 Difference]: Start difference. First operand 162 states and 465 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) [2021-04-15 02:22:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:22,954 INFO L93 Difference]: Finished difference Result 260 states and 622 transitions. [2021-04-15 02:22:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:22:22,955 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 [2021-04-15 02:22:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:22,956 INFO L225 Difference]: With dead ends: 260 [2021-04-15 02:22:22,956 INFO L226 Difference]: Without dead ends: 260 [2021-04-15 02:22:22,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:22,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-04-15 02:22:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2021-04-15 02:22:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9221556886227544) internal successors, (488), 167 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:22,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 488 transitions. [2021-04-15 02:22:22,961 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 488 transitions. Word has length 15 [2021-04-15 02:22:22,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:22,961 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 488 transitions. [2021-04-15 02:22:22,961 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) [2021-04-15 02:22:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 488 transitions. [2021-04-15 02:22:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:22,962 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:22,962 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:23,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-04-15 02:22:23,178 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:23,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:23,179 INFO L82 PathProgramCache]: Analyzing trace with hash 446393877, now seen corresponding path program 38 times [2021-04-15 02:22:23,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:23,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387507582] [2021-04-15 02:22:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387507582] [2021-04-15 02:22:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592110416] [2021-04-15 02:22:23,224 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 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 [2021-04-15 02:22:23,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:23,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:23,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:23,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:23,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:23,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:23,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399681660] [2021-04-15 02:22:23,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:23,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:23,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:23,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:23,277 INFO L87 Difference]: Start difference. First operand 168 states and 488 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) [2021-04-15 02:22:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:23,373 INFO L93 Difference]: Finished difference Result 258 states and 649 transitions. [2021-04-15 02:22:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:23,378 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 [2021-04-15 02:22:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:23,380 INFO L225 Difference]: With dead ends: 258 [2021-04-15 02:22:23,380 INFO L226 Difference]: Without dead ends: 256 [2021-04-15 02:22:23,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-04-15 02:22:23,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 195. [2021-04-15 02:22:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-04-15 02:22:23,385 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 15 [2021-04-15 02:22:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:23,385 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-04-15 02:22:23,385 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) [2021-04-15 02:22:23,386 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-04-15 02:22:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:23,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:23,386 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:23,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:23,601 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:23,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1103196054, now seen corresponding path program 39 times [2021-04-15 02:22:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:23,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181224433] [2021-04-15 02:22:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:23,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181224433] [2021-04-15 02:22:23,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744600764] [2021-04-15 02:22:23,638 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:23,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:22:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:23,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:23,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:23,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:23,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946910707] [2021-04-15 02:22:23,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:23,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:23,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:23,689 INFO L87 Difference]: Start difference. First operand 195 states and 577 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) [2021-04-15 02:22:23,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:23,768 INFO L93 Difference]: Finished difference Result 275 states and 689 transitions. [2021-04-15 02:22:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:23,769 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 [2021-04-15 02:22:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:23,770 INFO L225 Difference]: With dead ends: 275 [2021-04-15 02:22:23,770 INFO L226 Difference]: Without dead ends: 274 [2021-04-15 02:22:23,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-04-15 02:22:23,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2021-04-15 02:22:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-04-15 02:22:23,775 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 15 [2021-04-15 02:22:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:23,777 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-04-15 02:22:23,777 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) [2021-04-15 02:22:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-04-15 02:22:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:23,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:23,777 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:24,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,000 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:24,001 INFO L82 PathProgramCache]: Analyzing trace with hash 2025614787, now seen corresponding path program 40 times [2021-04-15 02:22:24,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:24,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802116967] [2021-04-15 02:22:24,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802116967] [2021-04-15 02:22:24,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258190760] [2021-04-15 02:22:24,040 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:24,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:24,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:24,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:24,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-04-15 02:22:24,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377917128] [2021-04-15 02:22:24,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 02:22:24,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:24,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 02:22:24,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:22:24,086 INFO L87 Difference]: Start difference. First operand 195 states and 576 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) [2021-04-15 02:22:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:24,123 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2021-04-15 02:22:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:22:24,124 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 [2021-04-15 02:22:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:24,125 INFO L225 Difference]: With dead ends: 245 [2021-04-15 02:22:24,125 INFO L226 Difference]: Without dead ends: 245 [2021-04-15 02:22:24,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-04-15 02:22:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-04-15 02:22:24,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-04-15 02:22:24,129 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 15 [2021-04-15 02:22:24,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:24,129 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-04-15 02:22:24,129 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) [2021-04-15 02:22:24,129 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-04-15 02:22:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:24,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:24,130 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:24,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,352 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:24,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1481157934, now seen corresponding path program 41 times [2021-04-15 02:22:24,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:24,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699102110] [2021-04-15 02:22:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699102110] [2021-04-15 02:22:24,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462639263] [2021-04-15 02:22:24,389 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 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 [2021-04-15 02:22:24,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 02:22:24,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:24,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:24,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:24,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:24,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773591733] [2021-04-15 02:22:24,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:24,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:24,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:24,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:24,445 INFO L87 Difference]: Start difference. First operand 194 states and 570 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:24,535 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2021-04-15 02:22:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:24,536 INFO L225 Difference]: With dead ends: 279 [2021-04-15 02:22:24,536 INFO L226 Difference]: Without dead ends: 277 [2021-04-15 02:22:24,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-04-15 02:22:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 194. [2021-04-15 02:22:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.948186528497409) internal successors, (569), 193 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 569 transitions. [2021-04-15 02:22:24,541 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 569 transitions. Word has length 15 [2021-04-15 02:22:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:24,541 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 569 transitions. [2021-04-15 02:22:24,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 569 transitions. [2021-04-15 02:22:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:24,542 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:24,542 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:24,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,763 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:24,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:24,764 INFO L82 PathProgramCache]: Analyzing trace with hash 296567453, now seen corresponding path program 42 times [2021-04-15 02:22:24,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:24,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381624498] [2021-04-15 02:22:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381624498] [2021-04-15 02:22:24,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598988375] [2021-04-15 02:22:24,799 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:24,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:22:24,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:24,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:24,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:24,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245201328] [2021-04-15 02:22:24,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:24,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:24,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:24,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:24,862 INFO L87 Difference]: Start difference. First operand 194 states and 569 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:24,922 INFO L93 Difference]: Finished difference Result 248 states and 633 transitions. [2021-04-15 02:22:24,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:22:24,922 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:24,923 INFO L225 Difference]: With dead ends: 248 [2021-04-15 02:22:24,923 INFO L226 Difference]: Without dead ends: 248 [2021-04-15 02:22:24,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-04-15 02:22:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2021-04-15 02:22:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-04-15 02:22:24,932 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 15 [2021-04-15 02:22:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:24,932 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-04-15 02:22:24,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-04-15 02:22:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:24,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:24,933 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:25,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:25,154 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:25,155 INFO L82 PathProgramCache]: Analyzing trace with hash 8247062, now seen corresponding path program 43 times [2021-04-15 02:22:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:25,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638048174] [2021-04-15 02:22:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:25,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638048174] [2021-04-15 02:22:25,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858340206] [2021-04-15 02:22:25,190 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 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 [2021-04-15 02:22:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:25,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:25,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:25,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:25,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:25,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196669188] [2021-04-15 02:22:25,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:25,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:25,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:25,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:25,245 INFO L87 Difference]: Start difference. First operand 192 states and 562 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:25,324 INFO L93 Difference]: Finished difference Result 252 states and 674 transitions. [2021-04-15 02:22:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:25,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:25,326 INFO L225 Difference]: With dead ends: 252 [2021-04-15 02:22:25,326 INFO L226 Difference]: Without dead ends: 249 [2021-04-15 02:22:25,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-04-15 02:22:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2021-04-15 02:22:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.93717277486911) internal successors, (561), 191 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:25,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 561 transitions. [2021-04-15 02:22:25,330 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 561 transitions. Word has length 15 [2021-04-15 02:22:25,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:25,330 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 561 transitions. [2021-04-15 02:22:25,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:25,331 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 561 transitions. [2021-04-15 02:22:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:25,331 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:25,331 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:25,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-04-15 02:22:25,545 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1764292349, now seen corresponding path program 44 times [2021-04-15 02:22:25,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:25,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485002681] [2021-04-15 02:22:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485002681] [2021-04-15 02:22:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407143272] [2021-04-15 02:22:25,581 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 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 [2021-04-15 02:22:25,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:25,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:25,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:25,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:25,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:25,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754615488] [2021-04-15 02:22:25,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:25,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:25,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:25,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:25,658 INFO L87 Difference]: Start difference. First operand 192 states and 561 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:25,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:25,726 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-04-15 02:22:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:22:25,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:25,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:25,728 INFO L225 Difference]: With dead ends: 226 [2021-04-15 02:22:25,728 INFO L226 Difference]: Without dead ends: 226 [2021-04-15 02:22:25,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-04-15 02:22:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-04-15 02:22:25,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-04-15 02:22:25,731 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 15 [2021-04-15 02:22:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:25,731 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-04-15 02:22:25,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:25,732 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-04-15 02:22:25,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:25,732 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:25,732 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:25,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:25,949 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1064838318, now seen corresponding path program 45 times [2021-04-15 02:22:25,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:25,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240077637] [2021-04-15 02:22:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:25,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240077637] [2021-04-15 02:22:25,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101530705] [2021-04-15 02:22:25,985 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:26,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 02:22:26,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:26,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:26,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973551978] [2021-04-15 02:22:26,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:26,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:26,055 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:26,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:26,135 INFO L93 Difference]: Finished difference Result 241 states and 654 transitions. [2021-04-15 02:22:26,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:26,136 INFO L225 Difference]: With dead ends: 241 [2021-04-15 02:22:26,136 INFO L226 Difference]: Without dead ends: 237 [2021-04-15 02:22:26,137 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-04-15 02:22:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2021-04-15 02:22:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-04-15 02:22:26,141 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-04-15 02:22:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:26,141 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-04-15 02:22:26,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-04-15 02:22:26,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:26,142 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:26,142 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:26,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-04-15 02:22:26,357 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:26,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1226436771, now seen corresponding path program 46 times [2021-04-15 02:22:26,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:26,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756701605] [2021-04-15 02:22:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756701605] [2021-04-15 02:22:26,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072294655] [2021-04-15 02:22:26,397 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:26,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:26,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:26,458 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:26,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:26,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732131943] [2021-04-15 02:22:26,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:26,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:26,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:26,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:26,459 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:26,549 INFO L93 Difference]: Finished difference Result 216 states and 593 transitions. [2021-04-15 02:22:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:26,550 INFO L225 Difference]: With dead ends: 216 [2021-04-15 02:22:26,550 INFO L226 Difference]: Without dead ends: 216 [2021-04-15 02:22:26,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-04-15 02:22:26,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2021-04-15 02:22:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-04-15 02:22:26,553 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-04-15 02:22:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:26,553 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-04-15 02:22:26,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-04-15 02:22:26,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:26,554 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:26,554 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:26,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:26,761 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 29253270, now seen corresponding path program 47 times [2021-04-15 02:22:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:26,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247262144] [2021-04-15 02:22:26,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247262144] [2021-04-15 02:22:26,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218186620] [2021-04-15 02:22:26,797 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 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 [2021-04-15 02:22:26,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:22:26,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:26,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:26,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:26,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:26,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519335949] [2021-04-15 02:22:26,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:26,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:26,857 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:26,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:26,932 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-04-15 02:22:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:26,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:26,935 INFO L225 Difference]: With dead ends: 234 [2021-04-15 02:22:26,935 INFO L226 Difference]: Without dead ends: 229 [2021-04-15 02:22:26,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:26,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-04-15 02:22:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2021-04-15 02:22:26,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.93048128342246) internal successors, (548), 187 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 548 transitions. [2021-04-15 02:22:26,939 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 548 transitions. Word has length 15 [2021-04-15 02:22:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:26,939 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 548 transitions. [2021-04-15 02:22:26,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:26,939 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 548 transitions. [2021-04-15 02:22:26,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 02:22:26,940 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:26,940 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:27,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-04-15 02:22:27,162 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:27,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1732783037, now seen corresponding path program 48 times [2021-04-15 02:22:27,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:27,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788515407] [2021-04-15 02:22:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:27,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788515407] [2021-04-15 02:22:27,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847663356] [2021-04-15 02:22:27,204 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 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 [2021-04-15 02:22:27,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:22:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 02:22:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:27,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:27,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 02:22:27,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231492494] [2021-04-15 02:22:27,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 02:22:27,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 02:22:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 02:22:27,265 INFO L87 Difference]: Start difference. First operand 188 states and 548 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:27,396 INFO L93 Difference]: Finished difference Result 251 states and 681 transitions. [2021-04-15 02:22:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:22:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 [2021-04-15 02:22:27,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:27,398 INFO L225 Difference]: With dead ends: 251 [2021-04-15 02:22:27,398 INFO L226 Difference]: Without dead ends: 251 [2021-04-15 02:22:27,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:27,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-04-15 02:22:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-04-15 02:22:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.923076923076923) internal successors, (570), 195 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 570 transitions. [2021-04-15 02:22:27,402 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 570 transitions. Word has length 15 [2021-04-15 02:22:27,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:27,402 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 570 transitions. [2021-04-15 02:22:27,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-04-15 02:22:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 570 transitions. [2021-04-15 02:22:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:22:27,402 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:27,403 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:27,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 02:22:27,617 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1137660823, now seen corresponding path program 49 times [2021-04-15 02:22:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:27,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520202791] [2021-04-15 02:22:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:27,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520202791] [2021-04-15 02:22:27,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470066820] [2021-04-15 02:22:27,678 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 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 [2021-04-15 02:22:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:27,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:27,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:27,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 02:22:27,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035584243] [2021-04-15 02:22:27,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:22:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:22:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:27,777 INFO L87 Difference]: Start difference. First operand 196 states and 570 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2021-04-15 02:22:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:27,832 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-04-15 02:22:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:22:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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 [2021-04-15 02:22:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:27,834 INFO L225 Difference]: With dead ends: 378 [2021-04-15 02:22:27,834 INFO L226 Difference]: Without dead ends: 378 [2021-04-15 02:22:27,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:22:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-04-15 02:22:27,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 234. [2021-04-15 02:22:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8583690987124464) internal successors, (666), 233 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 666 transitions. [2021-04-15 02:22:27,839 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 666 transitions. Word has length 16 [2021-04-15 02:22:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:27,839 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 666 transitions. [2021-04-15 02:22:27,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2021-04-15 02:22:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 666 transitions. [2021-04-15 02:22:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:22:27,840 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:27,840 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:28,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 02:22:28,057 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:28,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:28,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1759521079, now seen corresponding path program 50 times [2021-04-15 02:22:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626626155] [2021-04-15 02:22:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:28,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626626155] [2021-04-15 02:22:28,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174602687] [2021-04-15 02:22:28,128 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:28,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 02:22:28,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:28,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:28,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 02:22:28,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849139310] [2021-04-15 02:22:28,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:28,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:28,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:28,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:28,210 INFO L87 Difference]: Start difference. First operand 234 states and 666 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:28,277 INFO L93 Difference]: Finished difference Result 439 states and 1228 transitions. [2021-04-15 02:22:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:22:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-04-15 02:22:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:28,279 INFO L225 Difference]: With dead ends: 439 [2021-04-15 02:22:28,279 INFO L226 Difference]: Without dead ends: 439 [2021-04-15 02:22:28,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-04-15 02:22:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2021-04-15 02:22:28,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8362989323843415) internal successors, (797), 281 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 797 transitions. [2021-04-15 02:22:28,285 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 797 transitions. Word has length 17 [2021-04-15 02:22:28,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:28,285 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 797 transitions. [2021-04-15 02:22:28,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 797 transitions. [2021-04-15 02:22:28,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:22:28,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:28,286 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:28,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 02:22:28,507 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:28,507 INFO L82 PathProgramCache]: Analyzing trace with hash -437647465, now seen corresponding path program 51 times [2021-04-15 02:22:28,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:28,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41060777] [2021-04-15 02:22:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:28,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41060777] [2021-04-15 02:22:28,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662235011] [2021-04-15 02:22:28,612 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:28,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:28,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:28,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 02:22:28,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:22:28,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:28,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 02:22:28,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999677063] [2021-04-15 02:22:28,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:22:28,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:28,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:22:28,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:22:28,738 INFO L87 Difference]: Start difference. First operand 282 states and 797 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:28,838 INFO L93 Difference]: Finished difference Result 508 states and 1418 transitions. [2021-04-15 02:22:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:22:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:22:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:28,840 INFO L225 Difference]: With dead ends: 508 [2021-04-15 02:22:28,840 INFO L226 Difference]: Without dead ends: 507 [2021-04-15 02:22:28,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-04-15 02:22:28,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 340. [2021-04-15 02:22:28,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.8348082595870205) internal successors, (961), 339 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 961 transitions. [2021-04-15 02:22:28,847 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 961 transitions. Word has length 18 [2021-04-15 02:22:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:28,847 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 961 transitions. [2021-04-15 02:22:28,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 961 transitions. [2021-04-15 02:22:28,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:28,848 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:28,848 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:29,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-04-15 02:22:29,069 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:29,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:29,070 INFO L82 PathProgramCache]: Analyzing trace with hash 169604407, now seen corresponding path program 52 times [2021-04-15 02:22:29,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:29,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030434645] [2021-04-15 02:22:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:29,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030434645] [2021-04-15 02:22:29,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990343012] [2021-04-15 02:22:29,144 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 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 [2021-04-15 02:22:29,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:29,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:29,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:29,423 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:29,423 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 [2021-04-15 02:22:30,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:30,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:30,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:30,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:30,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:30,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:30,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62516586] [2021-04-15 02:22:30,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:30,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:30,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:30,149 INFO L87 Difference]: Start difference. First operand 340 states and 961 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:30,354 INFO L93 Difference]: Finished difference Result 489 states and 1247 transitions. [2021-04-15 02:22:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:22:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:30,356 INFO L225 Difference]: With dead ends: 489 [2021-04-15 02:22:30,356 INFO L226 Difference]: Without dead ends: 486 [2021-04-15 02:22:30,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:30,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-04-15 02:22:30,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 387. [2021-04-15 02:22:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.8626943005181347) internal successors, (1105), 386 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1105 transitions. [2021-04-15 02:22:30,363 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1105 transitions. Word has length 19 [2021-04-15 02:22:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:30,363 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 1105 transitions. [2021-04-15 02:22:30,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:30,363 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1105 transitions. [2021-04-15 02:22:30,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:30,364 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:30,364 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:30,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-04-15 02:22:30,581 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:30,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:30,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1764941355, now seen corresponding path program 53 times [2021-04-15 02:22:30,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:30,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717771086] [2021-04-15 02:22:30,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:30,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717771086] [2021-04-15 02:22:30,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115739718] [2021-04-15 02:22:30,635 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:30,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:22:30,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:30,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:30,954 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:22:30,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:30,954 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 [2021-04-15 02:22:32,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:32,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:32,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:32,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:32,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:32,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:32,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063479753] [2021-04-15 02:22:32,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:32,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:32,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:32,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:32,278 INFO L87 Difference]: Start difference. First operand 387 states and 1105 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:32,487 INFO L93 Difference]: Finished difference Result 556 states and 1456 transitions. [2021-04-15 02:22:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:32,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:32,489 INFO L225 Difference]: With dead ends: 556 [2021-04-15 02:22:32,489 INFO L226 Difference]: Without dead ends: 553 [2021-04-15 02:22:32,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-04-15 02:22:32,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 432. [2021-04-15 02:22:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.9419953596287702) internal successors, (1268), 431 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1268 transitions. [2021-04-15 02:22:32,495 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1268 transitions. Word has length 19 [2021-04-15 02:22:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:32,495 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1268 transitions. [2021-04-15 02:22:32,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1268 transitions. [2021-04-15 02:22:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:32,497 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:32,497 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:32,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-04-15 02:22:32,718 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:32,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1606108669, now seen corresponding path program 54 times [2021-04-15 02:22:32,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:32,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085439853] [2021-04-15 02:22:32,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:32,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085439853] [2021-04-15 02:22:32,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510702196] [2021-04-15 02:22:32,779 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:32,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:32,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:33,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:33,083 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 [2021-04-15 02:22:35,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:35,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:35,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:35,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:35,076 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:35,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:35,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:35,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842749024] [2021-04-15 02:22:35,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:35,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:35,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:35,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:35,078 INFO L87 Difference]: Start difference. First operand 432 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:35,235 INFO L93 Difference]: Finished difference Result 627 states and 1702 transitions. [2021-04-15 02:22:35,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:35,236 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:35,238 INFO L225 Difference]: With dead ends: 627 [2021-04-15 02:22:35,238 INFO L226 Difference]: Without dead ends: 624 [2021-04-15 02:22:35,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-04-15 02:22:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 493. [2021-04-15 02:22:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.042682926829268) internal successors, (1497), 492 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:35,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1497 transitions. [2021-04-15 02:22:35,249 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1497 transitions. Word has length 19 [2021-04-15 02:22:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:35,250 INFO L480 AbstractCegarLoop]: Abstraction has 493 states and 1497 transitions. [2021-04-15 02:22:35,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1497 transitions. [2021-04-15 02:22:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:35,251 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:35,251 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:35,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-04-15 02:22:35,473 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash -977262699, now seen corresponding path program 55 times [2021-04-15 02:22:35,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:35,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056016694] [2021-04-15 02:22:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:35,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056016694] [2021-04-15 02:22:35,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261647677] [2021-04-15 02:22:35,533 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:35,857 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:22:35,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:35,858 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 [2021-04-15 02:22:36,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:36,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:36,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:36,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:36,631 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:36,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:36,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:36,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988630611] [2021-04-15 02:22:36,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:36,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:36,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:36,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:36,632 INFO L87 Difference]: Start difference. First operand 493 states and 1497 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:36,870 INFO L93 Difference]: Finished difference Result 708 states and 2005 transitions. [2021-04-15 02:22:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:36,873 INFO L225 Difference]: With dead ends: 708 [2021-04-15 02:22:36,873 INFO L226 Difference]: Without dead ends: 705 [2021-04-15 02:22:36,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-04-15 02:22:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 574. [2021-04-15 02:22:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1448516579406633) internal successors, (1802), 573 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1802 transitions. [2021-04-15 02:22:36,885 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1802 transitions. Word has length 19 [2021-04-15 02:22:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:36,885 INFO L480 AbstractCegarLoop]: Abstraction has 574 states and 1802 transitions. [2021-04-15 02:22:36,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1802 transitions. [2021-04-15 02:22:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:36,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:36,886 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:37,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-04-15 02:22:37,087 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:37,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:37,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1337093187, now seen corresponding path program 56 times [2021-04-15 02:22:37,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:37,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957761720] [2021-04-15 02:22:37,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:22:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957761720] [2021-04-15 02:22:37,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050710161] [2021-04-15 02:22:37,152 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:37,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:37,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:37,471 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:22:37,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:37,471 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 [2021-04-15 02:22:38,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:38,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:38,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:38,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:38,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:38,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:38,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985570127] [2021-04-15 02:22:38,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:38,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:38,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:38,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:38,129 INFO L87 Difference]: Start difference. First operand 574 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:38,319 INFO L93 Difference]: Finished difference Result 810 states and 2379 transitions. [2021-04-15 02:22:38,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:38,319 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:38,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:38,322 INFO L225 Difference]: With dead ends: 810 [2021-04-15 02:22:38,322 INFO L226 Difference]: Without dead ends: 807 [2021-04-15 02:22:38,322 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-04-15 02:22:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 673. [2021-04-15 02:22:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.232142857142857) internal successors, (2172), 672 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2172 transitions. [2021-04-15 02:22:38,332 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2172 transitions. Word has length 19 [2021-04-15 02:22:38,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:38,332 INFO L480 AbstractCegarLoop]: Abstraction has 673 states and 2172 transitions. [2021-04-15 02:22:38,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2172 transitions. [2021-04-15 02:22:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:38,334 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:38,334 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:38,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1468,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:38,545 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 67681621, now seen corresponding path program 57 times [2021-04-15 02:22:38,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:38,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714269293] [2021-04-15 02:22:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:38,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714269293] [2021-04-15 02:22:38,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723650163] [2021-04-15 02:22:38,603 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 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 [2021-04-15 02:22:38,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:22:38,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:38,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:38,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:38,934 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-04-15 02:22:38,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:38,934 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 [2021-04-15 02:22:39,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:39,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:39,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:39,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:39,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:39,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:39,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584405948] [2021-04-15 02:22:39,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:39,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:39,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:39,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:39,861 INFO L87 Difference]: Start difference. First operand 673 states and 2172 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:40,081 INFO L93 Difference]: Finished difference Result 900 states and 2698 transitions. [2021-04-15 02:22:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:40,086 INFO L225 Difference]: With dead ends: 900 [2021-04-15 02:22:40,086 INFO L226 Difference]: Without dead ends: 897 [2021-04-15 02:22:40,086 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:40,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-04-15 02:22:40,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 767. [2021-04-15 02:22:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.27023498694517) internal successors, (2505), 766 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2505 transitions. [2021-04-15 02:22:40,100 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2505 transitions. Word has length 19 [2021-04-15 02:22:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:40,100 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2505 transitions. [2021-04-15 02:22:40,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2505 transitions. [2021-04-15 02:22:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:40,101 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:40,101 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:40,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-04-15 02:22:40,317 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -629371261, now seen corresponding path program 58 times [2021-04-15 02:22:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:40,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017332071] [2021-04-15 02:22:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:40,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017332071] [2021-04-15 02:22:40,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644661025] [2021-04-15 02:22:40,377 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:40,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:40,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:40,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:40,693 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 [2021-04-15 02:22:41,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:41,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:41,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:41,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:41,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:41,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283483702] [2021-04-15 02:22:41,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:41,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:41,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:41,724 INFO L87 Difference]: Start difference. First operand 767 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:41,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:41,922 INFO L93 Difference]: Finished difference Result 993 states and 3021 transitions. [2021-04-15 02:22:41,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:41,923 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:41,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:41,927 INFO L225 Difference]: With dead ends: 993 [2021-04-15 02:22:41,927 INFO L226 Difference]: Without dead ends: 990 [2021-04-15 02:22:41,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-04-15 02:22:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 859. [2021-04-15 02:22:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.297202797202797) internal successors, (2829), 858 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:41,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2829 transitions. [2021-04-15 02:22:41,941 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2829 transitions. Word has length 19 [2021-04-15 02:22:41,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:41,941 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2829 transitions. [2021-04-15 02:22:41,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2829 transitions. [2021-04-15 02:22:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:41,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:41,943 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:42,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1990 [2021-04-15 02:22:42,157 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -763174123, now seen corresponding path program 59 times [2021-04-15 02:22:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:42,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746250331] [2021-04-15 02:22:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:42,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746250331] [2021-04-15 02:22:42,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187182490] [2021-04-15 02:22:42,211 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 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 [2021-04-15 02:22:42,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:22:42,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:42,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:42,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:42,480 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 [2021-04-15 02:22:43,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:43,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:43,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:43,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:43,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:43,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:43,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949135343] [2021-04-15 02:22:43,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:43,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:43,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:43,111 INFO L87 Difference]: Start difference. First operand 859 states and 2829 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:43,312 INFO L93 Difference]: Finished difference Result 1089 states and 3338 transitions. [2021-04-15 02:22:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:43,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:43,316 INFO L225 Difference]: With dead ends: 1089 [2021-04-15 02:22:43,316 INFO L226 Difference]: Without dead ends: 1086 [2021-04-15 02:22:43,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:43,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-04-15 02:22:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 952. [2021-04-15 02:22:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.3070452155625656) internal successors, (3145), 951 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3145 transitions. [2021-04-15 02:22:43,329 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3145 transitions. Word has length 19 [2021-04-15 02:22:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:43,329 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 3145 transitions. [2021-04-15 02:22:43,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3145 transitions. [2021-04-15 02:22:43,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 02:22:43,330 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:43,330 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:43,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:43,533 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:43,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:43,533 INFO L82 PathProgramCache]: Analyzing trace with hash -616095549, now seen corresponding path program 60 times [2021-04-15 02:22:43,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:43,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173048260] [2021-04-15 02:22:43,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173048260] [2021-04-15 02:22:43,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098763585] [2021-04-15 02:22:43,589 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 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 [2021-04-15 02:22:43,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:43,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:43,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 02:22:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:43,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:43,857 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 [2021-04-15 02:22:45,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:22:45,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:22:45,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:22:45,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-04-15 02:22:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:45,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:45,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-04-15 02:22:45,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932875779] [2021-04-15 02:22:45,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-04-15 02:22:45,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-04-15 02:22:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:45,590 INFO L87 Difference]: Start difference. First operand 952 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:45,806 INFO L93 Difference]: Finished difference Result 1152 states and 3567 transitions. [2021-04-15 02:22:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:22:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-04-15 02:22:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:45,812 INFO L225 Difference]: With dead ends: 1152 [2021-04-15 02:22:45,812 INFO L226 Difference]: Without dead ends: 1149 [2021-04-15 02:22:45,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:22:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-04-15 02:22:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1030. [2021-04-15 02:22:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.308066083576288) internal successors, (3404), 1029 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3404 transitions. [2021-04-15 02:22:45,829 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3404 transitions. Word has length 19 [2021-04-15 02:22:45,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:45,829 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3404 transitions. [2021-04-15 02:22:45,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-04-15 02:22:45,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3404 transitions. [2021-04-15 02:22:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:45,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:45,831 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:46,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:46,031 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:46,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1814543255, now seen corresponding path program 61 times [2021-04-15 02:22:46,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:46,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106946402] [2021-04-15 02:22:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:46,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106946402] [2021-04-15 02:22:46,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988178357] [2021-04-15 02:22:46,120 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 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 [2021-04-15 02:22:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:46,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:46,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:46,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:46,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:46,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248353957] [2021-04-15 02:22:46,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:46,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:46,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:46,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:46,196 INFO L87 Difference]: Start difference. First operand 1030 states and 3404 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:22:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:46,359 INFO L93 Difference]: Finished difference Result 1163 states and 3561 transitions. [2021-04-15 02:22:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:22:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:46,375 INFO L225 Difference]: With dead ends: 1163 [2021-04-15 02:22:46,375 INFO L226 Difference]: Without dead ends: 1163 [2021-04-15 02:22:46,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:22:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-04-15 02:22:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1002. [2021-04-15 02:22:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.2927072927072927) internal successors, (3296), 1001 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:46,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3296 transitions. [2021-04-15 02:22:46,394 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3296 transitions. Word has length 20 [2021-04-15 02:22:46,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:46,394 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 3296 transitions. [2021-04-15 02:22:46,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:22:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3296 transitions. [2021-04-15 02:22:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:46,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:46,396 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:46,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3259,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:46,618 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 963496790, now seen corresponding path program 62 times [2021-04-15 02:22:46,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:46,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384213187] [2021-04-15 02:22:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384213187] [2021-04-15 02:22:46,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941373668] [2021-04-15 02:22:46,694 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 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 [2021-04-15 02:22:46,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:46,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:46,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:46,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:46,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:22:46,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316261487] [2021-04-15 02:22:46,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:22:46,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:46,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:22:46,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:22:46,750 INFO L87 Difference]: Start difference. First operand 1002 states and 3296 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:22:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:47,008 INFO L93 Difference]: Finished difference Result 1245 states and 3687 transitions. [2021-04-15 02:22:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:22:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:22:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:47,014 INFO L225 Difference]: With dead ends: 1245 [2021-04-15 02:22:47,014 INFO L226 Difference]: Without dead ends: 1238 [2021-04-15 02:22:47,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:22:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-04-15 02:22:47,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1029. [2021-04-15 02:22:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.277237354085603) internal successors, (3369), 1028 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3369 transitions. [2021-04-15 02:22:47,027 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3369 transitions. Word has length 20 [2021-04-15 02:22:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:47,027 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3369 transitions. [2021-04-15 02:22:47,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:22:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3369 transitions. [2021-04-15 02:22:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:47,029 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:47,029 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:47,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3260,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:47,230 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:47,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1620089803, now seen corresponding path program 63 times [2021-04-15 02:22:47,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:47,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139563771] [2021-04-15 02:22:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:47,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139563771] [2021-04-15 02:22:47,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592321877] [2021-04-15 02:22:47,292 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 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 [2021-04-15 02:22:47,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:47,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:47,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:47,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:47,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019459180] [2021-04-15 02:22:47,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:47,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:47,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:47,345 INFO L87 Difference]: Start difference. First operand 1029 states and 3369 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) [2021-04-15 02:22:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:47,467 INFO L93 Difference]: Finished difference Result 1068 states and 3424 transitions. [2021-04-15 02:22:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:47,469 INFO L225 Difference]: With dead ends: 1068 [2021-04-15 02:22:47,469 INFO L226 Difference]: Without dead ends: 1067 [2021-04-15 02:22:47,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-04-15 02:22:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1029. [2021-04-15 02:22:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.2733463035019454) internal successors, (3365), 1028 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3365 transitions. [2021-04-15 02:22:47,487 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3365 transitions. Word has length 20 [2021-04-15 02:22:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:47,487 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3365 transitions. [2021-04-15 02:22:47,487 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) [2021-04-15 02:22:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3365 transitions. [2021-04-15 02:22:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:47,489 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:47,489 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:47,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-04-15 02:22:47,697 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:47,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1752458760, now seen corresponding path program 64 times [2021-04-15 02:22:47,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:47,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627128296] [2021-04-15 02:22:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627128296] [2021-04-15 02:22:47,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141007520] [2021-04-15 02:22:47,770 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:47,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:47,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:47,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:47,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18418097] [2021-04-15 02:22:47,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:47,835 INFO L87 Difference]: Start difference. First operand 1029 states and 3365 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) [2021-04-15 02:22:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:47,890 INFO L93 Difference]: Finished difference Result 1274 states and 3760 transitions. [2021-04-15 02:22:47,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:47,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:47,893 INFO L225 Difference]: With dead ends: 1274 [2021-04-15 02:22:47,893 INFO L226 Difference]: Without dead ends: 1274 [2021-04-15 02:22:47,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-04-15 02:22:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 995. [2021-04-15 02:22:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2575452716297786) internal successors, (3238), 994 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3238 transitions. [2021-04-15 02:22:47,906 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3238 transitions. Word has length 20 [2021-04-15 02:22:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:47,906 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 3238 transitions. [2021-04-15 02:22:47,906 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) [2021-04-15 02:22:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3238 transitions. [2021-04-15 02:22:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:47,907 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:47,907 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:48,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-04-15 02:22:48,108 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:48,108 INFO L82 PathProgramCache]: Analyzing trace with hash 38830179, now seen corresponding path program 65 times [2021-04-15 02:22:48,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:48,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143046619] [2021-04-15 02:22:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:48,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143046619] [2021-04-15 02:22:48,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964876002] [2021-04-15 02:22:48,165 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 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 [2021-04-15 02:22:48,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:48,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:48,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:48,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:48,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:48,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181648315] [2021-04-15 02:22:48,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:48,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:48,225 INFO L87 Difference]: Start difference. First operand 995 states and 3238 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) [2021-04-15 02:22:48,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:48,319 INFO L93 Difference]: Finished difference Result 1213 states and 3571 transitions. [2021-04-15 02:22:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:48,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:48,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:48,321 INFO L225 Difference]: With dead ends: 1213 [2021-04-15 02:22:48,321 INFO L226 Difference]: Without dead ends: 1213 [2021-04-15 02:22:48,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:22:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-04-15 02:22:48,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1013. [2021-04-15 02:22:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2371541501976284) internal successors, (3276), 1012 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3276 transitions. [2021-04-15 02:22:48,334 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3276 transitions. Word has length 20 [2021-04-15 02:22:48,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:48,334 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3276 transitions. [2021-04-15 02:22:48,334 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) [2021-04-15 02:22:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3276 transitions. [2021-04-15 02:22:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:48,336 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:48,336 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:48,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-04-15 02:22:48,536 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:48,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1122120312, now seen corresponding path program 66 times [2021-04-15 02:22:48,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:48,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583200549] [2021-04-15 02:22:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583200549] [2021-04-15 02:22:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800197873] [2021-04-15 02:22:48,601 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:48,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:48,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:48,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:48,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:48,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:48,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310108130] [2021-04-15 02:22:48,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:48,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:48,669 INFO L87 Difference]: Start difference. First operand 1013 states and 3276 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) [2021-04-15 02:22:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:48,849 INFO L93 Difference]: Finished difference Result 1229 states and 3602 transitions. [2021-04-15 02:22:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:48,852 INFO L225 Difference]: With dead ends: 1229 [2021-04-15 02:22:48,852 INFO L226 Difference]: Without dead ends: 1227 [2021-04-15 02:22:48,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-04-15 02:22:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1023. [2021-04-15 02:22:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.238747553816047) internal successors, (3310), 1022 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3310 transitions. [2021-04-15 02:22:48,875 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3310 transitions. Word has length 20 [2021-04-15 02:22:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:48,875 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3310 transitions. [2021-04-15 02:22:48,876 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) [2021-04-15 02:22:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3310 transitions. [2021-04-15 02:22:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:48,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:48,877 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:49,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-04-15 02:22:49,099 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1778922489, now seen corresponding path program 67 times [2021-04-15 02:22:49,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:49,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134420994] [2021-04-15 02:22:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:49,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134420994] [2021-04-15 02:22:49,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187816945] [2021-04-15 02:22:49,166 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:49,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:49,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:49,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180291645] [2021-04-15 02:22:49,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:49,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:49,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:49,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:49,228 INFO L87 Difference]: Start difference. First operand 1023 states and 3310 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) [2021-04-15 02:22:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:49,373 INFO L93 Difference]: Finished difference Result 1156 states and 3491 transitions. [2021-04-15 02:22:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:49,376 INFO L225 Difference]: With dead ends: 1156 [2021-04-15 02:22:49,376 INFO L226 Difference]: Without dead ends: 1154 [2021-04-15 02:22:49,376 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:49,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-04-15 02:22:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 998. [2021-04-15 02:22:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2367101303911734) internal successors, (3227), 997 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3227 transitions. [2021-04-15 02:22:49,390 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3227 transitions. Word has length 20 [2021-04-15 02:22:49,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:49,391 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 3227 transitions. [2021-04-15 02:22:49,391 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) [2021-04-15 02:22:49,391 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3227 transitions. [2021-04-15 02:22:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:49,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:49,393 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:49,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-04-15 02:22:49,601 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1593626074, now seen corresponding path program 68 times [2021-04-15 02:22:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:49,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875929008] [2021-04-15 02:22:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:49,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875929008] [2021-04-15 02:22:49,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307890198] [2021-04-15 02:22:49,667 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 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 [2021-04-15 02:22:49,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:49,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:49,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:49,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:49,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:49,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051989865] [2021-04-15 02:22:49,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:49,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:49,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:49,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:49,723 INFO L87 Difference]: Start difference. First operand 998 states and 3227 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) [2021-04-15 02:22:49,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:49,776 INFO L93 Difference]: Finished difference Result 1269 states and 3667 transitions. [2021-04-15 02:22:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:49,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:49,779 INFO L225 Difference]: With dead ends: 1269 [2021-04-15 02:22:49,779 INFO L226 Difference]: Without dead ends: 1269 [2021-04-15 02:22:49,779 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:49,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-04-15 02:22:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1001. [2021-04-15 02:22:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.236) internal successors, (3236), 1000 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3236 transitions. [2021-04-15 02:22:49,791 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3236 transitions. Word has length 20 [2021-04-15 02:22:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:49,792 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3236 transitions. [2021-04-15 02:22:49,792 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) [2021-04-15 02:22:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3236 transitions. [2021-04-15 02:22:49,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:49,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:49,793 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:49,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:49,994 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash -805431499, now seen corresponding path program 69 times [2021-04-15 02:22:49,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:49,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617975538] [2021-04-15 02:22:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:50,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617975538] [2021-04-15 02:22:50,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637855101] [2021-04-15 02:22:50,059 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 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 [2021-04-15 02:22:50,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:50,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:50,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:50,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:50,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:50,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944216801] [2021-04-15 02:22:50,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:50,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:50,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:50,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:50,118 INFO L87 Difference]: Start difference. First operand 1001 states and 3236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:50,278 INFO L93 Difference]: Finished difference Result 1102 states and 3382 transitions. [2021-04-15 02:22:50,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:50,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:50,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:50,281 INFO L225 Difference]: With dead ends: 1102 [2021-04-15 02:22:50,281 INFO L226 Difference]: Without dead ends: 1100 [2021-04-15 02:22:50,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-04-15 02:22:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1001. [2021-04-15 02:22:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.232) internal successors, (3232), 1000 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3232 transitions. [2021-04-15 02:22:50,297 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3232 transitions. Word has length 20 [2021-04-15 02:22:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:50,297 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3232 transitions. [2021-04-15 02:22:50,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3232 transitions. [2021-04-15 02:22:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:50,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:50,299 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:50,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:50,520 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:50,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:50,520 INFO L82 PathProgramCache]: Analyzing trace with hash 972293888, now seen corresponding path program 70 times [2021-04-15 02:22:50,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:50,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927153497] [2021-04-15 02:22:50,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927153497] [2021-04-15 02:22:50,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683165716] [2021-04-15 02:22:50,584 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 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 [2021-04-15 02:22:50,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:50,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:50,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:50,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:50,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:50,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:50,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257375674] [2021-04-15 02:22:50,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:50,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:50,647 INFO L87 Difference]: Start difference. First operand 1001 states and 3232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:50,720 INFO L93 Difference]: Finished difference Result 1353 states and 3864 transitions. [2021-04-15 02:22:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:50,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:50,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:50,723 INFO L225 Difference]: With dead ends: 1353 [2021-04-15 02:22:50,723 INFO L226 Difference]: Without dead ends: 1353 [2021-04-15 02:22:50,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-04-15 02:22:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 965. [2021-04-15 02:22:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.2147302904564317) internal successors, (3099), 964 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3099 transitions. [2021-04-15 02:22:50,737 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3099 transitions. Word has length 20 [2021-04-15 02:22:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:50,737 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3099 transitions. [2021-04-15 02:22:50,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3099 transitions. [2021-04-15 02:22:50,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:50,739 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:50,739 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:50,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:50,953 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:50,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:50,953 INFO L82 PathProgramCache]: Analyzing trace with hash 667676149, now seen corresponding path program 71 times [2021-04-15 02:22:50,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:50,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454905752] [2021-04-15 02:22:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:51,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454905752] [2021-04-15 02:22:51,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010508259] [2021-04-15 02:22:51,016 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 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 [2021-04-15 02:22:51,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:51,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:51,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:51,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:51,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:51,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677550920] [2021-04-15 02:22:51,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:51,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:51,083 INFO L87 Difference]: Start difference. First operand 965 states and 3099 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) [2021-04-15 02:22:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:51,186 INFO L93 Difference]: Finished difference Result 1173 states and 3407 transitions. [2021-04-15 02:22:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:22:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:51,194 INFO L225 Difference]: With dead ends: 1173 [2021-04-15 02:22:51,195 INFO L226 Difference]: Without dead ends: 1173 [2021-04-15 02:22:51,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:22:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-04-15 02:22:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 959. [2021-04-15 02:22:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.1920668058455113) internal successors, (3058), 958 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3058 transitions. [2021-04-15 02:22:51,210 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3058 transitions. Word has length 20 [2021-04-15 02:22:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:51,210 INFO L480 AbstractCegarLoop]: Abstraction has 959 states and 3058 transitions. [2021-04-15 02:22:51,210 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) [2021-04-15 02:22:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3058 transitions. [2021-04-15 02:22:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:51,212 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:51,212 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:51,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:51,425 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1750966282, now seen corresponding path program 72 times [2021-04-15 02:22:51,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:51,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279508229] [2021-04-15 02:22:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:51,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:51,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279508229] [2021-04-15 02:22:51,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877354015] [2021-04-15 02:22:51,486 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 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 [2021-04-15 02:22:51,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:51,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:51,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:51,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:51,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:51,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5394515] [2021-04-15 02:22:51,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:51,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:51,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:51,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:51,555 INFO L87 Difference]: Start difference. First operand 959 states and 3058 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) [2021-04-15 02:22:51,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:51,707 INFO L93 Difference]: Finished difference Result 1173 states and 3381 transitions. [2021-04-15 02:22:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:51,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:51,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:51,710 INFO L225 Difference]: With dead ends: 1173 [2021-04-15 02:22:51,710 INFO L226 Difference]: Without dead ends: 1171 [2021-04-15 02:22:51,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:51,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-04-15 02:22:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 971. [2021-04-15 02:22:51,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.193814432989691) internal successors, (3098), 970 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3098 transitions. [2021-04-15 02:22:51,722 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3098 transitions. Word has length 20 [2021-04-15 02:22:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:51,722 INFO L480 AbstractCegarLoop]: Abstraction has 971 states and 3098 transitions. [2021-04-15 02:22:51,722 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) [2021-04-15 02:22:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3098 transitions. [2021-04-15 02:22:51,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:51,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:51,723 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:51,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:51,924 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:51,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1887198837, now seen corresponding path program 73 times [2021-04-15 02:22:51,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:51,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153403105] [2021-04-15 02:22:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:51,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153403105] [2021-04-15 02:22:51,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913946413] [2021-04-15 02:22:51,981 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 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 [2021-04-15 02:22:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:52,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:52,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:52,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:52,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741450819] [2021-04-15 02:22:52,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:52,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:52,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:52,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:52,032 INFO L87 Difference]: Start difference. First operand 971 states and 3098 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) [2021-04-15 02:22:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:52,162 INFO L93 Difference]: Finished difference Result 1115 states and 3298 transitions. [2021-04-15 02:22:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:52,165 INFO L225 Difference]: With dead ends: 1115 [2021-04-15 02:22:52,165 INFO L226 Difference]: Without dead ends: 1113 [2021-04-15 02:22:52,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-04-15 02:22:52,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 965. [2021-04-15 02:22:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.1898340248962658) internal successors, (3075), 964 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3075 transitions. [2021-04-15 02:22:52,181 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3075 transitions. Word has length 20 [2021-04-15 02:22:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:52,181 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3075 transitions. [2021-04-15 02:22:52,181 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) [2021-04-15 02:22:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3075 transitions. [2021-04-15 02:22:52,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:52,183 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:52,183 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:52,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-04-15 02:22:52,404 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -964780104, now seen corresponding path program 74 times [2021-04-15 02:22:52,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:52,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250828617] [2021-04-15 02:22:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250828617] [2021-04-15 02:22:52,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83568131] [2021-04-15 02:22:52,469 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 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 [2021-04-15 02:22:52,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:52,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:52,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:52,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:52,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:52,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908380695] [2021-04-15 02:22:52,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:52,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:52,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:52,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:52,535 INFO L87 Difference]: Start difference. First operand 965 states and 3075 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) [2021-04-15 02:22:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:52,586 INFO L93 Difference]: Finished difference Result 1233 states and 3507 transitions. [2021-04-15 02:22:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:52,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:52,588 INFO L225 Difference]: With dead ends: 1233 [2021-04-15 02:22:52,588 INFO L226 Difference]: Without dead ends: 1233 [2021-04-15 02:22:52,588 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-04-15 02:22:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 967. [2021-04-15 02:22:52,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.18944099378882) internal successors, (3081), 966 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3081 transitions. [2021-04-15 02:22:52,603 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3081 transitions. Word has length 20 [2021-04-15 02:22:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:52,603 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3081 transitions. [2021-04-15 02:22:52,603 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) [2021-04-15 02:22:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3081 transitions. [2021-04-15 02:22:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:52,605 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:52,605 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:52,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3272,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:52,826 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:52,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:52,826 INFO L82 PathProgramCache]: Analyzing trace with hash -176585529, now seen corresponding path program 75 times [2021-04-15 02:22:52,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:52,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681107879] [2021-04-15 02:22:52,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681107879] [2021-04-15 02:22:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376829229] [2021-04-15 02:22:52,906 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:52,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:52,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:52,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:52,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:52,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:52,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:52,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233289368] [2021-04-15 02:22:52,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:52,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:52,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:52,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:52,980 INFO L87 Difference]: Start difference. First operand 967 states and 3081 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:53,136 INFO L93 Difference]: Finished difference Result 1112 states and 3285 transitions. [2021-04-15 02:22:53,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:22:53,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:53,138 INFO L225 Difference]: With dead ends: 1112 [2021-04-15 02:22:53,138 INFO L226 Difference]: Without dead ends: 1110 [2021-04-15 02:22:53,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:53,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-04-15 02:22:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 967. [2021-04-15 02:22:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.1853002070393375) internal successors, (3077), 966 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3077 transitions. [2021-04-15 02:22:53,153 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3077 transitions. Word has length 20 [2021-04-15 02:22:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:53,153 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3077 transitions. [2021-04-15 02:22:53,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3077 transitions. [2021-04-15 02:22:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:53,155 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:53,155 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:53,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-04-15 02:22:53,365 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:53,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:53,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1601139858, now seen corresponding path program 76 times [2021-04-15 02:22:53,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:53,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222975245] [2021-04-15 02:22:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222975245] [2021-04-15 02:22:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877546830] [2021-04-15 02:22:53,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:22:53,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:53,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:53,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:53,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:53,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:53,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144770229] [2021-04-15 02:22:53,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:53,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:53,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:53,509 INFO L87 Difference]: Start difference. First operand 967 states and 3077 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:53,596 INFO L93 Difference]: Finished difference Result 1326 states and 3712 transitions. [2021-04-15 02:22:53,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:53,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:53,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:53,598 INFO L225 Difference]: With dead ends: 1326 [2021-04-15 02:22:53,598 INFO L226 Difference]: Without dead ends: 1326 [2021-04-15 02:22:53,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-04-15 02:22:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 938. [2021-04-15 02:22:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.1643543223052295) internal successors, (2965), 937 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2965 transitions. [2021-04-15 02:22:53,615 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2965 transitions. Word has length 20 [2021-04-15 02:22:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:53,615 INFO L480 AbstractCegarLoop]: Abstraction has 938 states and 2965 transitions. [2021-04-15 02:22:53,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2965 transitions. [2021-04-15 02:22:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:53,617 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:53,617 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:53,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-04-15 02:22:53,834 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1312819467, now seen corresponding path program 77 times [2021-04-15 02:22:53,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:53,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993844789] [2021-04-15 02:22:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993844789] [2021-04-15 02:22:53,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023043242] [2021-04-15 02:22:53,899 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 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 [2021-04-15 02:22:53,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:53,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:53,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:53,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:53,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:53,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:53,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813426704] [2021-04-15 02:22:53,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:53,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:53,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:53,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:53,964 INFO L87 Difference]: Start difference. First operand 938 states and 2965 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:54,106 INFO L93 Difference]: Finished difference Result 1106 states and 3370 transitions. [2021-04-15 02:22:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:54,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:54,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:54,108 INFO L225 Difference]: With dead ends: 1106 [2021-04-15 02:22:54,108 INFO L226 Difference]: Without dead ends: 1103 [2021-04-15 02:22:54,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:54,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-04-15 02:22:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 941. [2021-04-15 02:22:54,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.1638297872340426) internal successors, (2974), 940 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2974 transitions. [2021-04-15 02:22:54,123 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2974 transitions. Word has length 20 [2021-04-15 02:22:54,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:54,124 INFO L480 AbstractCegarLoop]: Abstraction has 941 states and 2974 transitions. [2021-04-15 02:22:54,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,124 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2974 transitions. [2021-04-15 02:22:54,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:54,125 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:54,125 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:54,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-04-15 02:22:54,346 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash -459719944, now seen corresponding path program 78 times [2021-04-15 02:22:54,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:54,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552144228] [2021-04-15 02:22:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552144228] [2021-04-15 02:22:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837080669] [2021-04-15 02:22:54,413 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:54,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:22:54,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:54,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:54,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:54,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:54,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:54,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42365929] [2021-04-15 02:22:54,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:54,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:54,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:54,494 INFO L87 Difference]: Start difference. First operand 941 states and 2974 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:54,613 INFO L93 Difference]: Finished difference Result 1725 states and 5166 transitions. [2021-04-15 02:22:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:22:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:54,617 INFO L225 Difference]: With dead ends: 1725 [2021-04-15 02:22:54,617 INFO L226 Difference]: Without dead ends: 1725 [2021-04-15 02:22:54,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:22:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-04-15 02:22:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1284. [2021-04-15 02:22:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3265783320342948) internal successors, (4268), 1283 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4268 transitions. [2021-04-15 02:22:54,640 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4268 transitions. Word has length 20 [2021-04-15 02:22:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:54,640 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 4268 transitions. [2021-04-15 02:22:54,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4268 transitions. [2021-04-15 02:22:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:54,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:54,643 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:54,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-04-15 02:22:54,865 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:54,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:54,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1312935261, now seen corresponding path program 79 times [2021-04-15 02:22:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:54,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800608478] [2021-04-15 02:22:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:54,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:54,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800608478] [2021-04-15 02:22:54,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093054443] [2021-04-15 02:22:54,927 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 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 [2021-04-15 02:22:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:54,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:54,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72280406] [2021-04-15 02:22:54,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:54,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:54,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:54,985 INFO L87 Difference]: Start difference. First operand 1284 states and 4268 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) [2021-04-15 02:22:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:55,077 INFO L93 Difference]: Finished difference Result 1481 states and 4527 transitions. [2021-04-15 02:22:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:55,081 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:55,083 INFO L225 Difference]: With dead ends: 1481 [2021-04-15 02:22:55,083 INFO L226 Difference]: Without dead ends: 1481 [2021-04-15 02:22:55,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-04-15 02:22:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1264. [2021-04-15 02:22:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.28978622327791) internal successors, (4155), 1263 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4155 transitions. [2021-04-15 02:22:55,106 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4155 transitions. Word has length 20 [2021-04-15 02:22:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:55,106 INFO L480 AbstractCegarLoop]: Abstraction has 1264 states and 4155 transitions. [2021-04-15 02:22:55,106 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) [2021-04-15 02:22:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4155 transitions. [2021-04-15 02:22:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:55,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:55,108 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:55,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:55,325 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:55,325 INFO L82 PathProgramCache]: Analyzing trace with hash -229645128, now seen corresponding path program 80 times [2021-04-15 02:22:55,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:55,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786387985] [2021-04-15 02:22:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:55,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786387985] [2021-04-15 02:22:55,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206403865] [2021-04-15 02:22:55,381 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 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 [2021-04-15 02:22:55,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:55,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:55,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:55,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:55,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:55,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:55,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519275306] [2021-04-15 02:22:55,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:55,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:55,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:55,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:55,431 INFO L87 Difference]: Start difference. First operand 1264 states and 4155 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) [2021-04-15 02:22:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:55,561 INFO L93 Difference]: Finished difference Result 1495 states and 4548 transitions. [2021-04-15 02:22:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:55,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:55,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:55,562 INFO L225 Difference]: With dead ends: 1495 [2021-04-15 02:22:55,563 INFO L226 Difference]: Without dead ends: 1493 [2021-04-15 02:22:55,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:55,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-04-15 02:22:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1297. [2021-04-15 02:22:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2916666666666665) internal successors, (4266), 1296 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4266 transitions. [2021-04-15 02:22:55,577 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4266 transitions. Word has length 20 [2021-04-15 02:22:55,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:55,577 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4266 transitions. [2021-04-15 02:22:55,577 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) [2021-04-15 02:22:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4266 transitions. [2021-04-15 02:22:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:55,579 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:55,579 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:55,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:55,779 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:55,780 INFO L82 PathProgramCache]: Analyzing trace with hash 427157049, now seen corresponding path program 81 times [2021-04-15 02:22:55,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:55,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600045949] [2021-04-15 02:22:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:55,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600045949] [2021-04-15 02:22:55,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275200486] [2021-04-15 02:22:55,837 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 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 [2021-04-15 02:22:55,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:55,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 02:22:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:55,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:55,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-04-15 02:22:55,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604616758] [2021-04-15 02:22:55,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 02:22:55,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 02:22:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:22:55,988 INFO L87 Difference]: Start difference. First operand 1297 states and 4266 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) [2021-04-15 02:22:56,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:56,853 INFO L93 Difference]: Finished difference Result 2116 states and 6354 transitions. [2021-04-15 02:22:56,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-04-15 02:22:56,854 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 [2021-04-15 02:22:56,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:56,856 INFO L225 Difference]: With dead ends: 2116 [2021-04-15 02:22:56,856 INFO L226 Difference]: Without dead ends: 2110 [2021-04-15 02:22:56,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 678.6ms TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2021-04-15 02:22:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-04-15 02:22:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1671. [2021-04-15 02:22:56,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.2149700598802395) internal successors, (5369), 1670 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5369 transitions. [2021-04-15 02:22:56,878 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5369 transitions. Word has length 20 [2021-04-15 02:22:56,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:56,878 INFO L480 AbstractCegarLoop]: Abstraction has 1671 states and 5369 transitions. [2021-04-15 02:22:56,878 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) [2021-04-15 02:22:56,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5369 transitions. [2021-04-15 02:22:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:56,881 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:56,881 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:57,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:57,097 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:57,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:57,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1349575782, now seen corresponding path program 82 times [2021-04-15 02:22:57,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:57,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186422381] [2021-04-15 02:22:57,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186422381] [2021-04-15 02:22:57,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081155075] [2021-04-15 02:22:57,155 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:57,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:22:57,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:57,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:57,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:57,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:57,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761693885] [2021-04-15 02:22:57,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:57,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:57,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:57,237 INFO L87 Difference]: Start difference. First operand 1671 states and 5369 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) [2021-04-15 02:22:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:57,301 INFO L93 Difference]: Finished difference Result 1971 states and 5778 transitions. [2021-04-15 02:22:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:22:57,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:57,304 INFO L225 Difference]: With dead ends: 1971 [2021-04-15 02:22:57,304 INFO L226 Difference]: Without dead ends: 1971 [2021-04-15 02:22:57,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-04-15 02:22:57,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1669. [2021-04-15 02:22:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.2044364508393284) internal successors, (5345), 1668 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5345 transitions. [2021-04-15 02:22:57,333 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5345 transitions. Word has length 20 [2021-04-15 02:22:57,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:57,334 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 5345 transitions. [2021-04-15 02:22:57,334 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) [2021-04-15 02:22:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5345 transitions. [2021-04-15 02:22:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:57,336 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:57,336 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:57,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3280,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:57,558 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:57,558 INFO L82 PathProgramCache]: Analyzing trace with hash -379471552, now seen corresponding path program 83 times [2021-04-15 02:22:57,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:57,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410265994] [2021-04-15 02:22:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:57,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410265994] [2021-04-15 02:22:57,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234641607] [2021-04-15 02:22:57,620 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 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 [2021-04-15 02:22:57,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:22:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:57,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:57,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:57,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:57,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854822966] [2021-04-15 02:22:57,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:57,697 INFO L87 Difference]: Start difference. First operand 1669 states and 5345 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:57,793 INFO L93 Difference]: Finished difference Result 2070 states and 5985 transitions. [2021-04-15 02:22:57,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:57,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:57,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:57,797 INFO L225 Difference]: With dead ends: 2070 [2021-04-15 02:22:57,797 INFO L226 Difference]: Without dead ends: 2070 [2021-04-15 02:22:57,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:22:57,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-04-15 02:22:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1581. [2021-04-15 02:22:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1848101265822786) internal successors, (5032), 1580 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5032 transitions. [2021-04-15 02:22:57,827 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5032 transitions. Word has length 20 [2021-04-15 02:22:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:57,827 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5032 transitions. [2021-04-15 02:22:57,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:57,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5032 transitions. [2021-04-15 02:22:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:57,831 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:57,831 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:58,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3281 [2021-04-15 02:22:58,049 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1854635942, now seen corresponding path program 84 times [2021-04-15 02:22:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:58,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248204671] [2021-04-15 02:22:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248204671] [2021-04-15 02:22:58,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607684397] [2021-04-15 02:22:58,111 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:58,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:22:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:58,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558427745] [2021-04-15 02:22:58,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:58,193 INFO L87 Difference]: Start difference. First operand 1581 states and 5032 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:58,294 INFO L93 Difference]: Finished difference Result 2650 states and 8050 transitions. [2021-04-15 02:22:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:22:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:58,299 INFO L225 Difference]: With dead ends: 2650 [2021-04-15 02:22:58,299 INFO L226 Difference]: Without dead ends: 2650 [2021-04-15 02:22:58,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:22:58,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-04-15 02:22:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2152. [2021-04-15 02:22:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3170618317061833) internal successors, (7135), 2151 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7135 transitions. [2021-04-15 02:22:58,336 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7135 transitions. Word has length 20 [2021-04-15 02:22:58,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:58,337 INFO L480 AbstractCegarLoop]: Abstraction has 2152 states and 7135 transitions. [2021-04-15 02:22:58,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7135 transitions. [2021-04-15 02:22:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:58,340 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:58,340 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:58,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:58,562 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1902475776, now seen corresponding path program 85 times [2021-04-15 02:22:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:58,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547602391] [2021-04-15 02:22:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547602391] [2021-04-15 02:22:58,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029745830] [2021-04-15 02:22:58,625 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:58,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:58,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:22:58,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319324882] [2021-04-15 02:22:58,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:22:58,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:58,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:22:58,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:58,686 INFO L87 Difference]: Start difference. First operand 2152 states and 7135 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:58,840 INFO L93 Difference]: Finished difference Result 3538 states and 11103 transitions. [2021-04-15 02:22:58,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:22:58,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:58,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:58,845 INFO L225 Difference]: With dead ends: 3538 [2021-04-15 02:22:58,845 INFO L226 Difference]: Without dead ends: 3538 [2021-04-15 02:22:58,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:22:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-04-15 02:22:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2878. [2021-04-15 02:22:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.397636426833507) internal successors, (9775), 2877 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 9775 transitions. [2021-04-15 02:22:58,881 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 9775 transitions. Word has length 20 [2021-04-15 02:22:58,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:58,881 INFO L480 AbstractCegarLoop]: Abstraction has 2878 states and 9775 transitions. [2021-04-15 02:22:58,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:58,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 9775 transitions. [2021-04-15 02:22:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:58,884 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:58,884 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:59,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-04-15 02:22:59,084 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1499056694, now seen corresponding path program 86 times [2021-04-15 02:22:59,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:59,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231521572] [2021-04-15 02:22:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:59,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:22:59,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231521572] [2021-04-15 02:22:59,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434794962] [2021-04-15 02:22:59,142 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:22:59,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:22:59,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:22:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:59,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:59,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:59,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194476767] [2021-04-15 02:22:59,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:59,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:59,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:59,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:59,223 INFO L87 Difference]: Start difference. First operand 2878 states and 9775 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) [2021-04-15 02:22:59,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:59,383 INFO L93 Difference]: Finished difference Result 3252 states and 10560 transitions. [2021-04-15 02:22:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:22:59,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:59,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:59,389 INFO L225 Difference]: With dead ends: 3252 [2021-04-15 02:22:59,390 INFO L226 Difference]: Without dead ends: 3250 [2021-04-15 02:22:59,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:22:59,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-04-15 02:22:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3003. [2021-04-15 02:22:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.389407061958694) internal successors, (10175), 3002 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10175 transitions. [2021-04-15 02:22:59,450 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10175 transitions. Word has length 20 [2021-04-15 02:22:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:59,451 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 10175 transitions. [2021-04-15 02:22:59,451 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) [2021-04-15 02:22:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10175 transitions. [2021-04-15 02:22:59,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:59,455 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:59,455 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:22:59,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-04-15 02:22:59,669 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:22:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:22:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 80164216, now seen corresponding path program 87 times [2021-04-15 02:22:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:22:59,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026378673] [2021-04-15 02:22:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:22:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:22:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:59,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026378673] [2021-04-15 02:22:59,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552677342] [2021-04-15 02:22:59,725 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 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 [2021-04-15 02:22:59,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:22:59,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:22:59,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:22:59,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:22:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:22:59,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:22:59,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:22:59,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516004308] [2021-04-15 02:22:59,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:22:59,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:22:59,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:22:59,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:22:59,795 INFO L87 Difference]: Start difference. First operand 3003 states and 10175 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) [2021-04-15 02:22:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:22:59,881 INFO L93 Difference]: Finished difference Result 3239 states and 10385 transitions. [2021-04-15 02:22:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:22:59,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:22:59,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:22:59,887 INFO L225 Difference]: With dead ends: 3239 [2021-04-15 02:22:59,887 INFO L226 Difference]: Without dead ends: 3239 [2021-04-15 02:22:59,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:22:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-04-15 02:22:59,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2935. [2021-04-15 02:22:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3677573278800272) internal successors, (9881), 2934 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:22:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9881 transitions. [2021-04-15 02:22:59,943 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9881 transitions. Word has length 20 [2021-04-15 02:22:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:22:59,943 INFO L480 AbstractCegarLoop]: Abstraction has 2935 states and 9881 transitions. [2021-04-15 02:22:59,943 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) [2021-04-15 02:22:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9881 transitions. [2021-04-15 02:22:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:22:59,947 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:22:59,947 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:00,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3285,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:00,165 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:00,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:00,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1648883118, now seen corresponding path program 88 times [2021-04-15 02:23:00,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:00,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754911741] [2021-04-15 02:23:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:00,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754911741] [2021-04-15 02:23:00,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53404776] [2021-04-15 02:23:00,228 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 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 [2021-04-15 02:23:00,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:00,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:00,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:00,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:00,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:00,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477181943] [2021-04-15 02:23:00,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:00,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:00,286 INFO L87 Difference]: Start difference. First operand 2935 states and 9881 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:00,366 INFO L93 Difference]: Finished difference Result 3341 states and 10608 transitions. [2021-04-15 02:23:00,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:23:00,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:00,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:00,370 INFO L225 Difference]: With dead ends: 3341 [2021-04-15 02:23:00,370 INFO L226 Difference]: Without dead ends: 3341 [2021-04-15 02:23:00,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:00,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-04-15 02:23:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2802. [2021-04-15 02:23:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.3491610139235988) internal successors, (9381), 2801 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9381 transitions. [2021-04-15 02:23:00,404 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9381 transitions. Word has length 20 [2021-04-15 02:23:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:00,404 INFO L480 AbstractCegarLoop]: Abstraction has 2802 states and 9381 transitions. [2021-04-15 02:23:00,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9381 transitions. [2021-04-15 02:23:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:00,406 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:00,407 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:00,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3286,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:00,607 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:00,607 INFO L82 PathProgramCache]: Analyzing trace with hash 585224376, now seen corresponding path program 89 times [2021-04-15 02:23:00,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:00,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483764521] [2021-04-15 02:23:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:00,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483764521] [2021-04-15 02:23:00,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394728575] [2021-04-15 02:23:00,680 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 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 [2021-04-15 02:23:00,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:00,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:00,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:00,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:00,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:00,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008577962] [2021-04-15 02:23:00,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:00,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:00,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:00,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:00,738 INFO L87 Difference]: Start difference. First operand 2802 states and 9381 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:00,830 INFO L93 Difference]: Finished difference Result 4613 states and 15295 transitions. [2021-04-15 02:23:00,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:23:00,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:00,838 INFO L225 Difference]: With dead ends: 4613 [2021-04-15 02:23:00,838 INFO L226 Difference]: Without dead ends: 4613 [2021-04-15 02:23:00,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:00,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-04-15 02:23:00,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4212. [2021-04-15 02:23:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 3.4713844692472096) internal successors, (14618), 4211 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 14618 transitions. [2021-04-15 02:23:00,903 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 14618 transitions. Word has length 20 [2021-04-15 02:23:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:00,903 INFO L480 AbstractCegarLoop]: Abstraction has 4212 states and 14618 transitions. [2021-04-15 02:23:00,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 14618 transitions. [2021-04-15 02:23:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:00,907 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:00,907 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:01,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-04-15 02:23:01,108 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:01,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1123079954, now seen corresponding path program 90 times [2021-04-15 02:23:01,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:01,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615365335] [2021-04-15 02:23:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615365335] [2021-04-15 02:23:01,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695554715] [2021-04-15 02:23:01,167 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 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 [2021-04-15 02:23:01,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:01,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:01,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:01,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:01,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:01,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865650456] [2021-04-15 02:23:01,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:01,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:01,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:01,232 INFO L87 Difference]: Start difference. First operand 4212 states and 14618 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:01,352 INFO L93 Difference]: Finished difference Result 5440 states and 18349 transitions. [2021-04-15 02:23:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:23:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:01,359 INFO L225 Difference]: With dead ends: 5440 [2021-04-15 02:23:01,359 INFO L226 Difference]: Without dead ends: 5440 [2021-04-15 02:23:01,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-04-15 02:23:01,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5067. [2021-04-15 02:23:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.5063166206079748) internal successors, (17763), 5066 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 17763 transitions. [2021-04-15 02:23:01,432 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 17763 transitions. Word has length 20 [2021-04-15 02:23:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:01,432 INFO L480 AbstractCegarLoop]: Abstraction has 5067 states and 17763 transitions. [2021-04-15 02:23:01,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 17763 transitions. [2021-04-15 02:23:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:01,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:01,436 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:01,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:01,637 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash 616733688, now seen corresponding path program 91 times [2021-04-15 02:23:01,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:01,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578111859] [2021-04-15 02:23:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578111859] [2021-04-15 02:23:01,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606904731] [2021-04-15 02:23:01,697 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 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 [2021-04-15 02:23:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:01,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:01,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:01,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:01,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:01,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548631102] [2021-04-15 02:23:01,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:01,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:01,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:01,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:01,757 INFO L87 Difference]: Start difference. First operand 5067 states and 17763 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:01,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:01,952 INFO L93 Difference]: Finished difference Result 6110 states and 20625 transitions. [2021-04-15 02:23:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:01,961 INFO L225 Difference]: With dead ends: 6110 [2021-04-15 02:23:01,961 INFO L226 Difference]: Without dead ends: 6110 [2021-04-15 02:23:01,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2021-04-15 02:23:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5618. [2021-04-15 02:23:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.5143314936799004) internal successors, (19740), 5617 states have internal predecessors, (19740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 19740 transitions. [2021-04-15 02:23:02,043 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 19740 transitions. Word has length 20 [2021-04-15 02:23:02,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:02,043 INFO L480 AbstractCegarLoop]: Abstraction has 5618 states and 19740 transitions. [2021-04-15 02:23:02,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 19740 transitions. [2021-04-15 02:23:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:02,047 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:02,047 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:02,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3289,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:02,248 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2093644800, now seen corresponding path program 92 times [2021-04-15 02:23:02,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:02,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338312679] [2021-04-15 02:23:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338312679] [2021-04-15 02:23:02,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728029797] [2021-04-15 02:23:02,297 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 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 [2021-04-15 02:23:02,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:02,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:02,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:02,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:23:02,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:02,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-04-15 02:23:02,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452506312] [2021-04-15 02:23:02,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 02:23:02,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:02,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 02:23:02,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:23:02,397 INFO L87 Difference]: Start difference. First operand 5618 states and 19740 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:02,573 INFO L93 Difference]: Finished difference Result 7038 states and 24489 transitions. [2021-04-15 02:23:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:02,586 INFO L225 Difference]: With dead ends: 7038 [2021-04-15 02:23:02,586 INFO L226 Difference]: Without dead ends: 7034 [2021-04-15 02:23:02,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-04-15 02:23:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6840. [2021-04-15 02:23:02,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.5451089340546864) internal successors, (24245), 6839 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 24245 transitions. [2021-04-15 02:23:02,716 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 24245 transitions. Word has length 20 [2021-04-15 02:23:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:02,716 INFO L480 AbstractCegarLoop]: Abstraction has 6840 states and 24245 transitions. [2021-04-15 02:23:02,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 24245 transitions. [2021-04-15 02:23:02,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:02,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:02,721 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:02,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-04-15 02:23:02,922 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:02,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:02,922 INFO L82 PathProgramCache]: Analyzing trace with hash 178840000, now seen corresponding path program 93 times [2021-04-15 02:23:02,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:02,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748653179] [2021-04-15 02:23:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:02,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748653179] [2021-04-15 02:23:02,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091646679] [2021-04-15 02:23:02,976 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 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 [2021-04-15 02:23:02,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:02,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:23:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842051789] [2021-04-15 02:23:03,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:23:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:23:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:23:03,038 INFO L87 Difference]: Start difference. First operand 6840 states and 24245 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:03,165 INFO L93 Difference]: Finished difference Result 7707 states and 26447 transitions. [2021-04-15 02:23:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:03,177 INFO L225 Difference]: With dead ends: 7707 [2021-04-15 02:23:03,177 INFO L226 Difference]: Without dead ends: 7707 [2021-04-15 02:23:03,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:03,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-04-15 02:23:03,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7206. [2021-04-15 02:23:03,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.5443442054129077) internal successors, (25537), 7205 states have internal predecessors, (25537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 25537 transitions. [2021-04-15 02:23:03,290 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 25537 transitions. Word has length 20 [2021-04-15 02:23:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:03,290 INFO L480 AbstractCegarLoop]: Abstraction has 7206 states and 25537 transitions. [2021-04-15 02:23:03,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 25537 transitions. [2021-04-15 02:23:03,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:03,296 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:03,296 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:03,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:03,501 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -327506266, now seen corresponding path program 94 times [2021-04-15 02:23:03,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:03,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264189464] [2021-04-15 02:23:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264189464] [2021-04-15 02:23:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773446834] [2021-04-15 02:23:03,573 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:23:03,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:03,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:03,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:03,650 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:03,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:03,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:03,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307483874] [2021-04-15 02:23:03,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:03,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:03,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:03,651 INFO L87 Difference]: Start difference. First operand 7206 states and 25537 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:03,802 INFO L93 Difference]: Finished difference Result 8954 states and 30890 transitions. [2021-04-15 02:23:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:03,803 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:03,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:03,820 INFO L225 Difference]: With dead ends: 8954 [2021-04-15 02:23:03,820 INFO L226 Difference]: Without dead ends: 8954 [2021-04-15 02:23:03,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2021-04-15 02:23:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 8254. [2021-04-15 02:23:03,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 3.561008118260027) internal successors, (29389), 8253 states have internal predecessors, (29389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 29389 transitions. [2021-04-15 02:23:03,968 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 29389 transitions. Word has length 20 [2021-04-15 02:23:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:03,968 INFO L480 AbstractCegarLoop]: Abstraction has 8254 states and 29389 transitions. [2021-04-15 02:23:03,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 29389 transitions. [2021-04-15 02:23:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:03,974 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:03,974 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:04,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3292,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:04,174 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash 210349312, now seen corresponding path program 95 times [2021-04-15 02:23:04,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:04,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983978270] [2021-04-15 02:23:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:04,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983978270] [2021-04-15 02:23:04,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430392479] [2021-04-15 02:23:04,238 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 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 [2021-04-15 02:23:04,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:04,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:04,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:04,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:04,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999024859] [2021-04-15 02:23:04,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:04,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:04,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:04,308 INFO L87 Difference]: Start difference. First operand 8254 states and 29389 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:04,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:04,494 INFO L93 Difference]: Finished difference Result 9105 states and 31585 transitions. [2021-04-15 02:23:04,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:04,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:04,507 INFO L225 Difference]: With dead ends: 9105 [2021-04-15 02:23:04,507 INFO L226 Difference]: Without dead ends: 9105 [2021-04-15 02:23:04,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-04-15 02:23:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 8656. [2021-04-15 02:23:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 3.5648757943385325) internal successors, (30854), 8655 states have internal predecessors, (30854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:04,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30854 transitions. [2021-04-15 02:23:04,672 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30854 transitions. Word has length 20 [2021-04-15 02:23:04,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:04,672 INFO L480 AbstractCegarLoop]: Abstraction has 8656 states and 30854 transitions. [2021-04-15 02:23:04,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:04,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30854 transitions. [2021-04-15 02:23:04,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:04,677 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:04,677 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:04,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3293 [2021-04-15 02:23:04,877 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:04,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1155628672, now seen corresponding path program 96 times [2021-04-15 02:23:04,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:04,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133099180] [2021-04-15 02:23:04,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133099180] [2021-04-15 02:23:04,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59232654] [2021-04-15 02:23:04,939 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 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 [2021-04-15 02:23:05,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:05,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:05,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:05,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:05,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:05,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350826783] [2021-04-15 02:23:05,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:05,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:05,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:05,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:05,071 INFO L87 Difference]: Start difference. First operand 8656 states and 30854 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:05,216 INFO L93 Difference]: Finished difference Result 9529 states and 33025 transitions. [2021-04-15 02:23:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:05,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:05,235 INFO L225 Difference]: With dead ends: 9529 [2021-04-15 02:23:05,236 INFO L226 Difference]: Without dead ends: 9529 [2021-04-15 02:23:05,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-04-15 02:23:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4249. [2021-04-15 02:23:05,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 3.398069679849341) internal successors, (14435), 4248 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 14435 transitions. [2021-04-15 02:23:05,332 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 14435 transitions. Word has length 20 [2021-04-15 02:23:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:05,332 INFO L480 AbstractCegarLoop]: Abstraction has 4249 states and 14435 transitions. [2021-04-15 02:23:05,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 14435 transitions. [2021-04-15 02:23:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:05,337 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:05,337 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:05,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3294 [2021-04-15 02:23:05,541 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:05,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:05,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1693484250, now seen corresponding path program 97 times [2021-04-15 02:23:05,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:05,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974015726] [2021-04-15 02:23:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:05,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974015726] [2021-04-15 02:23:05,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800495911] [2021-04-15 02:23:05,604 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 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 [2021-04-15 02:23:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:05,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:05,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:05,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298167682] [2021-04-15 02:23:05,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:05,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:05,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:05,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:05,662 INFO L87 Difference]: Start difference. First operand 4249 states and 14435 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:05,788 INFO L93 Difference]: Finished difference Result 5911 states and 19624 transitions. [2021-04-15 02:23:05,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:23:05,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:05,797 INFO L225 Difference]: With dead ends: 5911 [2021-04-15 02:23:05,797 INFO L226 Difference]: Without dead ends: 5911 [2021-04-15 02:23:05,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-04-15 02:23:05,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4539. [2021-04-15 02:23:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.4169237549581313) internal successors, (15506), 4538 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 15506 transitions. [2021-04-15 02:23:05,883 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 15506 transitions. Word has length 20 [2021-04-15 02:23:05,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:05,883 INFO L480 AbstractCegarLoop]: Abstraction has 4539 states and 15506 transitions. [2021-04-15 02:23:05,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 15506 transitions. [2021-04-15 02:23:05,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:05,888 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:05,888 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:06,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3295,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:06,100 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:06,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:06,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1187137984, now seen corresponding path program 98 times [2021-04-15 02:23:06,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:06,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057514757] [2021-04-15 02:23:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:06,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:06,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057514757] [2021-04-15 02:23:06,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115693173] [2021-04-15 02:23:06,158 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:06,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:06,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:06,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:06,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:06,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34505041] [2021-04-15 02:23:06,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:06,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:06,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:06,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:06,225 INFO L87 Difference]: Start difference. First operand 4539 states and 15506 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:06,422 INFO L93 Difference]: Finished difference Result 5172 states and 16881 transitions. [2021-04-15 02:23:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:06,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:06,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:06,431 INFO L225 Difference]: With dead ends: 5172 [2021-04-15 02:23:06,432 INFO L226 Difference]: Without dead ends: 5172 [2021-04-15 02:23:06,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-04-15 02:23:06,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4463. [2021-04-15 02:23:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.4195428059166293) internal successors, (15258), 4462 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15258 transitions. [2021-04-15 02:23:06,506 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15258 transitions. Word has length 20 [2021-04-15 02:23:06,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:06,506 INFO L480 AbstractCegarLoop]: Abstraction has 4463 states and 15258 transitions. [2021-04-15 02:23:06,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:06,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15258 transitions. [2021-04-15 02:23:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:06,509 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:06,509 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:06,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-04-15 02:23:06,710 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash 2098857720, now seen corresponding path program 99 times [2021-04-15 02:23:06,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:06,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963733370] [2021-04-15 02:23:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:06,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963733370] [2021-04-15 02:23:06,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216778999] [2021-04-15 02:23:06,760 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 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 [2021-04-15 02:23:06,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:06,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:06,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:06,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:06,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802840784] [2021-04-15 02:23:06,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:06,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:06,817 INFO L87 Difference]: Start difference. First operand 4463 states and 15258 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) [2021-04-15 02:23:06,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:06,960 INFO L93 Difference]: Finished difference Result 4711 states and 15597 transitions. [2021-04-15 02:23:06,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:06,961 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:06,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:06,967 INFO L225 Difference]: With dead ends: 4711 [2021-04-15 02:23:06,967 INFO L226 Difference]: Without dead ends: 4707 [2021-04-15 02:23:06,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-04-15 02:23:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4073. [2021-04-15 02:23:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.394400785854617) internal successors, (13822), 4072 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 13822 transitions. [2021-04-15 02:23:07,025 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 13822 transitions. Word has length 20 [2021-04-15 02:23:07,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:07,025 INFO L480 AbstractCegarLoop]: Abstraction has 4073 states and 13822 transitions. [2021-04-15 02:23:07,025 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) [2021-04-15 02:23:07,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 13822 transitions. [2021-04-15 02:23:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:07,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:07,028 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:07,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-04-15 02:23:07,228 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:07,228 INFO L82 PathProgramCache]: Analyzing trace with hash -616888666, now seen corresponding path program 100 times [2021-04-15 02:23:07,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:07,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097526715] [2021-04-15 02:23:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:07,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097526715] [2021-04-15 02:23:07,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562926183] [2021-04-15 02:23:07,286 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:23:07,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:07,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:07,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:07,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813285458] [2021-04-15 02:23:07,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:07,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:07,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:07,351 INFO L87 Difference]: Start difference. First operand 4073 states and 13822 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) [2021-04-15 02:23:07,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:07,435 INFO L93 Difference]: Finished difference Result 4367 states and 14243 transitions. [2021-04-15 02:23:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:23:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:07,443 INFO L225 Difference]: With dead ends: 4367 [2021-04-15 02:23:07,443 INFO L226 Difference]: Without dead ends: 4367 [2021-04-15 02:23:07,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-04-15 02:23:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4077. [2021-04-15 02:23:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 3.3851815505397447) internal successors, (13798), 4076 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 13798 transitions. [2021-04-15 02:23:07,518 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 13798 transitions. Word has length 20 [2021-04-15 02:23:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:07,518 INFO L480 AbstractCegarLoop]: Abstraction has 4077 states and 13798 transitions. [2021-04-15 02:23:07,518 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) [2021-04-15 02:23:07,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 13798 transitions. [2021-04-15 02:23:07,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:07,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:07,521 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:07,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-04-15 02:23:07,722 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:07,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1949031296, now seen corresponding path program 101 times [2021-04-15 02:23:07,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:07,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719583111] [2021-04-15 02:23:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719583111] [2021-04-15 02:23:07,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75307690] [2021-04-15 02:23:07,783 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 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 [2021-04-15 02:23:07,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:07,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:07,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:07,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:07,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:07,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:07,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976871678] [2021-04-15 02:23:07,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:07,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:07,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:07,893 INFO L87 Difference]: Start difference. First operand 4077 states and 13798 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:07,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:07,976 INFO L93 Difference]: Finished difference Result 4294 states and 13975 transitions. [2021-04-15 02:23:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:07,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:07,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:07,984 INFO L225 Difference]: With dead ends: 4294 [2021-04-15 02:23:07,985 INFO L226 Difference]: Without dead ends: 4294 [2021-04-15 02:23:07,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-04-15 02:23:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3913. [2021-04-15 02:23:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.3785787321063396) internal successors, (13217), 3912 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13217 transitions. [2021-04-15 02:23:08,060 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13217 transitions. Word has length 20 [2021-04-15 02:23:08,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:08,060 INFO L480 AbstractCegarLoop]: Abstraction has 3913 states and 13217 transitions. [2021-04-15 02:23:08,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:08,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13217 transitions. [2021-04-15 02:23:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:08,064 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:08,064 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:08,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3299,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:08,277 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -111828506, now seen corresponding path program 102 times [2021-04-15 02:23:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:08,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181461744] [2021-04-15 02:23:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181461744] [2021-04-15 02:23:08,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74780717] [2021-04-15 02:23:08,334 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 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 [2021-04-15 02:23:08,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:08,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:08,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:08,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083559622] [2021-04-15 02:23:08,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:08,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:08,395 INFO L87 Difference]: Start difference. First operand 3913 states and 13217 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:08,513 INFO L93 Difference]: Finished difference Result 4333 states and 14025 transitions. [2021-04-15 02:23:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:08,518 INFO L225 Difference]: With dead ends: 4333 [2021-04-15 02:23:08,518 INFO L226 Difference]: Without dead ends: 4333 [2021-04-15 02:23:08,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:08,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-04-15 02:23:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3900. [2021-04-15 02:23:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 3.368043087971275) internal successors, (13132), 3899 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 13132 transitions. [2021-04-15 02:23:08,568 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 13132 transitions. Word has length 20 [2021-04-15 02:23:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:08,568 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 13132 transitions. [2021-04-15 02:23:08,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 13132 transitions. [2021-04-15 02:23:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:08,570 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:08,570 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:08,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:08,771 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 426027072, now seen corresponding path program 103 times [2021-04-15 02:23:08,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:08,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964896443] [2021-04-15 02:23:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964896443] [2021-04-15 02:23:08,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673713411] [2021-04-15 02:23:08,831 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 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 [2021-04-15 02:23:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:08,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:08,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:08,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:08,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402932897] [2021-04-15 02:23:08,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:08,896 INFO L87 Difference]: Start difference. First operand 3900 states and 13132 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:09,009 INFO L93 Difference]: Finished difference Result 5075 states and 16651 transitions. [2021-04-15 02:23:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:09,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:09,016 INFO L225 Difference]: With dead ends: 5075 [2021-04-15 02:23:09,017 INFO L226 Difference]: Without dead ends: 5075 [2021-04-15 02:23:09,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-04-15 02:23:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4093. [2021-04-15 02:23:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 3.374144672531769) internal successors, (13807), 4092 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 13807 transitions. [2021-04-15 02:23:09,072 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 13807 transitions. Word has length 20 [2021-04-15 02:23:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:09,072 INFO L480 AbstractCegarLoop]: Abstraction has 4093 states and 13807 transitions. [2021-04-15 02:23:09,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 13807 transitions. [2021-04-15 02:23:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:09,074 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:09,075 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:09,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3301 [2021-04-15 02:23:09,275 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -80319194, now seen corresponding path program 104 times [2021-04-15 02:23:09,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:09,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884144172] [2021-04-15 02:23:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884144172] [2021-04-15 02:23:09,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073630102] [2021-04-15 02:23:09,338 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 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 [2021-04-15 02:23:09,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:09,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:09,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:09,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:09,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:09,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539049079] [2021-04-15 02:23:09,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:09,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:09,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:09,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:09,406 INFO L87 Difference]: Start difference. First operand 4093 states and 13807 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:09,566 INFO L93 Difference]: Finished difference Result 4713 states and 15274 transitions. [2021-04-15 02:23:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:09,572 INFO L225 Difference]: With dead ends: 4713 [2021-04-15 02:23:09,572 INFO L226 Difference]: Without dead ends: 4713 [2021-04-15 02:23:09,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-04-15 02:23:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4207. [2021-04-15 02:23:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 3.378982406086543) internal successors, (14212), 4206 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 14212 transitions. [2021-04-15 02:23:09,632 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 14212 transitions. Word has length 20 [2021-04-15 02:23:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:09,633 INFO L480 AbstractCegarLoop]: Abstraction has 4207 states and 14212 transitions. [2021-04-15 02:23:09,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 14212 transitions. [2021-04-15 02:23:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:09,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:09,635 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:09,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:09,836 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:09,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:09,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1402815744, now seen corresponding path program 105 times [2021-04-15 02:23:09,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:09,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410289081] [2021-04-15 02:23:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410289081] [2021-04-15 02:23:09,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144170846] [2021-04-15 02:23:09,904 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 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 [2021-04-15 02:23:09,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:09,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:09,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:09,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:09,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:09,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93442470] [2021-04-15 02:23:09,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:09,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:09,976 INFO L87 Difference]: Start difference. First operand 4207 states and 14212 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:10,225 INFO L93 Difference]: Finished difference Result 5066 states and 16291 transitions. [2021-04-15 02:23:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:10,231 INFO L225 Difference]: With dead ends: 5066 [2021-04-15 02:23:10,231 INFO L226 Difference]: Without dead ends: 5066 [2021-04-15 02:23:10,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-04-15 02:23:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4561. [2021-04-15 02:23:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 3.3802631578947366) internal successors, (15414), 4560 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 15414 transitions. [2021-04-15 02:23:10,292 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 15414 transitions. Word has length 20 [2021-04-15 02:23:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:10,292 INFO L480 AbstractCegarLoop]: Abstraction has 4561 states and 15414 transitions. [2021-04-15 02:23:10,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 15414 transitions. [2021-04-15 02:23:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:10,295 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:10,295 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:10,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:10,496 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1590980808, now seen corresponding path program 106 times [2021-04-15 02:23:10,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:10,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141646469] [2021-04-15 02:23:10,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:10,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141646469] [2021-04-15 02:23:10,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443571596] [2021-04-15 02:23:10,551 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 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 [2021-04-15 02:23:10,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:10,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:10,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:10,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:23:10,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104710468] [2021-04-15 02:23:10,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:23:10,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:23:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:23:10,624 INFO L87 Difference]: Start difference. First operand 4561 states and 15414 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:10,853 INFO L93 Difference]: Finished difference Result 5249 states and 17354 transitions. [2021-04-15 02:23:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:10,862 INFO L225 Difference]: With dead ends: 5249 [2021-04-15 02:23:10,862 INFO L226 Difference]: Without dead ends: 5245 [2021-04-15 02:23:10,862 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:10,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-04-15 02:23:10,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4651. [2021-04-15 02:23:10,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 3.3821505376344088) internal successors, (15727), 4650 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 15727 transitions. [2021-04-15 02:23:10,947 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 15727 transitions. Word has length 20 [2021-04-15 02:23:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:10,947 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 15727 transitions. [2021-04-15 02:23:10,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 15727 transitions. [2021-04-15 02:23:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:10,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:10,951 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:11,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:11,171 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash 713013304, now seen corresponding path program 107 times [2021-04-15 02:23:11,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:11,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471269698] [2021-04-15 02:23:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:11,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:11,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471269698] [2021-04-15 02:23:11,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887611697] [2021-04-15 02:23:11,231 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 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 [2021-04-15 02:23:11,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:11,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:11,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:11,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:11,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:11,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:11,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253901382] [2021-04-15 02:23:11,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:11,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:11,294 INFO L87 Difference]: Start difference. First operand 4651 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:11,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:11,434 INFO L93 Difference]: Finished difference Result 5919 states and 19183 transitions. [2021-04-15 02:23:11,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:11,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:11,442 INFO L225 Difference]: With dead ends: 5919 [2021-04-15 02:23:11,442 INFO L226 Difference]: Without dead ends: 5919 [2021-04-15 02:23:11,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-04-15 02:23:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5338. [2021-04-15 02:23:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.389357316844669) internal successors, (18089), 5337 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18089 transitions. [2021-04-15 02:23:11,517 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18089 transitions. Word has length 20 [2021-04-15 02:23:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:11,517 INFO L480 AbstractCegarLoop]: Abstraction has 5338 states and 18089 transitions. [2021-04-15 02:23:11,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:11,517 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18089 transitions. [2021-04-15 02:23:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:11,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:11,521 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:11,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:11,722 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2098819054, now seen corresponding path program 108 times [2021-04-15 02:23:11,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:11,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299970137] [2021-04-15 02:23:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299970137] [2021-04-15 02:23:11,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172946169] [2021-04-15 02:23:11,777 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 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 [2021-04-15 02:23:11,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:11,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:11,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:11,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:11,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067091936] [2021-04-15 02:23:11,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:11,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:11,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:11,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:11,834 INFO L87 Difference]: Start difference. First operand 5338 states and 18089 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:11,976 INFO L93 Difference]: Finished difference Result 6269 states and 20414 transitions. [2021-04-15 02:23:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:11,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:11,986 INFO L225 Difference]: With dead ends: 6269 [2021-04-15 02:23:11,987 INFO L226 Difference]: Without dead ends: 6269 [2021-04-15 02:23:11,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-04-15 02:23:12,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4444. [2021-04-15 02:23:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.356290794508215) internal successors, (14912), 4443 states have internal predecessors, (14912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 14912 transitions. [2021-04-15 02:23:12,060 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 14912 transitions. Word has length 20 [2021-04-15 02:23:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:12,060 INFO L480 AbstractCegarLoop]: Abstraction has 4444 states and 14912 transitions. [2021-04-15 02:23:12,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 14912 transitions. [2021-04-15 02:23:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:12,063 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:12,063 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:12,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3306 [2021-04-15 02:23:12,264 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:12,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1689801976, now seen corresponding path program 109 times [2021-04-15 02:23:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:12,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179908577] [2021-04-15 02:23:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179908577] [2021-04-15 02:23:12,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528924826] [2021-04-15 02:23:12,321 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 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 [2021-04-15 02:23:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:12,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:12,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284668786] [2021-04-15 02:23:12,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:12,378 INFO L87 Difference]: Start difference. First operand 4444 states and 14912 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:12,563 INFO L93 Difference]: Finished difference Result 5453 states and 17524 transitions. [2021-04-15 02:23:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:12,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:12,570 INFO L225 Difference]: With dead ends: 5453 [2021-04-15 02:23:12,571 INFO L226 Difference]: Without dead ends: 5453 [2021-04-15 02:23:12,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-04-15 02:23:12,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4957. [2021-04-15 02:23:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.3668280871670704) internal successors, (16686), 4956 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 16686 transitions. [2021-04-15 02:23:12,636 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 16686 transitions. Word has length 20 [2021-04-15 02:23:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:12,636 INFO L480 AbstractCegarLoop]: Abstraction has 4957 states and 16686 transitions. [2021-04-15 02:23:12,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 16686 transitions. [2021-04-15 02:23:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:12,641 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:12,641 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:12,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3307,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:12,862 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash 928691064, now seen corresponding path program 110 times [2021-04-15 02:23:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:12,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138945409] [2021-04-15 02:23:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138945409] [2021-04-15 02:23:12,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519288309] [2021-04-15 02:23:12,918 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:12,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:12,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:12,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:12,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:12,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:12,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:12,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962676963] [2021-04-15 02:23:12,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:12,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:12,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:12,981 INFO L87 Difference]: Start difference. First operand 4957 states and 16686 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:13,113 INFO L93 Difference]: Finished difference Result 5535 states and 17962 transitions. [2021-04-15 02:23:13,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:13,121 INFO L225 Difference]: With dead ends: 5535 [2021-04-15 02:23:13,121 INFO L226 Difference]: Without dead ends: 5535 [2021-04-15 02:23:13,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-04-15 02:23:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4104. [2021-04-15 02:23:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 3.3346331952230077) internal successors, (13682), 4103 states have internal predecessors, (13682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 13682 transitions. [2021-04-15 02:23:13,182 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 13682 transitions. Word has length 20 [2021-04-15 02:23:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:13,182 INFO L480 AbstractCegarLoop]: Abstraction has 4104 states and 13682 transitions. [2021-04-15 02:23:13,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 13682 transitions. [2021-04-15 02:23:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:13,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:13,187 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:13,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-04-15 02:23:13,401 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 422344798, now seen corresponding path program 111 times [2021-04-15 02:23:13,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:13,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115479619] [2021-04-15 02:23:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:13,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:13,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115479619] [2021-04-15 02:23:13,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328068852] [2021-04-15 02:23:13,469 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 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 [2021-04-15 02:23:13,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:13,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:13,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:13,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:13,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043372144] [2021-04-15 02:23:13,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:13,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:13,567 INFO L87 Difference]: Start difference. First operand 4104 states and 13682 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:13,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:13,807 INFO L93 Difference]: Finished difference Result 4959 states and 15903 transitions. [2021-04-15 02:23:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:13,808 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:13,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:13,815 INFO L225 Difference]: With dead ends: 4959 [2021-04-15 02:23:13,815 INFO L226 Difference]: Without dead ends: 4959 [2021-04-15 02:23:13,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-04-15 02:23:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3875. [2021-04-15 02:23:13,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 3.3304078471863705) internal successors, (12902), 3874 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 12902 transitions. [2021-04-15 02:23:13,876 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 12902 transitions. Word has length 20 [2021-04-15 02:23:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:13,876 INFO L480 AbstractCegarLoop]: Abstraction has 3875 states and 12902 transitions. [2021-04-15 02:23:13,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 12902 transitions. [2021-04-15 02:23:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:13,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:13,879 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:14,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-04-15 02:23:14,080 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:14,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1905479736, now seen corresponding path program 112 times [2021-04-15 02:23:14,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:14,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421165486] [2021-04-15 02:23:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:14,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421165486] [2021-04-15 02:23:14,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489914934] [2021-04-15 02:23:14,142 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 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 [2021-04-15 02:23:14,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:14,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:14,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:14,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:14,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:14,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:14,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856637527] [2021-04-15 02:23:14,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:14,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:14,231 INFO L87 Difference]: Start difference. First operand 3875 states and 12902 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:14,474 INFO L93 Difference]: Finished difference Result 4630 states and 14540 transitions. [2021-04-15 02:23:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:14,479 INFO L225 Difference]: With dead ends: 4630 [2021-04-15 02:23:14,479 INFO L226 Difference]: Without dead ends: 4630 [2021-04-15 02:23:14,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-04-15 02:23:14,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3885. [2021-04-15 02:23:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.33264675592173) internal successors, (12944), 3884 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:14,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 12944 transitions. [2021-04-15 02:23:14,529 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 12944 transitions. Word has length 20 [2021-04-15 02:23:14,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:14,529 INFO L480 AbstractCegarLoop]: Abstraction has 3885 states and 12944 transitions. [2021-04-15 02:23:14,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:14,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 12944 transitions. [2021-04-15 02:23:14,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:14,532 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:14,532 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:14,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:14,753 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1965054858, now seen corresponding path program 113 times [2021-04-15 02:23:14,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:14,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390866466] [2021-04-15 02:23:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:14,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390866466] [2021-04-15 02:23:14,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747055346] [2021-04-15 02:23:14,810 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 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 [2021-04-15 02:23:14,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:14,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:14,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:14,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:14,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:14,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876733299] [2021-04-15 02:23:14,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:14,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:14,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:14,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:14,873 INFO L87 Difference]: Start difference. First operand 3885 states and 12944 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) [2021-04-15 02:23:15,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:15,020 INFO L93 Difference]: Finished difference Result 4118 states and 13256 transitions. [2021-04-15 02:23:15,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:15,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:15,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:15,025 INFO L225 Difference]: With dead ends: 4118 [2021-04-15 02:23:15,025 INFO L226 Difference]: Without dead ends: 4114 [2021-04-15 02:23:15,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:15,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-04-15 02:23:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3838. [2021-04-15 02:23:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.3281209278081834) internal successors, (12770), 3837 states have internal predecessors, (12770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 12770 transitions. [2021-04-15 02:23:15,077 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 12770 transitions. Word has length 20 [2021-04-15 02:23:15,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:15,077 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 12770 transitions. [2021-04-15 02:23:15,077 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) [2021-04-15 02:23:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 12770 transitions. [2021-04-15 02:23:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:15,080 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:15,080 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:15,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:15,281 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:15,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash -750691528, now seen corresponding path program 114 times [2021-04-15 02:23:15,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:15,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587149003] [2021-04-15 02:23:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:15,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587149003] [2021-04-15 02:23:15,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632259943] [2021-04-15 02:23:15,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:23:15,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:15,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:15,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:15,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:15,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:15,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946370422] [2021-04-15 02:23:15,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:15,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:15,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:15,397 INFO L87 Difference]: Start difference. First operand 3838 states and 12770 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) [2021-04-15 02:23:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:15,470 INFO L93 Difference]: Finished difference Result 4108 states and 13151 transitions. [2021-04-15 02:23:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:23:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:15,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:15,475 INFO L225 Difference]: With dead ends: 4108 [2021-04-15 02:23:15,476 INFO L226 Difference]: Without dead ends: 4108 [2021-04-15 02:23:15,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-04-15 02:23:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3833. [2021-04-15 02:23:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 3.325678496868476) internal successors, (12744), 3832 states have internal predecessors, (12744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 12744 transitions. [2021-04-15 02:23:15,528 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 12744 transitions. Word has length 20 [2021-04-15 02:23:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:15,528 INFO L480 AbstractCegarLoop]: Abstraction has 3833 states and 12744 transitions. [2021-04-15 02:23:15,528 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) [2021-04-15 02:23:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 12744 transitions. [2021-04-15 02:23:15,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:15,531 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:15,531 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:15,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:15,733 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1815228434, now seen corresponding path program 115 times [2021-04-15 02:23:15,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:15,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356359053] [2021-04-15 02:23:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:15,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356359053] [2021-04-15 02:23:15,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980378928] [2021-04-15 02:23:15,788 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 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 [2021-04-15 02:23:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:15,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:15,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:15,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906343243] [2021-04-15 02:23:15,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:15,861 INFO L87 Difference]: Start difference. First operand 3833 states and 12744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:15,947 INFO L93 Difference]: Finished difference Result 4122 states and 13177 transitions. [2021-04-15 02:23:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:23:15,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:15,953 INFO L225 Difference]: With dead ends: 4122 [2021-04-15 02:23:15,953 INFO L226 Difference]: Without dead ends: 4122 [2021-04-15 02:23:15,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-04-15 02:23:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3834. [2021-04-15 02:23:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 3.3229846073571614) internal successors, (12737), 3833 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 12737 transitions. [2021-04-15 02:23:15,999 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 12737 transitions. Word has length 20 [2021-04-15 02:23:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:15,999 INFO L480 AbstractCegarLoop]: Abstraction has 3834 states and 12737 transitions. [2021-04-15 02:23:15,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 12737 transitions. [2021-04-15 02:23:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:16,001 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:16,002 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:16,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:16,204 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash -245631368, now seen corresponding path program 116 times [2021-04-15 02:23:16,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:16,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411425479] [2021-04-15 02:23:16,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:16,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411425479] [2021-04-15 02:23:16,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351042837] [2021-04-15 02:23:16,258 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 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 [2021-04-15 02:23:16,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:16,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:16,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:16,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:16,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:16,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:16,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383487045] [2021-04-15 02:23:16,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:16,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:16,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:16,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:16,320 INFO L87 Difference]: Start difference. First operand 3834 states and 12737 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:16,392 INFO L93 Difference]: Finished difference Result 5426 states and 17609 transitions. [2021-04-15 02:23:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:23:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:16,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:16,399 INFO L225 Difference]: With dead ends: 5426 [2021-04-15 02:23:16,399 INFO L226 Difference]: Without dead ends: 5426 [2021-04-15 02:23:16,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-04-15 02:23:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5130. [2021-04-15 02:23:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 3.3450965100409435) internal successors, (17157), 5129 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 17157 transitions. [2021-04-15 02:23:16,460 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 17157 transitions. Word has length 20 [2021-04-15 02:23:16,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:16,460 INFO L480 AbstractCegarLoop]: Abstraction has 5130 states and 17157 transitions. [2021-04-15 02:23:16,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 17157 transitions. [2021-04-15 02:23:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:16,463 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:16,464 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:16,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:16,664 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash 292224210, now seen corresponding path program 117 times [2021-04-15 02:23:16,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:16,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390269682] [2021-04-15 02:23:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:16,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390269682] [2021-04-15 02:23:16,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537231339] [2021-04-15 02:23:16,734 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 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 [2021-04-15 02:23:16,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:16,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:16,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:16,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:16,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:16,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998018306] [2021-04-15 02:23:16,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:16,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:16,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:16,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:16,812 INFO L87 Difference]: Start difference. First operand 5130 states and 17157 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:16,990 INFO L93 Difference]: Finished difference Result 5508 states and 17780 transitions. [2021-04-15 02:23:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:17,001 INFO L225 Difference]: With dead ends: 5508 [2021-04-15 02:23:17,001 INFO L226 Difference]: Without dead ends: 5508 [2021-04-15 02:23:17,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-04-15 02:23:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5142. [2021-04-15 02:23:17,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.3433184205407507) internal successors, (17188), 5141 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 17188 transitions. [2021-04-15 02:23:17,097 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 17188 transitions. Word has length 20 [2021-04-15 02:23:17,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:17,097 INFO L480 AbstractCegarLoop]: Abstraction has 5142 states and 17188 transitions. [2021-04-15 02:23:17,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 17188 transitions. [2021-04-15 02:23:17,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:17,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:17,102 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:17,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3315 [2021-04-15 02:23:17,317 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:17,317 INFO L82 PathProgramCache]: Analyzing trace with hash -214122056, now seen corresponding path program 118 times [2021-04-15 02:23:17,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:17,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662897073] [2021-04-15 02:23:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:17,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662897073] [2021-04-15 02:23:17,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678873004] [2021-04-15 02:23:17,375 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 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 [2021-04-15 02:23:17,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:17,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:17,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:17,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:17,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:17,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:17,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599431684] [2021-04-15 02:23:17,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:17,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:17,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:17,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:17,435 INFO L87 Difference]: Start difference. First operand 5142 states and 17188 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:17,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:17,554 INFO L93 Difference]: Finished difference Result 5808 states and 18946 transitions. [2021-04-15 02:23:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:17,561 INFO L225 Difference]: With dead ends: 5808 [2021-04-15 02:23:17,561 INFO L226 Difference]: Without dead ends: 5808 [2021-04-15 02:23:17,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-04-15 02:23:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5576. [2021-04-15 02:23:17,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5575 states have (on average 3.337219730941704) internal successors, (18605), 5575 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 18605 transitions. [2021-04-15 02:23:17,629 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 18605 transitions. Word has length 20 [2021-04-15 02:23:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:17,629 INFO L480 AbstractCegarLoop]: Abstraction has 5576 states and 18605 transitions. [2021-04-15 02:23:17,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 18605 transitions. [2021-04-15 02:23:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:17,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:17,632 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:17,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:17,849 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:17,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1269012882, now seen corresponding path program 119 times [2021-04-15 02:23:17,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:17,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955675095] [2021-04-15 02:23:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:17,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955675095] [2021-04-15 02:23:17,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717281921] [2021-04-15 02:23:17,914 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:17,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:17,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:17,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:17,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:17,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:17,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953932418] [2021-04-15 02:23:17,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:17,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:17,977 INFO L87 Difference]: Start difference. First operand 5576 states and 18605 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:18,185 INFO L93 Difference]: Finished difference Result 6051 states and 19578 transitions. [2021-04-15 02:23:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:18,195 INFO L225 Difference]: With dead ends: 6051 [2021-04-15 02:23:18,195 INFO L226 Difference]: Without dead ends: 6051 [2021-04-15 02:23:18,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:23:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-04-15 02:23:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 5723. [2021-04-15 02:23:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.3318769660957708) internal successors, (19065), 5722 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19065 transitions. [2021-04-15 02:23:18,271 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19065 transitions. Word has length 20 [2021-04-15 02:23:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:18,271 INFO L480 AbstractCegarLoop]: Abstraction has 5723 states and 19065 transitions. [2021-04-15 02:23:18,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19065 transitions. [2021-04-15 02:23:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:18,274 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:18,274 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:18,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:18,475 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1555704, now seen corresponding path program 120 times [2021-04-15 02:23:18,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:18,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884818255] [2021-04-15 02:23:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884818255] [2021-04-15 02:23:18,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209296842] [2021-04-15 02:23:18,553 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 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 [2021-04-15 02:23:18,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:18,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:18,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:18,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:18,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:18,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:18,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984615952] [2021-04-15 02:23:18,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:18,616 INFO L87 Difference]: Start difference. First operand 5723 states and 19065 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:18,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:18,891 INFO L93 Difference]: Finished difference Result 6305 states and 20268 transitions. [2021-04-15 02:23:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:23:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:18,899 INFO L225 Difference]: With dead ends: 6305 [2021-04-15 02:23:18,899 INFO L226 Difference]: Without dead ends: 6305 [2021-04-15 02:23:18,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:23:18,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-04-15 02:23:18,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5812. [2021-04-15 02:23:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.3271381861985887) internal successors, (19334), 5811 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:18,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19334 transitions. [2021-04-15 02:23:18,972 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19334 transitions. Word has length 20 [2021-04-15 02:23:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:18,972 INFO L480 AbstractCegarLoop]: Abstraction has 5812 states and 19334 transitions. [2021-04-15 02:23:18,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19334 transitions. [2021-04-15 02:23:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:18,976 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:18,976 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:19,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-04-15 02:23:19,176 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1106701056, now seen corresponding path program 121 times [2021-04-15 02:23:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35191125] [2021-04-15 02:23:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:19,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35191125] [2021-04-15 02:23:19,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276479471] [2021-04-15 02:23:19,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:23:19,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:19,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:19,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:19,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:19,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158354339] [2021-04-15 02:23:19,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:19,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:19,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:19,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:19,289 INFO L87 Difference]: Start difference. First operand 5812 states and 19334 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:19,483 INFO L93 Difference]: Finished difference Result 6089 states and 19769 transitions. [2021-04-15 02:23:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:19,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:19,492 INFO L225 Difference]: With dead ends: 6089 [2021-04-15 02:23:19,492 INFO L226 Difference]: Without dead ends: 6085 [2021-04-15 02:23:19,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-04-15 02:23:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5545. [2021-04-15 02:23:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5544 states have (on average 3.3145743145743145) internal successors, (18376), 5544 states have internal predecessors, (18376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 18376 transitions. [2021-04-15 02:23:19,578 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 18376 transitions. Word has length 20 [2021-04-15 02:23:19,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:19,578 INFO L480 AbstractCegarLoop]: Abstraction has 5545 states and 18376 transitions. [2021-04-15 02:23:19,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 18376 transitions. [2021-04-15 02:23:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:19,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:19,616 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:19,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3319,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:19,816 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash 92516544, now seen corresponding path program 122 times [2021-04-15 02:23:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:19,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244672370] [2021-04-15 02:23:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:19,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244672370] [2021-04-15 02:23:19,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233702526] [2021-04-15 02:23:19,880 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 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 [2021-04-15 02:23:19,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:19,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:19,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:19,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:19,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:19,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:19,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:19,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128795036] [2021-04-15 02:23:19,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:19,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:19,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:19,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:19,937 INFO L87 Difference]: Start difference. First operand 5545 states and 18376 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:20,136 INFO L93 Difference]: Finished difference Result 7476 states and 23877 transitions. [2021-04-15 02:23:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:20,147 INFO L225 Difference]: With dead ends: 7476 [2021-04-15 02:23:20,147 INFO L226 Difference]: Without dead ends: 7476 [2021-04-15 02:23:20,147 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-04-15 02:23:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6757. [2021-04-15 02:23:20,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.312314979277679) internal successors, (22378), 6756 states have internal predecessors, (22378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:20,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22378 transitions. [2021-04-15 02:23:20,240 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22378 transitions. Word has length 20 [2021-04-15 02:23:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:20,240 INFO L480 AbstractCegarLoop]: Abstraction has 6757 states and 22378 transitions. [2021-04-15 02:23:20,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22378 transitions. [2021-04-15 02:23:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:20,244 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:20,245 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:20,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-04-15 02:23:20,445 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1174940634, now seen corresponding path program 123 times [2021-04-15 02:23:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:20,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638692898] [2021-04-15 02:23:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:20,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:20,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638692898] [2021-04-15 02:23:20,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247083197] [2021-04-15 02:23:20,502 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 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 [2021-04-15 02:23:20,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:23:20,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:20,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:20,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:20,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:20,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:20,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813129524] [2021-04-15 02:23:20,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:20,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:20,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:20,567 INFO L87 Difference]: Start difference. First operand 6757 states and 22378 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:20,756 INFO L93 Difference]: Finished difference Result 7967 states and 25615 transitions. [2021-04-15 02:23:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:20,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:20,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:20,766 INFO L225 Difference]: With dead ends: 7967 [2021-04-15 02:23:20,767 INFO L226 Difference]: Without dead ends: 7967 [2021-04-15 02:23:20,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:23:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2021-04-15 02:23:20,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 5441. [2021-04-15 02:23:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.2928308823529413) internal successors, (17913), 5440 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 17913 transitions. [2021-04-15 02:23:20,846 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 17913 transitions. Word has length 20 [2021-04-15 02:23:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:20,846 INFO L480 AbstractCegarLoop]: Abstraction has 5441 states and 17913 transitions. [2021-04-15 02:23:20,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 17913 transitions. [2021-04-15 02:23:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:20,850 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:20,850 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:21,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:21,053 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:21,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:21,053 INFO L82 PathProgramCache]: Analyzing trace with hash 308194304, now seen corresponding path program 124 times [2021-04-15 02:23:21,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:21,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995560004] [2021-04-15 02:23:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:21,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995560004] [2021-04-15 02:23:21,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259240420] [2021-04-15 02:23:21,115 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 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 [2021-04-15 02:23:21,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:21,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:21,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400184019] [2021-04-15 02:23:21,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:21,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:21,180 INFO L87 Difference]: Start difference. First operand 5441 states and 17913 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:21,446 INFO L93 Difference]: Finished difference Result 6867 states and 21677 transitions. [2021-04-15 02:23:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 02:23:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:21,454 INFO L225 Difference]: With dead ends: 6867 [2021-04-15 02:23:21,454 INFO L226 Difference]: Without dead ends: 6867 [2021-04-15 02:23:21,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-04-15 02:23:21,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5507. [2021-04-15 02:23:21,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 3.2944061024337086) internal successors, (18139), 5506 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 18139 transitions. [2021-04-15 02:23:21,523 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 18139 transitions. Word has length 20 [2021-04-15 02:23:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:21,523 INFO L480 AbstractCegarLoop]: Abstraction has 5507 states and 18139 transitions. [2021-04-15 02:23:21,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 18139 transitions. [2021-04-15 02:23:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:21,527 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:21,527 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:21,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:21,729 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1811407488, now seen corresponding path program 125 times [2021-04-15 02:23:21,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:21,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146553944] [2021-04-15 02:23:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:21,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146553944] [2021-04-15 02:23:21,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777371944] [2021-04-15 02:23:21,799 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:23:21,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 02:23:21,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:21,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:21,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:21,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031623440] [2021-04-15 02:23:21,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:21,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:21,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:21,887 INFO L87 Difference]: Start difference. First operand 5507 states and 18139 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:22,077 INFO L93 Difference]: Finished difference Result 6222 states and 19873 transitions. [2021-04-15 02:23:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:22,090 INFO L225 Difference]: With dead ends: 6222 [2021-04-15 02:23:22,090 INFO L226 Difference]: Without dead ends: 6222 [2021-04-15 02:23:22,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-04-15 02:23:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5437. [2021-04-15 02:23:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 3.3015084621044886) internal successors, (17947), 5436 states have internal predecessors, (17947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 17947 transitions. [2021-04-15 02:23:22,203 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 17947 transitions. Word has length 20 [2021-04-15 02:23:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:22,204 INFO L480 AbstractCegarLoop]: Abstraction has 5437 states and 17947 transitions. [2021-04-15 02:23:22,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 17947 transitions. [2021-04-15 02:23:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:22,209 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:22,209 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:22,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:22,425 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash -328272550, now seen corresponding path program 126 times [2021-04-15 02:23:22,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:22,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409123045] [2021-04-15 02:23:22,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409123045] [2021-04-15 02:23:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309169810] [2021-04-15 02:23:22,492 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 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 [2021-04-15 02:23:22,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 02:23:22,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:22,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:22,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:22,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:22,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654733367] [2021-04-15 02:23:22,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:22,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:22,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:22,593 INFO L87 Difference]: Start difference. First operand 5437 states and 17947 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:22,810 INFO L93 Difference]: Finished difference Result 5885 states and 18864 transitions. [2021-04-15 02:23:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:22,821 INFO L225 Difference]: With dead ends: 5885 [2021-04-15 02:23:22,821 INFO L226 Difference]: Without dead ends: 5885 [2021-04-15 02:23:22,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2021-04-15 02:23:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-04-15 02:23:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5474. [2021-04-15 02:23:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.3012972775443084) internal successors, (18068), 5473 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18068 transitions. [2021-04-15 02:23:22,903 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18068 transitions. Word has length 20 [2021-04-15 02:23:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:22,904 INFO L480 AbstractCegarLoop]: Abstraction has 5474 states and 18068 transitions. [2021-04-15 02:23:22,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18068 transitions. [2021-04-15 02:23:22,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:22,908 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:22,908 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:23,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:23,109 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:23,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:23,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1595729728, now seen corresponding path program 127 times [2021-04-15 02:23:23,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:23,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062984937] [2021-04-15 02:23:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:23,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062984937] [2021-04-15 02:23:23,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074114004] [2021-04-15 02:23:23,174 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 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 [2021-04-15 02:23:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:23,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:23,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:23,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:23,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:23,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544704363] [2021-04-15 02:23:23,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:23,243 INFO L87 Difference]: Start difference. First operand 5474 states and 18068 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:23,529 INFO L93 Difference]: Finished difference Result 6017 states and 19173 transitions. [2021-04-15 02:23:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:23:23,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:23,538 INFO L225 Difference]: With dead ends: 6017 [2021-04-15 02:23:23,538 INFO L226 Difference]: Without dead ends: 6017 [2021-04-15 02:23:23,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:23:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2021-04-15 02:23:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5473. [2021-04-15 02:23:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 3.30171783625731) internal successors, (18067), 5472 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 18067 transitions. [2021-04-15 02:23:23,612 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 18067 transitions. Word has length 20 [2021-04-15 02:23:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:23,612 INFO L480 AbstractCegarLoop]: Abstraction has 5473 states and 18067 transitions. [2021-04-15 02:23:23,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:23,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 18067 transitions. [2021-04-15 02:23:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:23,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:23,616 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:23,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:23,817 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133432, now seen corresponding path program 128 times [2021-04-15 02:23:23,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:23,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121857183] [2021-04-15 02:23:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:23,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:23,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121857183] [2021-04-15 02:23:23,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407184803] [2021-04-15 02:23:23,887 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 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 [2021-04-15 02:23:23,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:23,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:23,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:23,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:23,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226195316] [2021-04-15 02:23:23,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:23,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:23,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:23,949 INFO L87 Difference]: Start difference. First operand 5473 states and 18067 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) [2021-04-15 02:23:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:24,097 INFO L93 Difference]: Finished difference Result 5764 states and 18581 transitions. [2021-04-15 02:23:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:24,105 INFO L225 Difference]: With dead ends: 5764 [2021-04-15 02:23:24,105 INFO L226 Difference]: Without dead ends: 5760 [2021-04-15 02:23:24,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-04-15 02:23:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5552. [2021-04-15 02:23:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 3.301747432894974) internal successors, (18328), 5551 states have internal predecessors, (18328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 18328 transitions. [2021-04-15 02:23:24,177 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 18328 transitions. Word has length 20 [2021-04-15 02:23:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:24,177 INFO L480 AbstractCegarLoop]: Abstraction has 5552 states and 18328 transitions. [2021-04-15 02:23:24,177 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) [2021-04-15 02:23:24,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 18328 transitions. [2021-04-15 02:23:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:24,181 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:24,182 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:24,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3326,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:24,382 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:24,383 INFO L82 PathProgramCache]: Analyzing trace with hash -603612954, now seen corresponding path program 129 times [2021-04-15 02:23:24,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:24,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279674808] [2021-04-15 02:23:24,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279674808] [2021-04-15 02:23:24,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630302400] [2021-04-15 02:23:24,454 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 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 [2021-04-15 02:23:24,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:24,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:24,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:24,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:24,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:24,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:24,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849542885] [2021-04-15 02:23:24,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:24,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:24,512 INFO L87 Difference]: Start difference. First operand 5552 states and 18328 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) [2021-04-15 02:23:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:24,602 INFO L93 Difference]: Finished difference Result 5872 states and 18869 transitions. [2021-04-15 02:23:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:24,611 INFO L225 Difference]: With dead ends: 5872 [2021-04-15 02:23:24,611 INFO L226 Difference]: Without dead ends: 5872 [2021-04-15 02:23:24,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-04-15 02:23:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5560. [2021-04-15 02:23:24,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 3.300593631948192) internal successors, (18348), 5559 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 18348 transitions. [2021-04-15 02:23:24,699 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 18348 transitions. Word has length 20 [2021-04-15 02:23:24,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:24,699 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 18348 transitions. [2021-04-15 02:23:24,699 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) [2021-04-15 02:23:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 18348 transitions. [2021-04-15 02:23:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:24,703 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:24,703 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:24,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3327,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:24,904 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1962307008, now seen corresponding path program 130 times [2021-04-15 02:23:24,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:24,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731382070] [2021-04-15 02:23:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731382070] [2021-04-15 02:23:24,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940036577] [2021-04-15 02:23:24,954 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 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 [2021-04-15 02:23:24,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:24,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:25,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:25,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:25,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108711118] [2021-04-15 02:23:25,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:25,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:25,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:25,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:25,016 INFO L87 Difference]: Start difference. First operand 5560 states and 18348 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:25,130 INFO L93 Difference]: Finished difference Result 5951 states and 19077 transitions. [2021-04-15 02:23:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:25,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:25,137 INFO L225 Difference]: With dead ends: 5951 [2021-04-15 02:23:25,138 INFO L226 Difference]: Without dead ends: 5951 [2021-04-15 02:23:25,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-04-15 02:23:25,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5587. [2021-04-15 02:23:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.2986036519871105) internal successors, (18426), 5586 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18426 transitions. [2021-04-15 02:23:25,210 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18426 transitions. Word has length 20 [2021-04-15 02:23:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:25,210 INFO L480 AbstractCegarLoop]: Abstraction has 5587 states and 18426 transitions. [2021-04-15 02:23:25,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18426 transitions. [2021-04-15 02:23:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:25,247 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:25,247 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:25,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:25,453 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash -98552794, now seen corresponding path program 131 times [2021-04-15 02:23:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:25,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691129805] [2021-04-15 02:23:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:25,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691129805] [2021-04-15 02:23:25,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218202250] [2021-04-15 02:23:25,504 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 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 [2021-04-15 02:23:25,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:25,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:25,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:25,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:25,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676453887] [2021-04-15 02:23:25,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:25,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:25,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:25,569 INFO L87 Difference]: Start difference. First operand 5587 states and 18426 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:25,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:25,676 INFO L93 Difference]: Finished difference Result 7442 states and 23969 transitions. [2021-04-15 02:23:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:23:25,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:25,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:25,686 INFO L225 Difference]: With dead ends: 7442 [2021-04-15 02:23:25,686 INFO L226 Difference]: Without dead ends: 7442 [2021-04-15 02:23:25,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:23:25,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2021-04-15 02:23:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7001. [2021-04-15 02:23:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 3.3085714285714287) internal successors, (23160), 7000 states have internal predecessors, (23160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:25,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 23160 transitions. [2021-04-15 02:23:25,781 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 23160 transitions. Word has length 20 [2021-04-15 02:23:25,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:25,781 INFO L480 AbstractCegarLoop]: Abstraction has 7001 states and 23160 transitions. [2021-04-15 02:23:25,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:25,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 23160 transitions. [2021-04-15 02:23:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:25,785 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:25,785 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:25,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-04-15 02:23:25,986 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:25,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash 439302784, now seen corresponding path program 132 times [2021-04-15 02:23:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:25,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828543413] [2021-04-15 02:23:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:26,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828543413] [2021-04-15 02:23:26,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131730059] [2021-04-15 02:23:26,040 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 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 [2021-04-15 02:23:26,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:26,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:26,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:26,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:26,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:26,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406806] [2021-04-15 02:23:26,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:26,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:26,111 INFO L87 Difference]: Start difference. First operand 7001 states and 23160 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:26,198 INFO L93 Difference]: Finished difference Result 7460 states and 24267 transitions. [2021-04-15 02:23:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:23:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-04-15 02:23:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:26,208 INFO L225 Difference]: With dead ends: 7460 [2021-04-15 02:23:26,208 INFO L226 Difference]: Without dead ends: 7460 [2021-04-15 02:23:26,208 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-04-15 02:23:26,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7283. [2021-04-15 02:23:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.300466904696512) internal successors, (24034), 7282 states have internal predecessors, (24034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24034 transitions. [2021-04-15 02:23:26,306 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24034 transitions. Word has length 20 [2021-04-15 02:23:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:26,307 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 24034 transitions. [2021-04-15 02:23:26,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24034 transitions. [2021-04-15 02:23:26,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:26,311 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:26,311 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:26,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-04-15 02:23:26,512 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash -67043482, now seen corresponding path program 133 times [2021-04-15 02:23:26,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:26,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509225022] [2021-04-15 02:23:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509225022] [2021-04-15 02:23:26,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757823394] [2021-04-15 02:23:26,577 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 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 [2021-04-15 02:23:26,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:26,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:26,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:26,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:26,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:26,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573237626] [2021-04-15 02:23:26,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:26,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:26,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:26,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:26,638 INFO L87 Difference]: Start difference. First operand 7283 states and 24034 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:26,768 INFO L93 Difference]: Finished difference Result 7550 states and 24471 transitions. [2021-04-15 02:23:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:26,777 INFO L225 Difference]: With dead ends: 7550 [2021-04-15 02:23:26,777 INFO L226 Difference]: Without dead ends: 7550 [2021-04-15 02:23:26,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-04-15 02:23:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7283. [2021-04-15 02:23:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.3001922548750344) internal successors, (24032), 7282 states have internal predecessors, (24032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24032 transitions. [2021-04-15 02:23:26,868 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24032 transitions. Word has length 20 [2021-04-15 02:23:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:26,868 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 24032 transitions. [2021-04-15 02:23:26,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24032 transitions. [2021-04-15 02:23:26,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:26,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:26,872 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:27,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-04-15 02:23:27,073 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1416091456, now seen corresponding path program 134 times [2021-04-15 02:23:27,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:27,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776889033] [2021-04-15 02:23:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776889033] [2021-04-15 02:23:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852789509] [2021-04-15 02:23:27,136 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 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 [2021-04-15 02:23:27,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:27,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:27,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:27,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:27,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:27,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:27,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042934194] [2021-04-15 02:23:27,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:27,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:27,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:27,198 INFO L87 Difference]: Start difference. First operand 7283 states and 24032 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:27,368 INFO L93 Difference]: Finished difference Result 7595 states and 24674 transitions. [2021-04-15 02:23:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:27,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:27,379 INFO L225 Difference]: With dead ends: 7595 [2021-04-15 02:23:27,379 INFO L226 Difference]: Without dead ends: 7595 [2021-04-15 02:23:27,380 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2021-04-15 02:23:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 7376. [2021-04-15 02:23:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.296677966101695) internal successors, (24313), 7375 states have internal predecessors, (24313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24313 transitions. [2021-04-15 02:23:27,475 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24313 transitions. Word has length 20 [2021-04-15 02:23:27,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:27,475 INFO L480 AbstractCegarLoop]: Abstraction has 7376 states and 24313 transitions. [2021-04-15 02:23:27,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24313 transitions. [2021-04-15 02:23:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:27,480 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:27,480 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:27,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:27,680 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 148634278, now seen corresponding path program 135 times [2021-04-15 02:23:27,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:27,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351810374] [2021-04-15 02:23:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:27,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:27,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351810374] [2021-04-15 02:23:27,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271501411] [2021-04-15 02:23:27,752 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 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 [2021-04-15 02:23:27,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:27,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:27,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:27,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:27,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:27,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217428883] [2021-04-15 02:23:27,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:27,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:27,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:27,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:27,816 INFO L87 Difference]: Start difference. First operand 7376 states and 24313 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:28,064 INFO L93 Difference]: Finished difference Result 7693 states and 24913 transitions. [2021-04-15 02:23:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:28,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:28,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:28,074 INFO L225 Difference]: With dead ends: 7693 [2021-04-15 02:23:28,074 INFO L226 Difference]: Without dead ends: 7693 [2021-04-15 02:23:28,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:23:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-04-15 02:23:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7412. [2021-04-15 02:23:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 3.295236810147079) internal successors, (24421), 7411 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 24421 transitions. [2021-04-15 02:23:28,172 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 24421 transitions. Word has length 20 [2021-04-15 02:23:28,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:28,172 INFO L480 AbstractCegarLoop]: Abstraction has 7412 states and 24421 transitions. [2021-04-15 02:23:28,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 24421 transitions. [2021-04-15 02:23:28,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:28,176 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:28,176 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:28,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:28,377 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash -487832576, now seen corresponding path program 136 times [2021-04-15 02:23:28,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:28,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653186722] [2021-04-15 02:23:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:28,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653186722] [2021-04-15 02:23:28,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208627152] [2021-04-15 02:23:28,447 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 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 [2021-04-15 02:23:28,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:28,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:28,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:28,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221672952] [2021-04-15 02:23:28,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:28,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:28,513 INFO L87 Difference]: Start difference. First operand 7412 states and 24421 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:28,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:28,802 INFO L93 Difference]: Finished difference Result 7927 states and 25571 transitions. [2021-04-15 02:23:28,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 02:23:28,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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 [2021-04-15 02:23:28,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:28,812 INFO L225 Difference]: With dead ends: 7927 [2021-04-15 02:23:28,812 INFO L226 Difference]: Without dead ends: 7927 [2021-04-15 02:23:28,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:23:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-04-15 02:23:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7453. [2021-04-15 02:23:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.293612453032743) internal successors, (24544), 7452 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 24544 transitions. [2021-04-15 02:23:28,906 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 24544 transitions. Word has length 20 [2021-04-15 02:23:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:28,906 INFO L480 AbstractCegarLoop]: Abstraction has 7453 states and 24544 transitions. [2021-04-15 02:23:28,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 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) [2021-04-15 02:23:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 24544 transitions. [2021-04-15 02:23:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:28,910 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:28,910 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:29,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3334 [2021-04-15 02:23:29,112 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1164507080, now seen corresponding path program 137 times [2021-04-15 02:23:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:29,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839075309] [2021-04-15 02:23:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:29,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839075309] [2021-04-15 02:23:29,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400091149] [2021-04-15 02:23:29,184 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 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 [2021-04-15 02:23:29,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:29,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:29,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:29,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:29,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:29,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:29,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2254208] [2021-04-15 02:23:29,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:29,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:29,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:29,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:29,237 INFO L87 Difference]: Start difference. First operand 7453 states and 24544 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) [2021-04-15 02:23:29,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:29,462 INFO L93 Difference]: Finished difference Result 7682 states and 24832 transitions. [2021-04-15 02:23:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 02:23:29,463 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 [2021-04-15 02:23:29,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:29,474 INFO L225 Difference]: With dead ends: 7682 [2021-04-15 02:23:29,474 INFO L226 Difference]: Without dead ends: 7678 [2021-04-15 02:23:29,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-04-15 02:23:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7414. [2021-04-15 02:23:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.2917847025495752) internal successors, (24402), 7413 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 24402 transitions. [2021-04-15 02:23:29,583 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 24402 transitions. Word has length 20 [2021-04-15 02:23:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:29,583 INFO L480 AbstractCegarLoop]: Abstraction has 7414 states and 24402 transitions. [2021-04-15 02:23:29,583 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) [2021-04-15 02:23:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 24402 transitions. [2021-04-15 02:23:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:29,588 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:29,588 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:29,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:29,788 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:29,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1963013832, now seen corresponding path program 138 times [2021-04-15 02:23:29,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:29,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336912217] [2021-04-15 02:23:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:29,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336912217] [2021-04-15 02:23:29,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597767822] [2021-04-15 02:23:29,856 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 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 [2021-04-15 02:23:29,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:29,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:29,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:29,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:29,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851709529] [2021-04-15 02:23:29,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:29,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:29,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:29,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:29,923 INFO L87 Difference]: Start difference. First operand 7414 states and 24402 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) [2021-04-15 02:23:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:30,190 INFO L93 Difference]: Finished difference Result 9451 states and 30109 transitions. [2021-04-15 02:23:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 02:23:30,190 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 20 [2021-04-15 02:23:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:30,203 INFO L225 Difference]: With dead ends: 9451 [2021-04-15 02:23:30,203 INFO L226 Difference]: Without dead ends: 9451 [2021-04-15 02:23:30,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-04-15 02:23:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 7875. [2021-04-15 02:23:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.276987553975108) internal successors, (25803), 7874 states have internal predecessors, (25803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 25803 transitions. [2021-04-15 02:23:30,349 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 25803 transitions. Word has length 20 [2021-04-15 02:23:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:30,349 INFO L480 AbstractCegarLoop]: Abstraction has 7875 states and 25803 transitions. [2021-04-15 02:23:30,349 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) [2021-04-15 02:23:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 25803 transitions. [2021-04-15 02:23:30,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:30,354 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:30,354 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:30,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:30,555 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1695486610, now seen corresponding path program 139 times [2021-04-15 02:23:30,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:30,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290974560] [2021-04-15 02:23:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:30,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290974560] [2021-04-15 02:23:30,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618958910] [2021-04-15 02:23:30,620 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 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 [2021-04-15 02:23:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:30,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:30,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:30,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:30,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117977099] [2021-04-15 02:23:30,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:30,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:30,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:30,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:30,686 INFO L87 Difference]: Start difference. First operand 7875 states and 25803 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) [2021-04-15 02:23:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:30,921 INFO L93 Difference]: Finished difference Result 8447 states and 27068 transitions. [2021-04-15 02:23:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:30,922 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 20 [2021-04-15 02:23:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:30,934 INFO L225 Difference]: With dead ends: 8447 [2021-04-15 02:23:30,934 INFO L226 Difference]: Without dead ends: 8447 [2021-04-15 02:23:30,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:23:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-04-15 02:23:31,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 7839. [2021-04-15 02:23:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 3.280556264353151) internal successors, (25713), 7838 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:31,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 25713 transitions. [2021-04-15 02:23:31,048 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 25713 transitions. Word has length 20 [2021-04-15 02:23:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:31,048 INFO L480 AbstractCegarLoop]: Abstraction has 7839 states and 25713 transitions. [2021-04-15 02:23:31,048 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) [2021-04-15 02:23:31,049 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 25713 transitions. [2021-04-15 02:23:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:31,054 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:31,054 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:31,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:31,254 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash 428029432, now seen corresponding path program 140 times [2021-04-15 02:23:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794640143] [2021-04-15 02:23:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:31,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794640143] [2021-04-15 02:23:31,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652022678] [2021-04-15 02:23:31,334 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 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 [2021-04-15 02:23:31,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:31,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:31,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:31,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:31,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:31,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260481994] [2021-04-15 02:23:31,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:31,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:31,410 INFO L87 Difference]: Start difference. First operand 7839 states and 25713 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) [2021-04-15 02:23:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:31,785 INFO L93 Difference]: Finished difference Result 8546 states and 27359 transitions. [2021-04-15 02:23:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-04-15 02:23:31,785 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 20 [2021-04-15 02:23:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:31,796 INFO L225 Difference]: With dead ends: 8546 [2021-04-15 02:23:31,796 INFO L226 Difference]: Without dead ends: 8546 [2021-04-15 02:23:31,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 318.6ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:23:31,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2021-04-15 02:23:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7853. [2021-04-15 02:23:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 7852 states have (on average 3.281074885379521) internal successors, (25763), 7852 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 25763 transitions. [2021-04-15 02:23:31,902 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 25763 transitions. Word has length 20 [2021-04-15 02:23:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:31,902 INFO L480 AbstractCegarLoop]: Abstraction has 7853 states and 25763 transitions. [2021-04-15 02:23:31,902 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) [2021-04-15 02:23:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 25763 transitions. [2021-04-15 02:23:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:31,907 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:31,907 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:32,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3338 [2021-04-15 02:23:32,108 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:32,109 INFO L82 PathProgramCache]: Analyzing trace with hash -855116680, now seen corresponding path program 141 times [2021-04-15 02:23:32,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:32,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758221999] [2021-04-15 02:23:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758221999] [2021-04-15 02:23:32,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31603703] [2021-04-15 02:23:32,173 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 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 [2021-04-15 02:23:32,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:23:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:32,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:32,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:32,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040690641] [2021-04-15 02:23:32,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:32,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:32,236 INFO L87 Difference]: Start difference. First operand 7853 states and 25763 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) [2021-04-15 02:23:32,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:32,454 INFO L93 Difference]: Finished difference Result 8149 states and 26291 transitions. [2021-04-15 02:23:32,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:32,455 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 20 [2021-04-15 02:23:32,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:32,467 INFO L225 Difference]: With dead ends: 8149 [2021-04-15 02:23:32,467 INFO L226 Difference]: Without dead ends: 8149 [2021-04-15 02:23:32,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:23:32,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-04-15 02:23:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7829. [2021-04-15 02:23:32,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 3.281936637710782) internal successors, (25691), 7828 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 25691 transitions. [2021-04-15 02:23:32,578 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 25691 transitions. Word has length 20 [2021-04-15 02:23:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:32,578 INFO L480 AbstractCegarLoop]: Abstraction has 7829 states and 25691 transitions. [2021-04-15 02:23:32,578 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) [2021-04-15 02:23:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 25691 transitions. [2021-04-15 02:23:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:32,584 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:32,584 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:32,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-04-15 02:23:32,784 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2122573858, now seen corresponding path program 142 times [2021-04-15 02:23:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:32,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366694498] [2021-04-15 02:23:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:32,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366694498] [2021-04-15 02:23:32,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917529115] [2021-04-15 02:23:32,869 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 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 [2021-04-15 02:23:32,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:32,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:32,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:32,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:32,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:32,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:32,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680710248] [2021-04-15 02:23:32,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:32,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:32,931 INFO L87 Difference]: Start difference. First operand 7829 states and 25691 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) [2021-04-15 02:23:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:33,217 INFO L93 Difference]: Finished difference Result 8079 states and 26147 transitions. [2021-04-15 02:23:33,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:23:33,218 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 20 [2021-04-15 02:23:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:33,231 INFO L225 Difference]: With dead ends: 8079 [2021-04-15 02:23:33,231 INFO L226 Difference]: Without dead ends: 8079 [2021-04-15 02:23:33,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 247.5ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 02:23:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-04-15 02:23:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7824. [2021-04-15 02:23:33,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.2821168349737952) internal successors, (25676), 7823 states have internal predecessors, (25676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 25676 transitions. [2021-04-15 02:23:33,360 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 25676 transitions. Word has length 20 [2021-04-15 02:23:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:33,360 INFO L480 AbstractCegarLoop]: Abstraction has 7824 states and 25676 transitions. [2021-04-15 02:23:33,360 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) [2021-04-15 02:23:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 25676 transitions. [2021-04-15 02:23:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:33,365 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:33,365 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:33,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-04-15 02:23:33,566 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926584, now seen corresponding path program 143 times [2021-04-15 02:23:33,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:33,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236458966] [2021-04-15 02:23:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:33,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236458966] [2021-04-15 02:23:33,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966106898] [2021-04-15 02:23:33,643 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 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 [2021-04-15 02:23:33,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:33,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:33,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:33,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798916209] [2021-04-15 02:23:33,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:33,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:33,713 INFO L87 Difference]: Start difference. First operand 7824 states and 25676 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) [2021-04-15 02:23:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:34,038 INFO L93 Difference]: Finished difference Result 8238 states and 26604 transitions. [2021-04-15 02:23:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 02:23:34,039 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 20 [2021-04-15 02:23:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:34,051 INFO L225 Difference]: With dead ends: 8238 [2021-04-15 02:23:34,051 INFO L226 Difference]: Without dead ends: 8238 [2021-04-15 02:23:34,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 02:23:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-04-15 02:23:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7821. [2021-04-15 02:23:34,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 3.282225063938619) internal successors, (25667), 7820 states have internal predecessors, (25667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 25667 transitions. [2021-04-15 02:23:34,165 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 25667 transitions. Word has length 20 [2021-04-15 02:23:34,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:34,165 INFO L480 AbstractCegarLoop]: Abstraction has 7821 states and 25667 transitions. [2021-04-15 02:23:34,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:34,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 25667 transitions. [2021-04-15 02:23:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:34,170 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:34,170 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:34,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-04-15 02:23:34,373 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:34,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1918365366, now seen corresponding path program 144 times [2021-04-15 02:23:34,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:34,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805853243] [2021-04-15 02:23:34,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:34,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805853243] [2021-04-15 02:23:34,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023917907] [2021-04-15 02:23:34,425 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 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 [2021-04-15 02:23:34,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:23:34,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:34,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:34,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:34,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:34,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:34,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112694603] [2021-04-15 02:23:34,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:34,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:34,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:34,478 INFO L87 Difference]: Start difference. First operand 7821 states and 25667 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) [2021-04-15 02:23:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:34,641 INFO L93 Difference]: Finished difference Result 8648 states and 28004 transitions. [2021-04-15 02:23:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:34,642 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 [2021-04-15 02:23:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:34,654 INFO L225 Difference]: With dead ends: 8648 [2021-04-15 02:23:34,654 INFO L226 Difference]: Without dead ends: 8646 [2021-04-15 02:23:34,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-04-15 02:23:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8471. [2021-04-15 02:23:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.282880755608028) internal successors, (27806), 8470 states have internal predecessors, (27806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 27806 transitions. [2021-04-15 02:23:34,771 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 27806 transitions. Word has length 20 [2021-04-15 02:23:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:34,771 INFO L480 AbstractCegarLoop]: Abstraction has 8471 states and 27806 transitions. [2021-04-15 02:23:34,771 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) [2021-04-15 02:23:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 27806 transitions. [2021-04-15 02:23:34,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:34,776 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:34,776 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:34,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-04-15 02:23:34,978 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash -339144456, now seen corresponding path program 145 times [2021-04-15 02:23:34,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:34,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871679281] [2021-04-15 02:23:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871679281] [2021-04-15 02:23:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744052168] [2021-04-15 02:23:35,037 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 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 [2021-04-15 02:23:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:35,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:35,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:35,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:35,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:35,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048362824] [2021-04-15 02:23:35,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:35,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:35,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:35,094 INFO L87 Difference]: Start difference. First operand 8471 states and 27806 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) [2021-04-15 02:23:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:35,192 INFO L93 Difference]: Finished difference Result 8734 states and 28233 transitions. [2021-04-15 02:23:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 02:23:35,192 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 [2021-04-15 02:23:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:35,204 INFO L225 Difference]: With dead ends: 8734 [2021-04-15 02:23:35,204 INFO L226 Difference]: Without dead ends: 8734 [2021-04-15 02:23:35,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8734 states. [2021-04-15 02:23:35,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8734 to 8472. [2021-04-15 02:23:35,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 3.282611261952544) internal successors, (27807), 8471 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 27807 transitions. [2021-04-15 02:23:35,319 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 27807 transitions. Word has length 20 [2021-04-15 02:23:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:35,319 INFO L480 AbstractCegarLoop]: Abstraction has 8472 states and 27807 transitions. [2021-04-15 02:23:35,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:35,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 27807 transitions. [2021-04-15 02:23:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:35,324 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:35,324 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:35,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:35,525 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2068191790, now seen corresponding path program 146 times [2021-04-15 02:23:35,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:35,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145065028] [2021-04-15 02:23:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:35,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145065028] [2021-04-15 02:23:35,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511385997] [2021-04-15 02:23:35,580 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 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 [2021-04-15 02:23:35,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:35,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:35,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:35,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:35,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:35,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:35,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214833675] [2021-04-15 02:23:35,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:35,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:35,650 INFO L87 Difference]: Start difference. First operand 8472 states and 27807 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) [2021-04-15 02:23:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:35,785 INFO L93 Difference]: Finished difference Result 8819 states and 28448 transitions. [2021-04-15 02:23:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:35,785 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 [2021-04-15 02:23:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:35,799 INFO L225 Difference]: With dead ends: 8819 [2021-04-15 02:23:35,799 INFO L226 Difference]: Without dead ends: 8819 [2021-04-15 02:23:35,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-04-15 02:23:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8488. [2021-04-15 02:23:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 8487 states have (on average 3.2818428184281845) internal successors, (27853), 8487 states have internal predecessors, (27853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:36,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 27853 transitions. [2021-04-15 02:23:36,008 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 27853 transitions. Word has length 20 [2021-04-15 02:23:36,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:36,008 INFO L480 AbstractCegarLoop]: Abstraction has 8488 states and 27853 transitions. [2021-04-15 02:23:36,008 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) [2021-04-15 02:23:36,008 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 27853 transitions. [2021-04-15 02:23:36,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:36,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:36,014 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:36,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:36,214 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:36,215 INFO L82 PathProgramCache]: Analyzing trace with hash 165915704, now seen corresponding path program 147 times [2021-04-15 02:23:36,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:36,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573558703] [2021-04-15 02:23:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573558703] [2021-04-15 02:23:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339905173] [2021-04-15 02:23:36,283 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 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 [2021-04-15 02:23:36,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:36,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:36,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:36,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:36,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499807666] [2021-04-15 02:23:36,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:36,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:36,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:36,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:36,355 INFO L87 Difference]: Start difference. First operand 8488 states and 27853 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) [2021-04-15 02:23:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:36,496 INFO L93 Difference]: Finished difference Result 10243 states and 33004 transitions. [2021-04-15 02:23:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:23:36,496 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 [2021-04-15 02:23:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:36,510 INFO L225 Difference]: With dead ends: 10243 [2021-04-15 02:23:36,511 INFO L226 Difference]: Without dead ends: 10243 [2021-04-15 02:23:36,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:36,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-04-15 02:23:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9399. [2021-04-15 02:23:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.282932538838051) internal successors, (30853), 9398 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 30853 transitions. [2021-04-15 02:23:36,640 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 30853 transitions. Word has length 20 [2021-04-15 02:23:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:36,640 INFO L480 AbstractCegarLoop]: Abstraction has 9399 states and 30853 transitions. [2021-04-15 02:23:36,640 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) [2021-04-15 02:23:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 30853 transitions. [2021-04-15 02:23:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:36,645 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:36,645 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:36,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:36,846 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:36,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:36,846 INFO L82 PathProgramCache]: Analyzing trace with hash 703771282, now seen corresponding path program 148 times [2021-04-15 02:23:36,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:36,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338269221] [2021-04-15 02:23:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:36,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338269221] [2021-04-15 02:23:36,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742646472] [2021-04-15 02:23:36,908 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 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 [2021-04-15 02:23:36,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:36,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:36,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:36,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476807705] [2021-04-15 02:23:36,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:36,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:36,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:36,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:36,982 INFO L87 Difference]: Start difference. First operand 9399 states and 30853 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) [2021-04-15 02:23:37,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:37,117 INFO L93 Difference]: Finished difference Result 10149 states and 32809 transitions. [2021-04-15 02:23:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:23:37,117 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 [2021-04-15 02:23:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:37,133 INFO L225 Difference]: With dead ends: 10149 [2021-04-15 02:23:37,133 INFO L226 Difference]: Without dead ends: 10149 [2021-04-15 02:23:37,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:37,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-04-15 02:23:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 9884. [2021-04-15 02:23:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 9883 states have (on average 3.274208236365476) internal successors, (32359), 9883 states have internal predecessors, (32359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 32359 transitions. [2021-04-15 02:23:37,274 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 32359 transitions. Word has length 20 [2021-04-15 02:23:37,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:37,274 INFO L480 AbstractCegarLoop]: Abstraction has 9884 states and 32359 transitions. [2021-04-15 02:23:37,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 32359 transitions. [2021-04-15 02:23:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:37,280 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:37,280 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:37,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3346 [2021-04-15 02:23:37,481 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 197425016, now seen corresponding path program 149 times [2021-04-15 02:23:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:37,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127288855] [2021-04-15 02:23:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:37,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127288855] [2021-04-15 02:23:37,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678412180] [2021-04-15 02:23:37,538 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 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 [2021-04-15 02:23:37,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:23:37,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:37,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:37,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:37,609 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:37,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:37,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-04-15 02:23:37,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309077607] [2021-04-15 02:23:37,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:37,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:37,610 INFO L87 Difference]: Start difference. First operand 9884 states and 32359 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) [2021-04-15 02:23:37,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:37,705 INFO L93 Difference]: Finished difference Result 10072 states and 32751 transitions. [2021-04-15 02:23:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:23:37,705 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 [2021-04-15 02:23:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:37,717 INFO L225 Difference]: With dead ends: 10072 [2021-04-15 02:23:37,717 INFO L226 Difference]: Without dead ends: 10072 [2021-04-15 02:23:37,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-04-15 02:23:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-04-15 02:23:37,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9967. [2021-04-15 02:23:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 3.2728276138872165) internal successors, (32617), 9966 states have internal predecessors, (32617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 32617 transitions. [2021-04-15 02:23:37,838 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 32617 transitions. Word has length 20 [2021-04-15 02:23:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:37,838 INFO L480 AbstractCegarLoop]: Abstraction has 9967 states and 32617 transitions. [2021-04-15 02:23:37,838 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) [2021-04-15 02:23:37,839 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 32617 transitions. [2021-04-15 02:23:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:37,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:37,844 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:38,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3347,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:38,044 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1680559954, now seen corresponding path program 150 times [2021-04-15 02:23:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:38,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610282993] [2021-04-15 02:23:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:38,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610282993] [2021-04-15 02:23:38,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078617098] [2021-04-15 02:23:38,107 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 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 [2021-04-15 02:23:38,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:38,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:38,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:38,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:38,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:38,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359529133] [2021-04-15 02:23:38,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:38,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:38,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:38,172 INFO L87 Difference]: Start difference. First operand 9967 states and 32617 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) [2021-04-15 02:23:38,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:38,374 INFO L93 Difference]: Finished difference Result 10101 states and 32808 transitions. [2021-04-15 02:23:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:23:38,375 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 20 [2021-04-15 02:23:38,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:38,388 INFO L225 Difference]: With dead ends: 10101 [2021-04-15 02:23:38,388 INFO L226 Difference]: Without dead ends: 10101 [2021-04-15 02:23:38,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:23:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-04-15 02:23:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9954. [2021-04-15 02:23:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 3.2730834924143473) internal successors, (32577), 9953 states have internal predecessors, (32577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 32577 transitions. [2021-04-15 02:23:38,519 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 32577 transitions. Word has length 20 [2021-04-15 02:23:38,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:38,519 INFO L480 AbstractCegarLoop]: Abstraction has 9954 states and 32577 transitions. [2021-04-15 02:23:38,519 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) [2021-04-15 02:23:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 32577 transitions. [2021-04-15 02:23:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:38,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:38,525 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:38,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3348 [2021-04-15 02:23:38,725 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:38,726 INFO L82 PathProgramCache]: Analyzing trace with hash 413102776, now seen corresponding path program 151 times [2021-04-15 02:23:38,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:38,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528456586] [2021-04-15 02:23:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:38,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528456586] [2021-04-15 02:23:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003360808] [2021-04-15 02:23:38,794 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 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 [2021-04-15 02:23:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:38,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:38,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:38,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:38,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718617877] [2021-04-15 02:23:38,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:38,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:38,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:38,919 INFO L87 Difference]: Start difference. First operand 9954 states and 32577 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) [2021-04-15 02:23:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:39,119 INFO L93 Difference]: Finished difference Result 10116 states and 32868 transitions. [2021-04-15 02:23:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:39,119 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 20 [2021-04-15 02:23:39,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:39,132 INFO L225 Difference]: With dead ends: 10116 [2021-04-15 02:23:39,133 INFO L226 Difference]: Without dead ends: 10116 [2021-04-15 02:23:39,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 167.5ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-04-15 02:23:39,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9959. [2021-04-15 02:23:39,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 3.272845953002611) internal successors, (32591), 9958 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 32591 transitions. [2021-04-15 02:23:39,254 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 32591 transitions. Word has length 20 [2021-04-15 02:23:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:39,254 INFO L480 AbstractCegarLoop]: Abstraction has 9959 states and 32591 transitions. [2021-04-15 02:23:39,254 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) [2021-04-15 02:23:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 32591 transitions. [2021-04-15 02:23:39,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:39,259 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:39,259 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:39,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:39,460 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -223364078, now seen corresponding path program 152 times [2021-04-15 02:23:39,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:39,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629853638] [2021-04-15 02:23:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:39,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629853638] [2021-04-15 02:23:39,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658935053] [2021-04-15 02:23:39,533 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 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 [2021-04-15 02:23:39,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:39,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:39,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:39,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:39,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201476310] [2021-04-15 02:23:39,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:39,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:39,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:39,595 INFO L87 Difference]: Start difference. First operand 9959 states and 32591 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) [2021-04-15 02:23:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:39,825 INFO L93 Difference]: Finished difference Result 10234 states and 33185 transitions. [2021-04-15 02:23:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 02:23:39,825 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 20 [2021-04-15 02:23:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:39,840 INFO L225 Difference]: With dead ends: 10234 [2021-04-15 02:23:39,840 INFO L226 Difference]: Without dead ends: 10234 [2021-04-15 02:23:39,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-04-15 02:23:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-04-15 02:23:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 9965. [2021-04-15 02:23:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9965 states, 9964 states have (on average 3.2725812926535527) internal successors, (32608), 9964 states have internal predecessors, (32608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:39,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9965 states to 9965 states and 32608 transitions. [2021-04-15 02:23:39,977 INFO L78 Accepts]: Start accepts. Automaton has 9965 states and 32608 transitions. Word has length 20 [2021-04-15 02:23:39,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:39,977 INFO L480 AbstractCegarLoop]: Abstraction has 9965 states and 32608 transitions. [2021-04-15 02:23:39,977 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) [2021-04-15 02:23:39,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9965 states and 32608 transitions. [2021-04-15 02:23:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-04-15 02:23:39,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:39,982 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:40,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3350,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:40,183 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:40,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:40,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1520999928, now seen corresponding path program 153 times [2021-04-15 02:23:40,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:40,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505476447] [2021-04-15 02:23:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505476447] [2021-04-15 02:23:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159948269] [2021-04-15 02:23:40,260 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 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 [2021-04-15 02:23:40,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:40,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:40,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:40,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:40,325 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:40,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:40,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:40,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861496551] [2021-04-15 02:23:40,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:40,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:40,326 INFO L87 Difference]: Start difference. First operand 9965 states and 32608 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) [2021-04-15 02:23:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:40,597 INFO L93 Difference]: Finished difference Result 10435 states and 33779 transitions. [2021-04-15 02:23:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:23:40,598 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 20 [2021-04-15 02:23:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:40,612 INFO L225 Difference]: With dead ends: 10435 [2021-04-15 02:23:40,612 INFO L226 Difference]: Without dead ends: 10435 [2021-04-15 02:23:40,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 02:23:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-04-15 02:23:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 9964. [2021-04-15 02:23:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.274114222623708) internal successors, (32620), 9963 states have internal predecessors, (32620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32620 transitions. [2021-04-15 02:23:40,734 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32620 transitions. Word has length 20 [2021-04-15 02:23:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:40,734 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32620 transitions. [2021-04-15 02:23:40,734 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) [2021-04-15 02:23:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32620 transitions. [2021-04-15 02:23:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:40,739 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:40,739 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:40,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-04-15 02:23:40,939 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:40,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1811260523, now seen corresponding path program 154 times [2021-04-15 02:23:40,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:40,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41557922] [2021-04-15 02:23:40,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:41,005 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:41,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41557922] [2021-04-15 02:23:41,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098033288] [2021-04-15 02:23:41,006 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 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 [2021-04-15 02:23:41,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:41,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:41,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:41,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:41,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:23:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125957409] [2021-04-15 02:23:41,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:41,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:41,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:41,095 INFO L87 Difference]: Start difference. First operand 9964 states and 32620 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:41,275 INFO L93 Difference]: Finished difference Result 10126 states and 32846 transitions. [2021-04-15 02:23:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:41,290 INFO L225 Difference]: With dead ends: 10126 [2021-04-15 02:23:41,290 INFO L226 Difference]: Without dead ends: 10123 [2021-04-15 02:23:41,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:23:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-04-15 02:23:41,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 9964. [2021-04-15 02:23:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.273511994379203) internal successors, (32614), 9963 states have internal predecessors, (32614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32614 transitions. [2021-04-15 02:23:41,496 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32614 transitions. Word has length 21 [2021-04-15 02:23:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:41,496 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32614 transitions. [2021-04-15 02:23:41,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32614 transitions. [2021-04-15 02:23:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:41,502 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:41,502 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:41,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3352,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:41,703 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 738175143, now seen corresponding path program 155 times [2021-04-15 02:23:41,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:41,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493496675] [2021-04-15 02:23:41,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493496675] [2021-04-15 02:23:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326991713] [2021-04-15 02:23:41,766 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 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 [2021-04-15 02:23:41,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:23:41,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:41,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:41,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:41,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:41,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:41,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63759609] [2021-04-15 02:23:41,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:41,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:41,829 INFO L87 Difference]: Start difference. First operand 9964 states and 32614 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) [2021-04-15 02:23:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:42,016 INFO L93 Difference]: Finished difference Result 10176 states and 33094 transitions. [2021-04-15 02:23:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:42,033 INFO L225 Difference]: With dead ends: 10176 [2021-04-15 02:23:42,034 INFO L226 Difference]: Without dead ends: 10172 [2021-04-15 02:23:42,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:42,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-04-15 02:23:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 9964. [2021-04-15 02:23:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.2733112516310348) internal successors, (32612), 9963 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32612 transitions. [2021-04-15 02:23:42,184 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32612 transitions. Word has length 21 [2021-04-15 02:23:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:42,184 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32612 transitions. [2021-04-15 02:23:42,184 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) [2021-04-15 02:23:42,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32612 transitions. [2021-04-15 02:23:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:42,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:42,190 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:42,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-04-15 02:23:42,391 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1832266731, now seen corresponding path program 156 times [2021-04-15 02:23:42,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:42,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434095987] [2021-04-15 02:23:42,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434095987] [2021-04-15 02:23:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977425566] [2021-04-15 02:23:42,457 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 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 [2021-04-15 02:23:42,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:23:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:42,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:42,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:42,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804494832] [2021-04-15 02:23:42,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:42,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:42,519 INFO L87 Difference]: Start difference. First operand 9964 states and 32612 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) [2021-04-15 02:23:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:42,708 INFO L93 Difference]: Finished difference Result 10153 states and 33062 transitions. [2021-04-15 02:23:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:42,723 INFO L225 Difference]: With dead ends: 10153 [2021-04-15 02:23:42,723 INFO L226 Difference]: Without dead ends: 10148 [2021-04-15 02:23:42,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:42,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-04-15 02:23:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9966. [2021-04-15 02:23:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 3.2727546412443553) internal successors, (32613), 9965 states have internal predecessors, (32613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 32613 transitions. [2021-04-15 02:23:42,862 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 32613 transitions. Word has length 21 [2021-04-15 02:23:42,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:42,862 INFO L480 AbstractCegarLoop]: Abstraction has 9966 states and 32613 transitions. [2021-04-15 02:23:42,862 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) [2021-04-15 02:23:42,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 32613 transitions. [2021-04-15 02:23:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:42,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:42,868 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:43,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:43,068 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash 469064323, now seen corresponding path program 157 times [2021-04-15 02:23:43,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:43,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224881837] [2021-04-15 02:23:43,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:43,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224881837] [2021-04-15 02:23:43,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381401819] [2021-04-15 02:23:43,124 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 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 [2021-04-15 02:23:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:43,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:43,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:43,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114363704] [2021-04-15 02:23:43,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:43,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:43,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:43,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:43,186 INFO L87 Difference]: Start difference. First operand 9966 states and 32613 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) [2021-04-15 02:23:43,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:43,289 INFO L93 Difference]: Finished difference Result 10154 states and 32869 transitions. [2021-04-15 02:23:43,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:43,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:43,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:43,305 INFO L225 Difference]: With dead ends: 10154 [2021-04-15 02:23:43,305 INFO L226 Difference]: Without dead ends: 10152 [2021-04-15 02:23:43,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:43,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2021-04-15 02:23:43,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 9957. [2021-04-15 02:23:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 3.2695861791884293) internal successors, (32552), 9956 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 32552 transitions. [2021-04-15 02:23:43,452 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 32552 transitions. Word has length 21 [2021-04-15 02:23:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:43,452 INFO L480 AbstractCegarLoop]: Abstraction has 9957 states and 32552 transitions. [2021-04-15 02:23:43,452 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) [2021-04-15 02:23:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 32552 transitions. [2021-04-15 02:23:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:43,458 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:43,458 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:43,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3355,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:43,658 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:43,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2085810663, now seen corresponding path program 158 times [2021-04-15 02:23:43,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:43,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159336058] [2021-04-15 02:23:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:43,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159336058] [2021-04-15 02:23:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350772263] [2021-04-15 02:23:43,715 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 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 [2021-04-15 02:23:43,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:43,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:43,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:43,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:43,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:43,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:23:43,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734386867] [2021-04-15 02:23:43,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:43,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:43,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:43,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:43,775 INFO L87 Difference]: Start difference. First operand 9957 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:23:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:43,909 INFO L93 Difference]: Finished difference Result 10120 states and 32729 transitions. [2021-04-15 02:23:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:43,909 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-04-15 02:23:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:43,927 INFO L225 Difference]: With dead ends: 10120 [2021-04-15 02:23:43,927 INFO L226 Difference]: Without dead ends: 10120 [2021-04-15 02:23:43,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2021-04-15 02:23:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9951. [2021-04-15 02:23:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.2641206030150753) internal successors, (32478), 9950 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 32478 transitions. [2021-04-15 02:23:44,084 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 32478 transitions. Word has length 21 [2021-04-15 02:23:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:44,085 INFO L480 AbstractCegarLoop]: Abstraction has 9951 states and 32478 transitions. [2021-04-15 02:23:44,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:23:44,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 32478 transitions. [2021-04-15 02:23:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:44,149 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:44,149 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:44,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:44,350 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:44,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -375197355, now seen corresponding path program 159 times [2021-04-15 02:23:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:44,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737246647] [2021-04-15 02:23:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:44,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737246647] [2021-04-15 02:23:44,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204546766] [2021-04-15 02:23:44,430 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 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 [2021-04-15 02:23:44,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:44,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:44,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:44,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268290836] [2021-04-15 02:23:44,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:44,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:44,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:44,499 INFO L87 Difference]: Start difference. First operand 9951 states and 32478 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) [2021-04-15 02:23:44,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:44,678 INFO L93 Difference]: Finished difference Result 10112 states and 32702 transitions. [2021-04-15 02:23:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:44,697 INFO L225 Difference]: With dead ends: 10112 [2021-04-15 02:23:44,697 INFO L226 Difference]: Without dead ends: 10109 [2021-04-15 02:23:44,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:44,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2021-04-15 02:23:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 9943. [2021-04-15 02:23:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.2572922953128143) internal successors, (32384), 9942 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32384 transitions. [2021-04-15 02:23:44,831 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32384 transitions. Word has length 21 [2021-04-15 02:23:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32384 transitions. [2021-04-15 02:23:44,831 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) [2021-04-15 02:23:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32384 transitions. [2021-04-15 02:23:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:44,836 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:44,836 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:45,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:45,037 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1114207641, now seen corresponding path program 160 times [2021-04-15 02:23:45,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:45,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312151807] [2021-04-15 02:23:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:45,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:45,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312151807] [2021-04-15 02:23:45,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225559127] [2021-04-15 02:23:45,106 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 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 [2021-04-15 02:23:45,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:45,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:45,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:23:45,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329099173] [2021-04-15 02:23:45,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:45,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:45,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:45,168 INFO L87 Difference]: Start difference. First operand 9943 states and 32384 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:45,346 INFO L93 Difference]: Finished difference Result 10108 states and 32615 transitions. [2021-04-15 02:23:45,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:45,360 INFO L225 Difference]: With dead ends: 10108 [2021-04-15 02:23:45,360 INFO L226 Difference]: Without dead ends: 10105 [2021-04-15 02:23:45,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-04-15 02:23:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 9943. [2021-04-15 02:23:45,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256588211627439) internal successors, (32377), 9942 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32377 transitions. [2021-04-15 02:23:45,507 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32377 transitions. Word has length 21 [2021-04-15 02:23:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:45,507 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32377 transitions. [2021-04-15 02:23:45,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32377 transitions. [2021-04-15 02:23:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:45,514 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:45,514 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:45,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:45,714 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:45,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash 41122261, now seen corresponding path program 161 times [2021-04-15 02:23:45,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:45,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386883640] [2021-04-15 02:23:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:45,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386883640] [2021-04-15 02:23:45,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683618518] [2021-04-15 02:23:45,784 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 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 [2021-04-15 02:23:45,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:23:45,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:45,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:45,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:45,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:23:45,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267452032] [2021-04-15 02:23:45,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:45,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:45,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:45,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:45,849 INFO L87 Difference]: Start difference. First operand 9943 states and 32377 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:46,033 INFO L93 Difference]: Finished difference Result 10188 states and 32924 transitions. [2021-04-15 02:23:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:46,045 INFO L225 Difference]: With dead ends: 10188 [2021-04-15 02:23:46,045 INFO L226 Difference]: Without dead ends: 10184 [2021-04-15 02:23:46,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:46,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-04-15 02:23:46,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9943. [2021-04-15 02:23:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256487628243814) internal successors, (32376), 9942 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32376 transitions. [2021-04-15 02:23:46,176 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32376 transitions. Word has length 21 [2021-04-15 02:23:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:46,176 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32376 transitions. [2021-04-15 02:23:46,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32376 transitions. [2021-04-15 02:23:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:46,181 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:46,181 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:46,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:46,382 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:46,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1135213849, now seen corresponding path program 162 times [2021-04-15 02:23:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:46,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535414399] [2021-04-15 02:23:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535414399] [2021-04-15 02:23:46,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847946783] [2021-04-15 02:23:46,454 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 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 [2021-04-15 02:23:46,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:46,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:46,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:46,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:46,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:46,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:23:46,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927903426] [2021-04-15 02:23:46,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:46,510 INFO L87 Difference]: Start difference. First operand 9943 states and 32376 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) [2021-04-15 02:23:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:46,691 INFO L93 Difference]: Finished difference Result 10178 states and 32911 transitions. [2021-04-15 02:23:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:46,706 INFO L225 Difference]: With dead ends: 10178 [2021-04-15 02:23:46,706 INFO L226 Difference]: Without dead ends: 10173 [2021-04-15 02:23:46,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:46,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-04-15 02:23:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9943. [2021-04-15 02:23:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256387044860189) internal successors, (32375), 9942 states have internal predecessors, (32375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:46,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32375 transitions. [2021-04-15 02:23:46,916 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32375 transitions. Word has length 21 [2021-04-15 02:23:46,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:46,916 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32375 transitions. [2021-04-15 02:23:46,916 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) [2021-04-15 02:23:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32375 transitions. [2021-04-15 02:23:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:46,922 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:46,922 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:47,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-04-15 02:23:47,122 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash 692314709, now seen corresponding path program 163 times [2021-04-15 02:23:47,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:47,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386002998] [2021-04-15 02:23:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:47,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386002998] [2021-04-15 02:23:47,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075059364] [2021-04-15 02:23:47,206 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 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 [2021-04-15 02:23:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:47,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:47,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:23:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413178601] [2021-04-15 02:23:47,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:47,264 INFO L87 Difference]: Start difference. First operand 9943 states and 32375 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:47,465 INFO L93 Difference]: Finished difference Result 10151 states and 32872 transitions. [2021-04-15 02:23:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:47,483 INFO L225 Difference]: With dead ends: 10151 [2021-04-15 02:23:47,483 INFO L226 Difference]: Without dead ends: 10145 [2021-04-15 02:23:47,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 149.6ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-04-15 02:23:47,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9945. [2021-04-15 02:23:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9944 states have (on average 3.255832662912309) internal successors, (32376), 9944 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 32376 transitions. [2021-04-15 02:23:47,649 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 32376 transitions. Word has length 21 [2021-04-15 02:23:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:47,649 INFO L480 AbstractCegarLoop]: Abstraction has 9945 states and 32376 transitions. [2021-04-15 02:23:47,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:47,649 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 32376 transitions. [2021-04-15 02:23:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:47,655 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:47,655 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:47,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-04-15 02:23:47,855 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:47,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:47,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1359739827, now seen corresponding path program 164 times [2021-04-15 02:23:47,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:47,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614945336] [2021-04-15 02:23:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:47,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614945336] [2021-04-15 02:23:47,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959210126] [2021-04-15 02:23:47,912 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 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 [2021-04-15 02:23:47,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:47,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:23:47,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:47,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-04-15 02:23:47,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504018298] [2021-04-15 02:23:47,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 02:23:47,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 02:23:47,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:23:47,977 INFO L87 Difference]: Start difference. First operand 9945 states and 32376 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:48,098 INFO L93 Difference]: Finished difference Result 10106 states and 32713 transitions. [2021-04-15 02:23:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:48,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:48,113 INFO L225 Difference]: With dead ends: 10106 [2021-04-15 02:23:48,113 INFO L226 Difference]: Without dead ends: 10106 [2021-04-15 02:23:48,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-04-15 02:23:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-04-15 02:23:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9975. [2021-04-15 02:23:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2557649889713254) internal successors, (32473), 9974 states have internal predecessors, (32473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32473 transitions. [2021-04-15 02:23:48,239 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32473 transitions. Word has length 21 [2021-04-15 02:23:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:48,239 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32473 transitions. [2021-04-15 02:23:48,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32473 transitions. [2021-04-15 02:23:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:48,245 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:48,245 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:48,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3362,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:48,446 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:48,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:48,446 INFO L82 PathProgramCache]: Analyzing trace with hash 328108493, now seen corresponding path program 165 times [2021-04-15 02:23:48,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:48,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87333144] [2021-04-15 02:23:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:48,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87333144] [2021-04-15 02:23:48,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072406240] [2021-04-15 02:23:48,508 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 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 [2021-04-15 02:23:48,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:48,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:48,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:48,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:48,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082239980] [2021-04-15 02:23:48,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:48,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:48,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:48,564 INFO L87 Difference]: Start difference. First operand 9975 states and 32473 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:48,709 INFO L93 Difference]: Finished difference Result 10155 states and 32890 transitions. [2021-04-15 02:23:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:23:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:48,722 INFO L225 Difference]: With dead ends: 10155 [2021-04-15 02:23:48,722 INFO L226 Difference]: Without dead ends: 10151 [2021-04-15 02:23:48,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:23:48,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-04-15 02:23:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9975. [2021-04-15 02:23:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.255564467615801) internal successors, (32471), 9974 states have internal predecessors, (32471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32471 transitions. [2021-04-15 02:23:48,849 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32471 transitions. Word has length 21 [2021-04-15 02:23:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:48,849 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32471 transitions. [2021-04-15 02:23:48,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32471 transitions. [2021-04-15 02:23:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:48,856 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:48,856 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:49,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-04-15 02:23:49,069 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1811243431, now seen corresponding path program 166 times [2021-04-15 02:23:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:49,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758606000] [2021-04-15 02:23:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:49,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758606000] [2021-04-15 02:23:49,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861704351] [2021-04-15 02:23:49,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:23:49,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:49,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:49,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:49,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:23:49,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949517851] [2021-04-15 02:23:49,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:49,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:49,185 INFO L87 Difference]: Start difference. First operand 9975 states and 32471 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) [2021-04-15 02:23:49,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:49,376 INFO L93 Difference]: Finished difference Result 10215 states and 32971 transitions. [2021-04-15 02:23:49,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:49,376 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 [2021-04-15 02:23:49,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:49,390 INFO L225 Difference]: With dead ends: 10215 [2021-04-15 02:23:49,390 INFO L226 Difference]: Without dead ends: 10211 [2021-04-15 02:23:49,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-04-15 02:23:49,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9975. [2021-04-15 02:23:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2551634249047523) internal successors, (32467), 9974 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:49,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32467 transitions. [2021-04-15 02:23:49,521 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32467 transitions. Word has length 21 [2021-04-15 02:23:49,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:49,522 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32467 transitions. [2021-04-15 02:23:49,522 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) [2021-04-15 02:23:49,522 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32467 transitions. [2021-04-15 02:23:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:49,527 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:49,527 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:49,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3364 [2021-04-15 02:23:49,727 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:49,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1389632277, now seen corresponding path program 167 times [2021-04-15 02:23:49,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:49,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176511300] [2021-04-15 02:23:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:49,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176511300] [2021-04-15 02:23:49,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977908289] [2021-04-15 02:23:49,793 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 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 [2021-04-15 02:23:49,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:49,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:49,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:49,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:49,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:49,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:23:49,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106767309] [2021-04-15 02:23:49,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:49,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:49,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:49,866 INFO L87 Difference]: Start difference. First operand 9975 states and 32467 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:50,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:50,092 INFO L93 Difference]: Finished difference Result 10242 states and 33109 transitions. [2021-04-15 02:23:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:23:50,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:50,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:50,107 INFO L225 Difference]: With dead ends: 10242 [2021-04-15 02:23:50,107 INFO L226 Difference]: Without dead ends: 10237 [2021-04-15 02:23:50,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:23:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-04-15 02:23:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 9984. [2021-04-15 02:23:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.254332365020535) internal successors, (32488), 9983 states have internal predecessors, (32488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32488 transitions. [2021-04-15 02:23:50,308 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32488 transitions. Word has length 21 [2021-04-15 02:23:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:50,309 INFO L480 AbstractCegarLoop]: Abstraction has 9984 states and 32488 transitions. [2021-04-15 02:23:50,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32488 transitions. [2021-04-15 02:23:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:50,315 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:50,315 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:50,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:50,515 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:50,516 INFO L82 PathProgramCache]: Analyzing trace with hash 543786253, now seen corresponding path program 168 times [2021-04-15 02:23:50,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:50,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80823739] [2021-04-15 02:23:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80823739] [2021-04-15 02:23:50,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450641653] [2021-04-15 02:23:50,617 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 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 [2021-04-15 02:23:50,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:23:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:50,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:50,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:50,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:23:50,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395044644] [2021-04-15 02:23:50,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:50,674 INFO L87 Difference]: Start difference. First operand 9984 states and 32488 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) [2021-04-15 02:23:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:50,853 INFO L93 Difference]: Finished difference Result 10254 states and 33040 transitions. [2021-04-15 02:23:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:50,870 INFO L225 Difference]: With dead ends: 10254 [2021-04-15 02:23:50,870 INFO L226 Difference]: Without dead ends: 10250 [2021-04-15 02:23:50,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-04-15 02:23:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9984. [2021-04-15 02:23:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.253731343283582) internal successors, (32482), 9983 states have internal predecessors, (32482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32482 transitions. [2021-04-15 02:23:51,017 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32482 transitions. Word has length 21 [2021-04-15 02:23:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:51,017 INFO L480 AbstractCegarLoop]: Abstraction has 9984 states and 32482 transitions. [2021-04-15 02:23:51,017 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) [2021-04-15 02:23:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32482 transitions. [2021-04-15 02:23:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:51,022 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:51,022 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:51,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:51,223 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:51,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:51,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1637877841, now seen corresponding path program 169 times [2021-04-15 02:23:51,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:51,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374656264] [2021-04-15 02:23:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:51,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374656264] [2021-04-15 02:23:51,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56633408] [2021-04-15 02:23:51,292 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 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 [2021-04-15 02:23:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:51,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:51,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:51,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:23:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442105314] [2021-04-15 02:23:51,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:51,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:51,345 INFO L87 Difference]: Start difference. First operand 9984 states and 32482 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:51,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:51,523 INFO L93 Difference]: Finished difference Result 10346 states and 33347 transitions. [2021-04-15 02:23:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:51,536 INFO L225 Difference]: With dead ends: 10346 [2021-04-15 02:23:51,536 INFO L226 Difference]: Without dead ends: 10341 [2021-04-15 02:23:51,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:23:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-04-15 02:23:51,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9986. [2021-04-15 02:23:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 3.25378067100651) internal successors, (32489), 9985 states have internal predecessors, (32489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 32489 transitions. [2021-04-15 02:23:51,666 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 32489 transitions. Word has length 21 [2021-04-15 02:23:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:51,666 INFO L480 AbstractCegarLoop]: Abstraction has 9986 states and 32489 transitions. [2021-04-15 02:23:51,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:51,666 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 32489 transitions. [2021-04-15 02:23:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:51,672 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:51,672 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:51,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3367 [2021-04-15 02:23:51,872 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:51,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1194978701, now seen corresponding path program 170 times [2021-04-15 02:23:51,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:51,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887268647] [2021-04-15 02:23:51,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:51,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887268647] [2021-04-15 02:23:51,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490975300] [2021-04-15 02:23:51,959 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 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 [2021-04-15 02:23:51,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:51,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:52,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:52,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:23:52,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273557022] [2021-04-15 02:23:52,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:52,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:52,023 INFO L87 Difference]: Start difference. First operand 9986 states and 32489 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:52,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:52,258 INFO L93 Difference]: Finished difference Result 10320 states and 33310 transitions. [2021-04-15 02:23:52,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:52,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:52,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:52,278 INFO L225 Difference]: With dead ends: 10320 [2021-04-15 02:23:52,279 INFO L226 Difference]: Without dead ends: 10314 [2021-04-15 02:23:52,279 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:23:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2021-04-15 02:23:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 9996. [2021-04-15 02:23:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9996 states, 9995 states have (on average 3.253126563281641) internal successors, (32515), 9995 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9996 states to 9996 states and 32515 transitions. [2021-04-15 02:23:52,487 INFO L78 Accepts]: Start accepts. Automaton has 9996 states and 32515 transitions. Word has length 21 [2021-04-15 02:23:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:52,487 INFO L480 AbstractCegarLoop]: Abstraction has 9996 states and 32515 transitions. [2021-04-15 02:23:52,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 9996 states and 32515 transitions. [2021-04-15 02:23:52,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:52,495 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:52,495 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:52,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:52,716 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:52,717 INFO L82 PathProgramCache]: Analyzing trace with hash 335261461, now seen corresponding path program 171 times [2021-04-15 02:23:52,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:52,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476724027] [2021-04-15 02:23:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:52,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476724027] [2021-04-15 02:23:52,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801794335] [2021-04-15 02:23:52,780 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 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 [2021-04-15 02:23:52,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:52,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:52,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:52,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:52,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:52,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:23:52,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233187020] [2021-04-15 02:23:52,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:23:52,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:52,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:23:52,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:23:52,854 INFO L87 Difference]: Start difference. First operand 9996 states and 32515 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) [2021-04-15 02:23:52,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:52,946 INFO L93 Difference]: Finished difference Result 10199 states and 32826 transitions. [2021-04-15 02:23:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:52,960 INFO L225 Difference]: With dead ends: 10199 [2021-04-15 02:23:52,961 INFO L226 Difference]: Without dead ends: 10199 [2021-04-15 02:23:52,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-04-15 02:23:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 10005. [2021-04-15 02:23:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2531987205117954) internal successors, (32545), 10004 states have internal predecessors, (32545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:53,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32545 transitions. [2021-04-15 02:23:53,096 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32545 transitions. Word has length 21 [2021-04-15 02:23:53,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:53,096 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32545 transitions. [2021-04-15 02:23:53,096 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) [2021-04-15 02:23:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32545 transitions. [2021-04-15 02:23:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:53,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:53,102 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:53,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:53,302 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:53,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2075353771, now seen corresponding path program 172 times [2021-04-15 02:23:53,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:53,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129288899] [2021-04-15 02:23:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:53,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129288899] [2021-04-15 02:23:53,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46587646] [2021-04-15 02:23:53,356 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 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 [2021-04-15 02:23:53,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:53,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:53,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:23:53,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590092795] [2021-04-15 02:23:53,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:53,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:53,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:53,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:53,414 INFO L87 Difference]: Start difference. First operand 10005 states and 32545 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:23:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:53,512 INFO L93 Difference]: Finished difference Result 10191 states and 32796 transitions. [2021-04-15 02:23:53,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:23:53,513 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-04-15 02:23:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:53,526 INFO L225 Difference]: With dead ends: 10191 [2021-04-15 02:23:53,526 INFO L226 Difference]: Without dead ends: 10191 [2021-04-15 02:23:53,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 02:23:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2021-04-15 02:23:53,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10005. [2021-04-15 02:23:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.251799280287885) internal successors, (32531), 10004 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32531 transitions. [2021-04-15 02:23:53,712 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32531 transitions. Word has length 21 [2021-04-15 02:23:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:53,712 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32531 transitions. [2021-04-15 02:23:53,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:23:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32531 transitions. [2021-04-15 02:23:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:53,718 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:53,718 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:53,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3370,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:53,918 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -509000217, now seen corresponding path program 173 times [2021-04-15 02:23:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:53,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223215854] [2021-04-15 02:23:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223215854] [2021-04-15 02:23:53,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924322374] [2021-04-15 02:23:53,977 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 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 [2021-04-15 02:23:53,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:23:53,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:54,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:54,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:23:54,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264613366] [2021-04-15 02:23:54,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:54,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:54,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:54,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:54,032 INFO L87 Difference]: Start difference. First operand 10005 states and 32531 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:23:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:54,214 INFO L93 Difference]: Finished difference Result 10188 states and 32786 transitions. [2021-04-15 02:23:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-04-15 02:23:54,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:54,231 INFO L225 Difference]: With dead ends: 10188 [2021-04-15 02:23:54,232 INFO L226 Difference]: Without dead ends: 10186 [2021-04-15 02:23:54,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-04-15 02:23:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10005. [2021-04-15 02:23:54,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.249000399840064) internal successors, (32503), 10004 states have internal predecessors, (32503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32503 transitions. [2021-04-15 02:23:54,387 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32503 transitions. Word has length 21 [2021-04-15 02:23:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:54,387 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32503 transitions. [2021-04-15 02:23:54,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:23:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32503 transitions. [2021-04-15 02:23:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:54,393 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:54,393 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:54,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-04-15 02:23:54,594 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:54,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash 980404779, now seen corresponding path program 174 times [2021-04-15 02:23:54,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:54,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355183784] [2021-04-15 02:23:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:54,654 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:54,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355183784] [2021-04-15 02:23:54,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532491834] [2021-04-15 02:23:54,654 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 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 [2021-04-15 02:23:54,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:23:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:54,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:54,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:54,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:23:54,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093803879] [2021-04-15 02:23:54,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:54,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:54,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:54,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:54,716 INFO L87 Difference]: Start difference. First operand 10005 states and 32503 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) [2021-04-15 02:23:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:54,910 INFO L93 Difference]: Finished difference Result 10193 states and 32765 transitions. [2021-04-15 02:23:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:23:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:54,926 INFO L225 Difference]: With dead ends: 10193 [2021-04-15 02:23:54,926 INFO L226 Difference]: Without dead ends: 10190 [2021-04-15 02:23:54,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-04-15 02:23:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 10005. [2021-04-15 02:23:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2486005597760896) internal successors, (32499), 10004 states have internal predecessors, (32499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:55,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32499 transitions. [2021-04-15 02:23:55,059 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32499 transitions. Word has length 21 [2021-04-15 02:23:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:55,060 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32499 transitions. [2021-04-15 02:23:55,060 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) [2021-04-15 02:23:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32499 transitions. [2021-04-15 02:23:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:55,065 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:55,065 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:55,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-04-15 02:23:55,267 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:55,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:55,267 INFO L82 PathProgramCache]: Analyzing trace with hash -92680601, now seen corresponding path program 175 times [2021-04-15 02:23:55,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:55,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474558833] [2021-04-15 02:23:55,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:55,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474558833] [2021-04-15 02:23:55,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881313576] [2021-04-15 02:23:55,335 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 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 [2021-04-15 02:23:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:55,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:55,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:55,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:23:55,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71891031] [2021-04-15 02:23:55,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:55,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:55,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:55,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:55,394 INFO L87 Difference]: Start difference. First operand 10005 states and 32499 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) [2021-04-15 02:23:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:55,607 INFO L93 Difference]: Finished difference Result 10199 states and 32771 transitions. [2021-04-15 02:23:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:55,608 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 21 [2021-04-15 02:23:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:55,624 INFO L225 Difference]: With dead ends: 10199 [2021-04-15 02:23:55,624 INFO L226 Difference]: Without dead ends: 10195 [2021-04-15 02:23:55,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:23:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10195 states. [2021-04-15 02:23:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 10005. [2021-04-15 02:23:55,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.248200719712115) internal successors, (32495), 10004 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32495 transitions. [2021-04-15 02:23:55,774 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32495 transitions. Word has length 21 [2021-04-15 02:23:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:55,774 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32495 transitions. [2021-04-15 02:23:55,774 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) [2021-04-15 02:23:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32495 transitions. [2021-04-15 02:23:55,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:55,780 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:55,780 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:55,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-04-15 02:23:55,981 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1001410987, now seen corresponding path program 176 times [2021-04-15 02:23:55,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:55,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128500774] [2021-04-15 02:23:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:56,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128500774] [2021-04-15 02:23:56,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102118666] [2021-04-15 02:23:56,057 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 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 [2021-04-15 02:23:56,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:23:56,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:56,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:56,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:56,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:56,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:23:56,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386979808] [2021-04-15 02:23:56,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:56,136 INFO L87 Difference]: Start difference. First operand 10005 states and 32495 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) [2021-04-15 02:23:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:56,354 INFO L93 Difference]: Finished difference Result 10440 states and 33536 transitions. [2021-04-15 02:23:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:23:56,355 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 21 [2021-04-15 02:23:56,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:56,370 INFO L225 Difference]: With dead ends: 10440 [2021-04-15 02:23:56,370 INFO L226 Difference]: Without dead ends: 10435 [2021-04-15 02:23:56,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-04-15 02:23:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10008. [2021-04-15 02:23:56,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.2482262416308583) internal successors, (32505), 10007 states have internal predecessors, (32505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 32505 transitions. [2021-04-15 02:23:56,511 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 32505 transitions. Word has length 21 [2021-04-15 02:23:56,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:56,511 INFO L480 AbstractCegarLoop]: Abstraction has 10008 states and 32505 transitions. [2021-04-15 02:23:56,511 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) [2021-04-15 02:23:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 32505 transitions. [2021-04-15 02:23:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:56,517 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:56,517 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:56,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-04-15 02:23:56,717 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:56,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:56,717 INFO L82 PathProgramCache]: Analyzing trace with hash 558511847, now seen corresponding path program 177 times [2021-04-15 02:23:56,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:56,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846857439] [2021-04-15 02:23:56,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:56,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846857439] [2021-04-15 02:23:56,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760230467] [2021-04-15 02:23:56,789 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 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 [2021-04-15 02:23:56,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:23:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:56,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:23:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:56,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:56,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:23:56,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734429937] [2021-04-15 02:23:56,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:56,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:56,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:56,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:56,851 INFO L87 Difference]: Start difference. First operand 10008 states and 32505 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:57,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:57,062 INFO L93 Difference]: Finished difference Result 10434 states and 33526 transitions. [2021-04-15 02:23:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:23:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:23:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:57,078 INFO L225 Difference]: With dead ends: 10434 [2021-04-15 02:23:57,078 INFO L226 Difference]: Without dead ends: 10428 [2021-04-15 02:23:57,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-04-15 02:23:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 10011. [2021-04-15 02:23:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.2482517482517483) internal successors, (32515), 10010 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 32515 transitions. [2021-04-15 02:23:57,249 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 32515 transitions. Word has length 21 [2021-04-15 02:23:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:57,249 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 32515 transitions. [2021-04-15 02:23:57,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 32515 transitions. [2021-04-15 02:23:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:57,255 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:57,255 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:57,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-04-15 02:23:57,456 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:57,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash -286459605, now seen corresponding path program 178 times [2021-04-15 02:23:57,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:57,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116717789] [2021-04-15 02:23:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:57,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116717789] [2021-04-15 02:23:57,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087957093] [2021-04-15 02:23:57,533 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 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 [2021-04-15 02:23:57,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:23:57,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:57,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:57,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:23:57,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954205226] [2021-04-15 02:23:57,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:23:57,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:23:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:23:57,594 INFO L87 Difference]: Start difference. First operand 10011 states and 32515 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) [2021-04-15 02:23:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:57,798 INFO L93 Difference]: Finished difference Result 10403 states and 33484 transitions. [2021-04-15 02:23:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:23:57,799 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 21 [2021-04-15 02:23:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:57,812 INFO L225 Difference]: With dead ends: 10403 [2021-04-15 02:23:57,812 INFO L226 Difference]: Without dead ends: 10396 [2021-04-15 02:23:57,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-04-15 02:23:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-04-15 02:23:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10027. [2021-04-15 02:23:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 10026 states have (on average 3.246658687412727) internal successors, (32551), 10026 states have internal predecessors, (32551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:57,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 32551 transitions. [2021-04-15 02:23:57,948 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 32551 transitions. Word has length 21 [2021-04-15 02:23:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:57,948 INFO L480 AbstractCegarLoop]: Abstraction has 10027 states and 32551 transitions. [2021-04-15 02:23:57,948 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) [2021-04-15 02:23:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 32551 transitions. [2021-04-15 02:23:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:57,953 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:57,953 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:58,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:58,154 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:58,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1337942037, now seen corresponding path program 179 times [2021-04-15 02:23:58,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:58,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226740918] [2021-04-15 02:23:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226740918] [2021-04-15 02:23:58,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390304382] [2021-04-15 02:23:58,207 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 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 [2021-04-15 02:23:58,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:23:58,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:58,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 02:23:58,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:58,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-04-15 02:23:58,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743312056] [2021-04-15 02:23:58,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:58,306 INFO L87 Difference]: Start difference. First operand 10027 states and 32551 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-04-15 02:23:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:58,451 INFO L93 Difference]: Finished difference Result 10268 states and 33007 transitions. [2021-04-15 02:23:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:23:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21 [2021-04-15 02:23:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:58,467 INFO L225 Difference]: With dead ends: 10268 [2021-04-15 02:23:58,468 INFO L226 Difference]: Without dead ends: 10268 [2021-04-15 02:23:58,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:23:58,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-04-15 02:23:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10029. [2021-04-15 02:23:58,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.2461108895093735) internal successors, (32552), 10028 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32552 transitions. [2021-04-15 02:23:58,617 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32552 transitions. Word has length 21 [2021-04-15 02:23:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:58,617 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32552 transitions. [2021-04-15 02:23:58,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-04-15 02:23:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32552 transitions. [2021-04-15 02:23:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:58,623 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:58,623 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:58,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:58,823 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1308049587, now seen corresponding path program 180 times [2021-04-15 02:23:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:58,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631530661] [2021-04-15 02:23:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631530661] [2021-04-15 02:23:58,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654726546] [2021-04-15 02:23:58,885 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 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 [2021-04-15 02:23:58,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:23:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:23:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:58,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:23:58,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:58,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:23:58,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963758030] [2021-04-15 02:23:58,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:23:58,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:23:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:23:58,945 INFO L87 Difference]: Start difference. First operand 10029 states and 32552 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) [2021-04-15 02:23:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:59,084 INFO L93 Difference]: Finished difference Result 10257 states and 33080 transitions. [2021-04-15 02:23:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:23:59,085 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 [2021-04-15 02:23:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:59,096 INFO L225 Difference]: With dead ends: 10257 [2021-04-15 02:23:59,097 INFO L226 Difference]: Without dead ends: 10252 [2021-04-15 02:23:59,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:23:59,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-04-15 02:23:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10029. [2021-04-15 02:23:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245911447945752) internal successors, (32550), 10028 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32550 transitions. [2021-04-15 02:23:59,222 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32550 transitions. Word has length 21 [2021-04-15 02:23:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:59,222 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32550 transitions. [2021-04-15 02:23:59,222 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) [2021-04-15 02:23:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32550 transitions. [2021-04-15 02:23:59,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:59,228 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:59,228 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:23:59,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:23:59,428 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:23:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:23:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash 40592409, now seen corresponding path program 181 times [2021-04-15 02:23:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:23:59,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021401407] [2021-04-15 02:23:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:23:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:23:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021401407] [2021-04-15 02:23:59,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068646178] [2021-04-15 02:23:59,497 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 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 [2021-04-15 02:23:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:23:59,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:23:59,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:23:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:23:59,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:23:59,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:23:59,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978195414] [2021-04-15 02:23:59,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:23:59,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:23:59,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:23:59,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:23:59,555 INFO L87 Difference]: Start difference. First operand 10029 states and 32550 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:23:59,730 INFO L93 Difference]: Finished difference Result 10339 states and 33223 transitions. [2021-04-15 02:23:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:23:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:23:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:23:59,746 INFO L225 Difference]: With dead ends: 10339 [2021-04-15 02:23:59,746 INFO L226 Difference]: Without dead ends: 10334 [2021-04-15 02:23:59,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:23:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-04-15 02:23:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10029. [2021-04-15 02:23:59,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245512564818508) internal successors, (32546), 10028 states have internal predecessors, (32546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:23:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32546 transitions. [2021-04-15 02:23:59,886 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32546 transitions. Word has length 21 [2021-04-15 02:23:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:23:59,886 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32546 transitions. [2021-04-15 02:23:59,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:23:59,887 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32546 transitions. [2021-04-15 02:23:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:23:59,892 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:23:59,892 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:00,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3379 [2021-04-15 02:24:00,093 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash -402306731, now seen corresponding path program 182 times [2021-04-15 02:24:00,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:00,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602823073] [2021-04-15 02:24:00,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602823073] [2021-04-15 02:24:00,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106421693] [2021-04-15 02:24:00,164 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 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 [2021-04-15 02:24:00,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:00,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:00,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:00,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:00,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:24:00,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560259734] [2021-04-15 02:24:00,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:00,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:00,219 INFO L87 Difference]: Start difference. First operand 10029 states and 32546 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:00,454 INFO L93 Difference]: Finished difference Result 10400 states and 33463 transitions. [2021-04-15 02:24:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:24:00,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:24:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:00,469 INFO L225 Difference]: With dead ends: 10400 [2021-04-15 02:24:00,469 INFO L226 Difference]: Without dead ends: 10394 [2021-04-15 02:24:00,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-04-15 02:24:00,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 10047. [2021-04-15 02:24:00,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244873581524985) internal successors, (32598), 10046 states have internal predecessors, (32598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32598 transitions. [2021-04-15 02:24:00,608 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32598 transitions. Word has length 21 [2021-04-15 02:24:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:00,608 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 32598 transitions. [2021-04-15 02:24:00,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32598 transitions. [2021-04-15 02:24:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:00,613 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:00,613 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:00,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3380 [2021-04-15 02:24:00,814 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:00,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:00,814 INFO L82 PathProgramCache]: Analyzing trace with hash -595874445, now seen corresponding path program 183 times [2021-04-15 02:24:00,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:00,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881530082] [2021-04-15 02:24:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881530082] [2021-04-15 02:24:00,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324081185] [2021-04-15 02:24:00,886 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 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 [2021-04-15 02:24:00,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:24:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:00,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:00,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:00,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152318969] [2021-04-15 02:24:00,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:00,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:00,963 INFO L87 Difference]: Start difference. First operand 10047 states and 32598 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:01,166 INFO L93 Difference]: Finished difference Result 10336 states and 33135 transitions. [2021-04-15 02:24:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:24:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:24:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:01,184 INFO L225 Difference]: With dead ends: 10336 [2021-04-15 02:24:01,184 INFO L226 Difference]: Without dead ends: 10331 [2021-04-15 02:24:01,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:01,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-04-15 02:24:01,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10047. [2021-04-15 02:24:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244574955206052) internal successors, (32595), 10046 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32595 transitions. [2021-04-15 02:24:01,313 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32595 transitions. Word has length 21 [2021-04-15 02:24:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:01,314 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 32595 transitions. [2021-04-15 02:24:01,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32595 transitions. [2021-04-15 02:24:01,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:01,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:01,319 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:01,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-04-15 02:24:01,519 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1038773585, now seen corresponding path program 184 times [2021-04-15 02:24:01,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:01,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887079987] [2021-04-15 02:24:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:01,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887079987] [2021-04-15 02:24:01,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135040217] [2021-04-15 02:24:01,592 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 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 [2021-04-15 02:24:01,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:01,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:01,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:01,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:01,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:01,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464484436] [2021-04-15 02:24:01,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:01,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:01,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:01,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:01,653 INFO L87 Difference]: Start difference. First operand 10047 states and 32595 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) [2021-04-15 02:24:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:01,866 INFO L93 Difference]: Finished difference Result 10532 states and 33761 transitions. [2021-04-15 02:24:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:24:01,867 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 21 [2021-04-15 02:24:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:01,883 INFO L225 Difference]: With dead ends: 10532 [2021-04-15 02:24:01,883 INFO L226 Difference]: Without dead ends: 10526 [2021-04-15 02:24:01,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:24:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-04-15 02:24:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10055. [2021-04-15 02:24:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10055 states, 10054 states have (on average 3.244778197732246) internal successors, (32623), 10054 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10055 states to 10055 states and 32623 transitions. [2021-04-15 02:24:02,034 INFO L78 Accepts]: Start accepts. Automaton has 10055 states and 32623 transitions. Word has length 21 [2021-04-15 02:24:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:02,034 INFO L480 AbstractCegarLoop]: Abstraction has 10055 states and 32623 transitions. [2021-04-15 02:24:02,035 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) [2021-04-15 02:24:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 10055 states and 32623 transitions. [2021-04-15 02:24:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:02,040 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:02,040 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:02,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:02,241 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:02,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:02,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1883745037, now seen corresponding path program 185 times [2021-04-15 02:24:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:02,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139325705] [2021-04-15 02:24:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:02,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139325705] [2021-04-15 02:24:02,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743744845] [2021-04-15 02:24:02,326 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 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 [2021-04-15 02:24:02,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:24:02,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:02,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:02,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:02,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:02,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924739929] [2021-04-15 02:24:02,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:02,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:02,390 INFO L87 Difference]: Start difference. First operand 10055 states and 32623 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) [2021-04-15 02:24:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:02,612 INFO L93 Difference]: Finished difference Result 10492 states and 33704 transitions. [2021-04-15 02:24:02,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:24:02,613 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 21 [2021-04-15 02:24:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:02,628 INFO L225 Difference]: With dead ends: 10492 [2021-04-15 02:24:02,628 INFO L226 Difference]: Without dead ends: 10485 [2021-04-15 02:24:02,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-04-15 02:24:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-04-15 02:24:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10067. [2021-04-15 02:24:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 3.2445857341545796) internal successors, (32660), 10066 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:02,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 32660 transitions. [2021-04-15 02:24:02,771 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 32660 transitions. Word has length 21 [2021-04-15 02:24:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:02,771 INFO L480 AbstractCegarLoop]: Abstraction has 10067 states and 32660 transitions. [2021-04-15 02:24:02,771 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) [2021-04-15 02:24:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 32660 transitions. [2021-04-15 02:24:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:02,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:02,777 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:02,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3383,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:02,978 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 482340035, now seen corresponding path program 186 times [2021-04-15 02:24:02,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:02,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633338461] [2021-04-15 02:24:02,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:03,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633338461] [2021-04-15 02:24:03,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29030350] [2021-04-15 02:24:03,036 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 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 [2021-04-15 02:24:03,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:24:03,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:24:03,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:03,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:24:03,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807055982] [2021-04-15 02:24:03,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:24:03,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:03,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:24:03,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:24:03,100 INFO L87 Difference]: Start difference. First operand 10067 states and 32660 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) [2021-04-15 02:24:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:03,189 INFO L93 Difference]: Finished difference Result 10308 states and 33030 transitions. [2021-04-15 02:24:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:24:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:24:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:03,205 INFO L225 Difference]: With dead ends: 10308 [2021-04-15 02:24:03,205 INFO L226 Difference]: Without dead ends: 10308 [2021-04-15 02:24:03,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-04-15 02:24:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 10076. [2021-04-15 02:24:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2450620347394543) internal successors, (32694), 10075 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32694 transitions. [2021-04-15 02:24:03,351 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32694 transitions. Word has length 21 [2021-04-15 02:24:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:03,351 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32694 transitions. [2021-04-15 02:24:03,351 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) [2021-04-15 02:24:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32694 transitions. [2021-04-15 02:24:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:03,357 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:03,357 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:03,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3384 [2021-04-15 02:24:03,558 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:03,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:03,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2072534951, now seen corresponding path program 187 times [2021-04-15 02:24:03,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:03,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42208827] [2021-04-15 02:24:03,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42208827] [2021-04-15 02:24:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334483287] [2021-04-15 02:24:03,611 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 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 [2021-04-15 02:24:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:24:03,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:03,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:24:03,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354321895] [2021-04-15 02:24:03,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:03,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:03,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:03,727 INFO L87 Difference]: Start difference. First operand 10076 states and 32694 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:24:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:03,828 INFO L93 Difference]: Finished difference Result 10304 states and 33012 transitions. [2021-04-15 02:24:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:24:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-04-15 02:24:03,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:03,842 INFO L225 Difference]: With dead ends: 10304 [2021-04-15 02:24:03,842 INFO L226 Difference]: Without dead ends: 10304 [2021-04-15 02:24:03,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:03,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-04-15 02:24:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10076. [2021-04-15 02:24:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2442679900744418) internal successors, (32686), 10075 states have internal predecessors, (32686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:03,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32686 transitions. [2021-04-15 02:24:03,970 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32686 transitions. Word has length 21 [2021-04-15 02:24:03,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:03,970 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32686 transitions. [2021-04-15 02:24:03,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:24:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32686 transitions. [2021-04-15 02:24:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:03,976 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:03,976 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:04,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3385,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:04,177 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:04,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:04,178 INFO L82 PathProgramCache]: Analyzing trace with hash -361921643, now seen corresponding path program 188 times [2021-04-15 02:24:04,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:04,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523739593] [2021-04-15 02:24:04,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:04,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523739593] [2021-04-15 02:24:04,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135901650] [2021-04-15 02:24:04,239 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 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 [2021-04-15 02:24:04,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:04,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:04,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:04,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-04-15 02:24:04,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21251641] [2021-04-15 02:24:04,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:04,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:04,294 INFO L87 Difference]: Start difference. First operand 10076 states and 32686 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:24:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:04,461 INFO L93 Difference]: Finished difference Result 10301 states and 33002 transitions. [2021-04-15 02:24:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:24:04,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-04-15 02:24:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:04,476 INFO L225 Difference]: With dead ends: 10301 [2021-04-15 02:24:04,476 INFO L226 Difference]: Without dead ends: 10299 [2021-04-15 02:24:04,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:24:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-04-15 02:24:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 10076. [2021-04-15 02:24:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2425806451612904) internal successors, (32669), 10075 states have internal predecessors, (32669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32669 transitions. [2021-04-15 02:24:04,625 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32669 transitions. Word has length 21 [2021-04-15 02:24:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:04,625 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32669 transitions. [2021-04-15 02:24:04,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:24:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32669 transitions. [2021-04-15 02:24:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:04,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:04,632 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:04,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-04-15 02:24:04,837 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:04,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:04,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1127483353, now seen corresponding path program 189 times [2021-04-15 02:24:04,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:04,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360213710] [2021-04-15 02:24:04,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:04,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360213710] [2021-04-15 02:24:04,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96689379] [2021-04-15 02:24:04,898 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 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 [2021-04-15 02:24:04,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:24:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:04,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:04,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:04,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:04,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:24:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763732225] [2021-04-15 02:24:04,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:04,962 INFO L87 Difference]: Start difference. First operand 10076 states and 32669 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) [2021-04-15 02:24:05,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:05,160 INFO L93 Difference]: Finished difference Result 10306 states and 32992 transitions. [2021-04-15 02:24:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:24:05,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:24:05,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:05,178 INFO L225 Difference]: With dead ends: 10306 [2021-04-15 02:24:05,178 INFO L226 Difference]: Without dead ends: 10303 [2021-04-15 02:24:05,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-04-15 02:24:05,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10076. [2021-04-15 02:24:05,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2422828784119107) internal successors, (32666), 10075 states have internal predecessors, (32666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:05,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32666 transitions. [2021-04-15 02:24:05,337 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32666 transitions. Word has length 21 [2021-04-15 02:24:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:05,337 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32666 transitions. [2021-04-15 02:24:05,337 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) [2021-04-15 02:24:05,337 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32666 transitions. [2021-04-15 02:24:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:05,343 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:05,343 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:05,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:05,544 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:05,544 INFO L82 PathProgramCache]: Analyzing trace with hash 54397973, now seen corresponding path program 190 times [2021-04-15 02:24:05,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:05,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626129948] [2021-04-15 02:24:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626129948] [2021-04-15 02:24:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689837677] [2021-04-15 02:24:05,610 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 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 [2021-04-15 02:24:05,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:05,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:24:05,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:05,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:24:05,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736798236] [2021-04-15 02:24:05,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:05,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:05,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:05,675 INFO L87 Difference]: Start difference. First operand 10076 states and 32666 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:05,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:05,839 INFO L93 Difference]: Finished difference Result 11212 states and 35976 transitions. [2021-04-15 02:24:05,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:05,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:24:05,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:05,856 INFO L225 Difference]: With dead ends: 11212 [2021-04-15 02:24:05,857 INFO L226 Difference]: Without dead ends: 11208 [2021-04-15 02:24:05,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:24:05,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-04-15 02:24:05,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 10076. [2021-04-15 02:24:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.241985111662531) internal successors, (32663), 10075 states have internal predecessors, (32663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32663 transitions. [2021-04-15 02:24:06,008 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32663 transitions. Word has length 21 [2021-04-15 02:24:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:06,008 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32663 transitions. [2021-04-15 02:24:06,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:06,008 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32663 transitions. [2021-04-15 02:24:06,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:06,014 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:06,014 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:06,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:06,214 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1148489561, now seen corresponding path program 191 times [2021-04-15 02:24:06,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:06,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739368938] [2021-04-15 02:24:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:06,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739368938] [2021-04-15 02:24:06,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937855026] [2021-04-15 02:24:06,287 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 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 [2021-04-15 02:24:06,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:24:06,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:06,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:06,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:06,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:06,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567843793] [2021-04-15 02:24:06,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:06,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:06,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:06,357 INFO L87 Difference]: Start difference. First operand 10076 states and 32663 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) [2021-04-15 02:24:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:06,559 INFO L93 Difference]: Finished difference Result 11223 states and 35989 transitions. [2021-04-15 02:24:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:06,559 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 21 [2021-04-15 02:24:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:06,578 INFO L225 Difference]: With dead ends: 11223 [2021-04-15 02:24:06,578 INFO L226 Difference]: Without dead ends: 11218 [2021-04-15 02:24:06,578 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-04-15 02:24:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10154. [2021-04-15 02:24:06,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.2445582586427655) internal successors, (32942), 10153 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32942 transitions. [2021-04-15 02:24:06,802 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32942 transitions. Word has length 21 [2021-04-15 02:24:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:06,802 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32942 transitions. [2021-04-15 02:24:06,802 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) [2021-04-15 02:24:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32942 transitions. [2021-04-15 02:24:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:06,809 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:06,809 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:07,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:07,010 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:07,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:07,010 INFO L82 PathProgramCache]: Analyzing trace with hash 705590421, now seen corresponding path program 192 times [2021-04-15 02:24:07,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:07,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743761454] [2021-04-15 02:24:07,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:07,083 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:07,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743761454] [2021-04-15 02:24:07,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431483761] [2021-04-15 02:24:07,084 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 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 [2021-04-15 02:24:07,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:24:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:07,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:07,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:07,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:07,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:07,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045145162] [2021-04-15 02:24:07,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:07,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:07,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:07,147 INFO L87 Difference]: Start difference. First operand 10154 states and 32942 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) [2021-04-15 02:24:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:07,343 INFO L93 Difference]: Finished difference Result 10405 states and 33574 transitions. [2021-04-15 02:24:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:07,343 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 21 [2021-04-15 02:24:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:07,359 INFO L225 Difference]: With dead ends: 10405 [2021-04-15 02:24:07,359 INFO L226 Difference]: Without dead ends: 10400 [2021-04-15 02:24:07,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:07,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-04-15 02:24:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10154. [2021-04-15 02:24:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244459765586526) internal successors, (32941), 10153 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32941 transitions. [2021-04-15 02:24:07,510 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32941 transitions. Word has length 21 [2021-04-15 02:24:07,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:07,510 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32941 transitions. [2021-04-15 02:24:07,510 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) [2021-04-15 02:24:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32941 transitions. [2021-04-15 02:24:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:07,516 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:07,516 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:07,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:07,716 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:07,717 INFO L82 PathProgramCache]: Analyzing trace with hash -139381031, now seen corresponding path program 193 times [2021-04-15 02:24:07,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:07,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717670303] [2021-04-15 02:24:07,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717670303] [2021-04-15 02:24:07,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844646228] [2021-04-15 02:24:07,794 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 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 [2021-04-15 02:24:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:07,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:07,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:07,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:07,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:07,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418405735] [2021-04-15 02:24:07,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:07,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:07,856 INFO L87 Difference]: Start difference. First operand 10154 states and 32941 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) [2021-04-15 02:24:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:08,019 INFO L93 Difference]: Finished difference Result 10382 states and 33519 transitions. [2021-04-15 02:24:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:24:08,020 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 21 [2021-04-15 02:24:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:08,034 INFO L225 Difference]: With dead ends: 10382 [2021-04-15 02:24:08,034 INFO L226 Difference]: Without dead ends: 10376 [2021-04-15 02:24:08,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2021-04-15 02:24:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10154. [2021-04-15 02:24:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244361272530287) internal successors, (32940), 10153 states have internal predecessors, (32940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32940 transitions. [2021-04-15 02:24:08,167 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32940 transitions. Word has length 21 [2021-04-15 02:24:08,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:08,167 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32940 transitions. [2021-04-15 02:24:08,167 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) [2021-04-15 02:24:08,167 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32940 transitions. [2021-04-15 02:24:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:08,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:08,172 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:08,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3391 [2021-04-15 02:24:08,373 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash -563692267, now seen corresponding path program 194 times [2021-04-15 02:24:08,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:08,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164186007] [2021-04-15 02:24:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:08,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164186007] [2021-04-15 02:24:08,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598475294] [2021-04-15 02:24:08,472 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:24:08,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:08,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:08,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:08,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:08,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079765568] [2021-04-15 02:24:08,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:08,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:08,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:08,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:08,549 INFO L87 Difference]: Start difference. First operand 10154 states and 32940 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) [2021-04-15 02:24:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:08,751 INFO L93 Difference]: Finished difference Result 10354 states and 33463 transitions. [2021-04-15 02:24:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:24:08,752 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 21 [2021-04-15 02:24:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:08,771 INFO L225 Difference]: With dead ends: 10354 [2021-04-15 02:24:08,771 INFO L226 Difference]: Without dead ends: 10347 [2021-04-15 02:24:08,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-04-15 02:24:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10154. [2021-04-15 02:24:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244262779474047) internal successors, (32939), 10153 states have internal predecessors, (32939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32939 transitions. [2021-04-15 02:24:08,927 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32939 transitions. Word has length 21 [2021-04-15 02:24:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:08,927 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32939 transitions. [2021-04-15 02:24:08,928 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) [2021-04-15 02:24:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32939 transitions. [2021-04-15 02:24:08,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:08,933 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:08,933 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:09,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-04-15 02:24:09,134 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:09,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:09,134 INFO L82 PathProgramCache]: Analyzing trace with hash -933266099, now seen corresponding path program 195 times [2021-04-15 02:24:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302208991] [2021-04-15 02:24:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:09,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302208991] [2021-04-15 02:24:09,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576271930] [2021-04-15 02:24:09,194 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 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 [2021-04-15 02:24:09,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:24:09,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:09,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:09,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:09,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:09,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:24:09,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259559301] [2021-04-15 02:24:09,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:09,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:09,335 INFO L87 Difference]: Start difference. First operand 10154 states and 32939 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:09,467 INFO L93 Difference]: Finished difference Result 10360 states and 33271 transitions. [2021-04-15 02:24:09,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:24:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:24:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:09,483 INFO L225 Difference]: With dead ends: 10360 [2021-04-15 02:24:09,483 INFO L226 Difference]: Without dead ends: 10360 [2021-04-15 02:24:09,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-04-15 02:24:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-04-15 02:24:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10157. [2021-04-15 02:24:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.2441906262307993) internal successors, (32948), 10156 states have internal predecessors, (32948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32948 transitions. [2021-04-15 02:24:09,619 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32948 transitions. Word has length 21 [2021-04-15 02:24:09,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:09,619 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32948 transitions. [2021-04-15 02:24:09,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32948 transitions. [2021-04-15 02:24:09,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:09,624 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:09,624 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:09,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-04-15 02:24:09,825 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:09,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1621452429, now seen corresponding path program 196 times [2021-04-15 02:24:09,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:09,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57208573] [2021-04-15 02:24:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57208573] [2021-04-15 02:24:09,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015366222] [2021-04-15 02:24:09,914 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:24:09,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:09,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:09,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 02:24:09,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245547757] [2021-04-15 02:24:09,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:09,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:09,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:09,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:09,984 INFO L87 Difference]: Start difference. First operand 10157 states and 32948 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:10,169 INFO L93 Difference]: Finished difference Result 10425 states and 33574 transitions. [2021-04-15 02:24:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:24:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:10,185 INFO L225 Difference]: With dead ends: 10425 [2021-04-15 02:24:10,185 INFO L226 Difference]: Without dead ends: 10419 [2021-04-15 02:24:10,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:10,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-04-15 02:24:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10157. [2021-04-15 02:24:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24399369830642) internal successors, (32946), 10156 states have internal predecessors, (32946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32946 transitions. [2021-04-15 02:24:10,373 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32946 transitions. Word has length 21 [2021-04-15 02:24:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:10,373 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32946 transitions. [2021-04-15 02:24:10,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32946 transitions. [2021-04-15 02:24:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:10,379 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:10,379 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:10,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-04-15 02:24:10,580 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash 984985575, now seen corresponding path program 197 times [2021-04-15 02:24:10,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:10,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662502902] [2021-04-15 02:24:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662502902] [2021-04-15 02:24:10,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416081882] [2021-04-15 02:24:10,655 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 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 [2021-04-15 02:24:10,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:24:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:10,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:10,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:10,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:10,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:10,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977565532] [2021-04-15 02:24:10,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:10,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:10,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:10,725 INFO L87 Difference]: Start difference. First operand 10157 states and 32946 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:10,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:10,926 INFO L93 Difference]: Finished difference Result 10525 states and 33745 transitions. [2021-04-15 02:24:10,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:24:10,926 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:24:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:10,944 INFO L225 Difference]: With dead ends: 10525 [2021-04-15 02:24:10,944 INFO L226 Difference]: Without dead ends: 10519 [2021-04-15 02:24:10,944 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-04-15 02:24:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10157. [2021-04-15 02:24:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24379677038204) internal successors, (32944), 10156 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32944 transitions. [2021-04-15 02:24:11,123 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32944 transitions. Word has length 21 [2021-04-15 02:24:11,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:11,123 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32944 transitions. [2021-04-15 02:24:11,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32944 transitions. [2021-04-15 02:24:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:11,129 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:11,129 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:11,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3395,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:11,329 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash 140014123, now seen corresponding path program 198 times [2021-04-15 02:24:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:11,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984428117] [2021-04-15 02:24:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:11,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984428117] [2021-04-15 02:24:11,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661638910] [2021-04-15 02:24:11,411 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 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 [2021-04-15 02:24:11,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:24:11,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:11,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:11,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:11,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221517126] [2021-04-15 02:24:11,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:11,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:11,480 INFO L87 Difference]: Start difference. First operand 10157 states and 32944 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) [2021-04-15 02:24:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:11,720 INFO L93 Difference]: Finished difference Result 10675 states and 34250 transitions. [2021-04-15 02:24:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 02:24:11,721 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 21 [2021-04-15 02:24:11,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:11,736 INFO L225 Difference]: With dead ends: 10675 [2021-04-15 02:24:11,736 INFO L226 Difference]: Without dead ends: 10668 [2021-04-15 02:24:11,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:24:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-04-15 02:24:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10194. [2021-04-15 02:24:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 10193 states have (on average 3.2428136956735014) internal successors, (33054), 10193 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 33054 transitions. [2021-04-15 02:24:11,888 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 33054 transitions. Word has length 21 [2021-04-15 02:24:11,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:11,889 INFO L480 AbstractCegarLoop]: Abstraction has 10194 states and 33054 transitions. [2021-04-15 02:24:11,889 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) [2021-04-15 02:24:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 33054 transitions. [2021-04-15 02:24:11,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:11,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:11,894 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:12,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-04-15 02:24:12,095 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:12,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1565617715, now seen corresponding path program 199 times [2021-04-15 02:24:12,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:12,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735571839] [2021-04-15 02:24:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:12,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735571839] [2021-04-15 02:24:12,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031934678] [2021-04-15 02:24:12,166 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 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 [2021-04-15 02:24:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:12,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:12,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:12,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:12,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:12,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560526868] [2021-04-15 02:24:12,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:12,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:12,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:12,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:12,230 INFO L87 Difference]: Start difference. First operand 10194 states and 33054 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) [2021-04-15 02:24:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:12,417 INFO L93 Difference]: Finished difference Result 10950 states and 35064 transitions. [2021-04-15 02:24:12,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:12,417 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 21 [2021-04-15 02:24:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:12,434 INFO L225 Difference]: With dead ends: 10950 [2021-04-15 02:24:12,434 INFO L226 Difference]: Without dead ends: 10944 [2021-04-15 02:24:12,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2021-04-15 02:24:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10207. [2021-04-15 02:24:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242994317068391) internal successors, (33098), 10206 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33098 transitions. [2021-04-15 02:24:12,587 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33098 transitions. Word has length 21 [2021-04-15 02:24:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:12,587 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33098 transitions. [2021-04-15 02:24:12,587 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) [2021-04-15 02:24:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33098 transitions. [2021-04-15 02:24:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:12,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:12,593 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:12,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-04-15 02:24:12,794 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1884378129, now seen corresponding path program 200 times [2021-04-15 02:24:12,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:12,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404843394] [2021-04-15 02:24:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:12,869 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:12,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404843394] [2021-04-15 02:24:12,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166787864] [2021-04-15 02:24:12,869 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 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 [2021-04-15 02:24:12,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:12,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:12,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:12,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:12,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284851250] [2021-04-15 02:24:12,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:12,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:12,932 INFO L87 Difference]: Start difference. First operand 10207 states and 33098 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) [2021-04-15 02:24:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:13,105 INFO L93 Difference]: Finished difference Result 10448 states and 33689 transitions. [2021-04-15 02:24:13,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:13,109 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 21 [2021-04-15 02:24:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:13,126 INFO L225 Difference]: With dead ends: 10448 [2021-04-15 02:24:13,126 INFO L226 Difference]: Without dead ends: 10442 [2021-04-15 02:24:13,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-04-15 02:24:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10207. [2021-04-15 02:24:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242896335488928) internal successors, (33097), 10206 states have internal predecessors, (33097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33097 transitions. [2021-04-15 02:24:13,280 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33097 transitions. Word has length 21 [2021-04-15 02:24:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:13,280 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33097 transitions. [2021-04-15 02:24:13,280 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) [2021-04-15 02:24:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33097 transitions. [2021-04-15 02:24:13,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:13,287 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:13,287 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:13,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3398,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:13,487 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1460066893, now seen corresponding path program 201 times [2021-04-15 02:24:13,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:13,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152478986] [2021-04-15 02:24:13,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:13,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152478986] [2021-04-15 02:24:13,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143095029] [2021-04-15 02:24:13,570 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 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 [2021-04-15 02:24:13,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 02:24:13,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:13,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:13,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:13,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:13,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136750711] [2021-04-15 02:24:13,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:13,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:13,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:13,635 INFO L87 Difference]: Start difference. First operand 10207 states and 33097 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:13,817 INFO L93 Difference]: Finished difference Result 10417 states and 33634 transitions. [2021-04-15 02:24:13,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:24:13,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:24:13,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:13,833 INFO L225 Difference]: With dead ends: 10417 [2021-04-15 02:24:13,833 INFO L226 Difference]: Without dead ends: 10410 [2021-04-15 02:24:13,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-04-15 02:24:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10207. [2021-04-15 02:24:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242798353909465) internal successors, (33096), 10206 states have internal predecessors, (33096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33096 transitions. [2021-04-15 02:24:13,977 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33096 transitions. Word has length 21 [2021-04-15 02:24:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:13,977 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33096 transitions. [2021-04-15 02:24:13,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33096 transitions. [2021-04-15 02:24:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:13,983 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:13,983 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:14,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:14,184 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 746808533, now seen corresponding path program 202 times [2021-04-15 02:24:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:14,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111673394] [2021-04-15 02:24:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:14,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111673394] [2021-04-15 02:24:14,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144863873] [2021-04-15 02:24:14,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:24:14,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:14,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:14,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:14,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:14,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-04-15 02:24:14,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29935181] [2021-04-15 02:24:14,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 02:24:14,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:14,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 02:24:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:24:14,300 INFO L87 Difference]: Start difference. First operand 10207 states and 33096 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) [2021-04-15 02:24:14,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:14,432 INFO L93 Difference]: Finished difference Result 10562 states and 33685 transitions. [2021-04-15 02:24:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:24:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:24:14,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:14,446 INFO L225 Difference]: With dead ends: 10562 [2021-04-15 02:24:14,446 INFO L226 Difference]: Without dead ends: 10562 [2021-04-15 02:24:14,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:14,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-04-15 02:24:14,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10217. [2021-04-15 02:24:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 3.2434416601409555) internal successors, (33135), 10216 states have internal predecessors, (33135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 33135 transitions. [2021-04-15 02:24:14,594 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 33135 transitions. Word has length 21 [2021-04-15 02:24:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:14,594 INFO L480 AbstractCegarLoop]: Abstraction has 10217 states and 33135 transitions. [2021-04-15 02:24:14,594 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) [2021-04-15 02:24:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 33135 transitions. [2021-04-15 02:24:14,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:14,600 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:14,600 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:14,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:14,801 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066453, now seen corresponding path program 203 times [2021-04-15 02:24:14,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:14,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738136599] [2021-04-15 02:24:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:14,865 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:14,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738136599] [2021-04-15 02:24:14,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296505428] [2021-04-15 02:24:14,866 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 02:24:14,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:24:14,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:14,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:24:14,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:14,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-04-15 02:24:14,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860421543] [2021-04-15 02:24:14,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:14,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:14,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:14,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:14,939 INFO L87 Difference]: Start difference. First operand 10217 states and 33135 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:24:15,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:15,041 INFO L93 Difference]: Finished difference Result 10501 states and 33539 transitions. [2021-04-15 02:24:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 02:24:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-04-15 02:24:15,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:15,057 INFO L225 Difference]: With dead ends: 10501 [2021-04-15 02:24:15,057 INFO L226 Difference]: Without dead ends: 10501 [2021-04-15 02:24:15,057 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-04-15 02:24:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10216. [2021-04-15 02:24:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.243171806167401) internal successors, (33129), 10215 states have internal predecessors, (33129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33129 transitions. [2021-04-15 02:24:15,209 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33129 transitions. Word has length 21 [2021-04-15 02:24:15,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:15,210 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33129 transitions. [2021-04-15 02:24:15,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-04-15 02:24:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33129 transitions. [2021-04-15 02:24:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:15,216 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:15,216 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:15,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:15,416 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:15,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:15,417 INFO L82 PathProgramCache]: Analyzing trace with hash -97453145, now seen corresponding path program 204 times [2021-04-15 02:24:15,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:15,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345565997] [2021-04-15 02:24:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345565997] [2021-04-15 02:24:15,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050027186] [2021-04-15 02:24:15,476 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 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 [2021-04-15 02:24:15,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:24:15,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:15,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:15,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:15,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:24:15,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468025297] [2021-04-15 02:24:15,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:15,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:15,533 INFO L87 Difference]: Start difference. First operand 10216 states and 33129 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) [2021-04-15 02:24:15,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:15,719 INFO L93 Difference]: Finished difference Result 10497 states and 33526 transitions. [2021-04-15 02:24:15,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:24:15,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:24:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:15,737 INFO L225 Difference]: With dead ends: 10497 [2021-04-15 02:24:15,737 INFO L226 Difference]: Without dead ends: 10495 [2021-04-15 02:24:15,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:24:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-04-15 02:24:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10216. [2021-04-15 02:24:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.242094958394518) internal successors, (33118), 10215 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33118 transitions. [2021-04-15 02:24:15,901 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33118 transitions. Word has length 21 [2021-04-15 02:24:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:15,901 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33118 transitions. [2021-04-15 02:24:15,902 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) [2021-04-15 02:24:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33118 transitions. [2021-04-15 02:24:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:15,908 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:15,908 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:16,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3402,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:16,108 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1391951851, now seen corresponding path program 205 times [2021-04-15 02:24:16,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:16,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488382015] [2021-04-15 02:24:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488382015] [2021-04-15 02:24:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770767217] [2021-04-15 02:24:16,170 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 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 [2021-04-15 02:24:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:16,230 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:16,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:16,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:24:16,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632537751] [2021-04-15 02:24:16,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:16,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:16,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:16,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:16,231 INFO L87 Difference]: Start difference. First operand 10216 states and 33118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:16,433 INFO L93 Difference]: Finished difference Result 10502 states and 33522 transitions. [2021-04-15 02:24:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:24:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:24:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:16,450 INFO L225 Difference]: With dead ends: 10502 [2021-04-15 02:24:16,450 INFO L226 Difference]: Without dead ends: 10499 [2021-04-15 02:24:16,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-04-15 02:24:16,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10216. [2021-04-15 02:24:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2418991678903573) internal successors, (33116), 10215 states have internal predecessors, (33116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33116 transitions. [2021-04-15 02:24:16,614 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33116 transitions. Word has length 21 [2021-04-15 02:24:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:16,614 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33116 transitions. [2021-04-15 02:24:16,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33116 transitions. [2021-04-15 02:24:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:16,621 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:16,621 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:16,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3403 [2021-04-15 02:24:16,821 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash 318866471, now seen corresponding path program 206 times [2021-04-15 02:24:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:16,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104998341] [2021-04-15 02:24:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104998341] [2021-04-15 02:24:16,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338581184] [2021-04-15 02:24:16,885 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 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 [2021-04-15 02:24:16,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:16,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:16,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:16,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:16,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:16,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:24:16,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706911115] [2021-04-15 02:24:16,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:16,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:16,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:16,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:16,948 INFO L87 Difference]: Start difference. First operand 10216 states and 33116 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:17,124 INFO L93 Difference]: Finished difference Result 11892 states and 38186 transitions. [2021-04-15 02:24:17,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:17,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21 [2021-04-15 02:24:17,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:17,143 INFO L225 Difference]: With dead ends: 11892 [2021-04-15 02:24:17,144 INFO L226 Difference]: Without dead ends: 11888 [2021-04-15 02:24:17,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:24:17,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2021-04-15 02:24:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 10216. [2021-04-15 02:24:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2417033773861967) internal successors, (33114), 10215 states have internal predecessors, (33114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:17,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33114 transitions. [2021-04-15 02:24:17,313 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33114 transitions. Word has length 21 [2021-04-15 02:24:17,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:17,313 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33114 transitions. [2021-04-15 02:24:17,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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) [2021-04-15 02:24:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33114 transitions. [2021-04-15 02:24:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:17,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:17,319 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:17,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3404,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:17,520 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:17,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1412958059, now seen corresponding path program 207 times [2021-04-15 02:24:17,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:17,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11100209] [2021-04-15 02:24:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:17,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11100209] [2021-04-15 02:24:17,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166106921] [2021-04-15 02:24:17,590 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 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 [2021-04-15 02:24:17,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:24:17,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:17,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:17,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:17,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:17,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:24:17,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666151150] [2021-04-15 02:24:17,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:17,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:17,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:17,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:17,654 INFO L87 Difference]: Start difference. First operand 10216 states and 33114 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) [2021-04-15 02:24:17,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:17,824 INFO L93 Difference]: Finished difference Result 11434 states and 36626 transitions. [2021-04-15 02:24:17,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 02:24:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:17,841 INFO L225 Difference]: With dead ends: 11434 [2021-04-15 02:24:17,841 INFO L226 Difference]: Without dead ends: 11429 [2021-04-15 02:24:17,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:24:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2021-04-15 02:24:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 10216. [2021-04-15 02:24:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.241507586882036) internal successors, (33112), 10215 states have internal predecessors, (33112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:17,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33112 transitions. [2021-04-15 02:24:17,990 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33112 transitions. Word has length 21 [2021-04-15 02:24:17,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:17,990 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33112 transitions. [2021-04-15 02:24:17,990 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) [2021-04-15 02:24:17,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33112 transitions. [2021-04-15 02:24:17,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:17,996 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:17,996 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:18,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3405 [2021-04-15 02:24:18,198 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash 970058919, now seen corresponding path program 208 times [2021-04-15 02:24:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:18,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812183727] [2021-04-15 02:24:18,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:18,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812183727] [2021-04-15 02:24:18,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499331718] [2021-04-15 02:24:18,328 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 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 [2021-04-15 02:24:18,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:18,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:18,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:18,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:18,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740192488] [2021-04-15 02:24:18,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:18,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:18,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:18,389 INFO L87 Difference]: Start difference. First operand 10216 states and 33112 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) [2021-04-15 02:24:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:18,579 INFO L93 Difference]: Finished difference Result 11458 states and 36660 transitions. [2021-04-15 02:24:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:18,580 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 21 [2021-04-15 02:24:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:18,596 INFO L225 Difference]: With dead ends: 11458 [2021-04-15 02:24:18,596 INFO L226 Difference]: Without dead ends: 11452 [2021-04-15 02:24:18,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-04-15 02:24:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10313. [2021-04-15 02:24:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2438906128782) internal successors, (33451), 10312 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33451 transitions. [2021-04-15 02:24:18,741 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33451 transitions. Word has length 21 [2021-04-15 02:24:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:18,741 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33451 transitions. [2021-04-15 02:24:18,741 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) [2021-04-15 02:24:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33451 transitions. [2021-04-15 02:24:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:18,746 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:18,746 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:18,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-04-15 02:24:18,947 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:18,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:18,947 INFO L82 PathProgramCache]: Analyzing trace with hash 125087467, now seen corresponding path program 209 times [2021-04-15 02:24:18,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:18,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387128157] [2021-04-15 02:24:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387128157] [2021-04-15 02:24:19,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4872633] [2021-04-15 02:24:19,025 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 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 [2021-04-15 02:24:19,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:24:19,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:19,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:19,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:19,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:19,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:19,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463659043] [2021-04-15 02:24:19,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:19,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:19,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:19,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:19,087 INFO L87 Difference]: Start difference. First operand 10313 states and 33451 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) [2021-04-15 02:24:19,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:19,262 INFO L93 Difference]: Finished difference Result 10600 states and 34163 transitions. [2021-04-15 02:24:19,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:19,263 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 21 [2021-04-15 02:24:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:19,277 INFO L225 Difference]: With dead ends: 10600 [2021-04-15 02:24:19,278 INFO L226 Difference]: Without dead ends: 10594 [2021-04-15 02:24:19,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2021-04-15 02:24:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10313. [2021-04-15 02:24:19,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2437936384794415) internal successors, (33450), 10312 states have internal predecessors, (33450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33450 transitions. [2021-04-15 02:24:19,418 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33450 transitions. Word has length 21 [2021-04-15 02:24:19,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:19,418 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33450 transitions. [2021-04-15 02:24:19,418 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) [2021-04-15 02:24:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33450 transitions. [2021-04-15 02:24:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:19,424 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:19,424 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:19,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3407,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:19,625 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -299223769, now seen corresponding path program 210 times [2021-04-15 02:24:19,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:19,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587998790] [2021-04-15 02:24:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:19,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587998790] [2021-04-15 02:24:19,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231943394] [2021-04-15 02:24:19,706 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 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 [2021-04-15 02:24:19,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:24:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:19,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:19,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:19,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76813780] [2021-04-15 02:24:19,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:19,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:19,770 INFO L87 Difference]: Start difference. First operand 10313 states and 33450 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:19,930 INFO L93 Difference]: Finished difference Result 10577 states and 34108 transitions. [2021-04-15 02:24:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:24:19,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:24:19,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:19,947 INFO L225 Difference]: With dead ends: 10577 [2021-04-15 02:24:19,948 INFO L226 Difference]: Without dead ends: 10570 [2021-04-15 02:24:19,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-04-15 02:24:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10313. [2021-04-15 02:24:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243696664080683) internal successors, (33449), 10312 states have internal predecessors, (33449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33449 transitions. [2021-04-15 02:24:20,103 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33449 transitions. Word has length 21 [2021-04-15 02:24:20,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:20,103 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33449 transitions. [2021-04-15 02:24:20,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:20,104 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33449 transitions. [2021-04-15 02:24:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:20,110 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:20,110 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:20,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-04-15 02:24:20,311 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash -567970197, now seen corresponding path program 211 times [2021-04-15 02:24:20,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:20,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878927568] [2021-04-15 02:24:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878927568] [2021-04-15 02:24:20,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931376600] [2021-04-15 02:24:20,398 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 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 [2021-04-15 02:24:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:20,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:20,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:20,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:20,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:20,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973021254] [2021-04-15 02:24:20,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:20,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:20,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:20,462 INFO L87 Difference]: Start difference. First operand 10313 states and 33449 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) [2021-04-15 02:24:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:20,623 INFO L93 Difference]: Finished difference Result 10543 states and 34047 transitions. [2021-04-15 02:24:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 02:24:20,624 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 21 [2021-04-15 02:24:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:20,639 INFO L225 Difference]: With dead ends: 10543 [2021-04-15 02:24:20,639 INFO L226 Difference]: Without dead ends: 10535 [2021-04-15 02:24:20,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 162.0ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-04-15 02:24:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10313. [2021-04-15 02:24:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243599689681924) internal successors, (33448), 10312 states have internal predecessors, (33448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33448 transitions. [2021-04-15 02:24:20,782 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33448 transitions. Word has length 21 [2021-04-15 02:24:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:20,782 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33448 transitions. [2021-04-15 02:24:20,782 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) [2021-04-15 02:24:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33448 transitions. [2021-04-15 02:24:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:20,789 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:20,789 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:20,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:20,989 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:20,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1673725717, now seen corresponding path program 212 times [2021-04-15 02:24:20,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:20,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119949323] [2021-04-15 02:24:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119949323] [2021-04-15 02:24:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887568917] [2021-04-15 02:24:21,063 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 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 [2021-04-15 02:24:21,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:21,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:21,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:21,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:21,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-04-15 02:24:21,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267097111] [2021-04-15 02:24:21,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:21,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:21,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:21,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:21,126 INFO L87 Difference]: Start difference. First operand 10313 states and 33448 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) [2021-04-15 02:24:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:21,277 INFO L93 Difference]: Finished difference Result 10708 states and 34397 transitions. [2021-04-15 02:24:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 02:24:21,278 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 [2021-04-15 02:24:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:21,296 INFO L225 Difference]: With dead ends: 10708 [2021-04-15 02:24:21,296 INFO L226 Difference]: Without dead ends: 10708 [2021-04-15 02:24:21,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-04-15 02:24:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-04-15 02:24:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10467. [2021-04-15 02:24:21,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2501433212306514) internal successors, (34016), 10466 states have internal predecessors, (34016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34016 transitions. [2021-04-15 02:24:21,451 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34016 transitions. Word has length 21 [2021-04-15 02:24:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:21,452 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 34016 transitions. [2021-04-15 02:24:21,452 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) [2021-04-15 02:24:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34016 transitions. [2021-04-15 02:24:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:21,458 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:21,458 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:21,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3410,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:21,659 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1547961357, now seen corresponding path program 213 times [2021-04-15 02:24:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:21,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334641178] [2021-04-15 02:24:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:21,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334641178] [2021-04-15 02:24:21,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31687298] [2021-04-15 02:24:21,728 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 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 [2021-04-15 02:24:21,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 02:24:21,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:21,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:21,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:21,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805208795] [2021-04-15 02:24:21,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:21,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:21,794 INFO L87 Difference]: Start difference. First operand 10467 states and 34016 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:21,986 INFO L93 Difference]: Finished difference Result 10785 states and 34763 transitions. [2021-04-15 02:24:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:24:21,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:24:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:22,002 INFO L225 Difference]: With dead ends: 10785 [2021-04-15 02:24:22,002 INFO L226 Difference]: Without dead ends: 10778 [2021-04-15 02:24:22,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-04-15 02:24:22,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 10467. [2021-04-15 02:24:22,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2500477737435505) internal successors, (34015), 10466 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:22,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34015 transitions. [2021-04-15 02:24:22,172 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34015 transitions. Word has length 21 [2021-04-15 02:24:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:22,172 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 34015 transitions. [2021-04-15 02:24:22,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34015 transitions. [2021-04-15 02:24:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:22,178 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:22,178 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:22,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:22,378 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:22,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:22,379 INFO L82 PathProgramCache]: Analyzing trace with hash 196402649, now seen corresponding path program 214 times [2021-04-15 02:24:22,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:22,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249330946] [2021-04-15 02:24:22,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:22,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249330946] [2021-04-15 02:24:22,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30784190] [2021-04-15 02:24:22,447 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 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 [2021-04-15 02:24:22,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:22,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:22,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:22,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:22,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:22,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:22,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593113870] [2021-04-15 02:24:22,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:22,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:22,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:22,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:22,510 INFO L87 Difference]: Start difference. First operand 10467 states and 34015 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:22,703 INFO L93 Difference]: Finished difference Result 11060 states and 35467 transitions. [2021-04-15 02:24:22,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:24:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:22,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:22,720 INFO L225 Difference]: With dead ends: 11060 [2021-04-15 02:24:22,720 INFO L226 Difference]: Without dead ends: 11053 [2021-04-15 02:24:22,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2021-04-15 02:24:22,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 10479. [2021-04-15 02:24:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2499522809696506) internal successors, (34053), 10478 states have internal predecessors, (34053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34053 transitions. [2021-04-15 02:24:22,887 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34053 transitions. Word has length 21 [2021-04-15 02:24:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:22,887 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 34053 transitions. [2021-04-15 02:24:22,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34053 transitions. [2021-04-15 02:24:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:22,894 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:22,895 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:23,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:23,095 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash -227908587, now seen corresponding path program 215 times [2021-04-15 02:24:23,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:23,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674084401] [2021-04-15 02:24:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:23,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674084401] [2021-04-15 02:24:23,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838300123] [2021-04-15 02:24:23,169 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 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 [2021-04-15 02:24:23,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:24:23,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:23,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:23,233 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:23,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:23,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:23,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800902303] [2021-04-15 02:24:23,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:23,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:23,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:23,234 INFO L87 Difference]: Start difference. First operand 10479 states and 34053 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:23,415 INFO L93 Difference]: Finished difference Result 10685 states and 34579 transitions. [2021-04-15 02:24:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:23,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:23,433 INFO L225 Difference]: With dead ends: 10685 [2021-04-15 02:24:23,433 INFO L226 Difference]: Without dead ends: 10678 [2021-04-15 02:24:23,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:23,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2021-04-15 02:24:23,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10479. [2021-04-15 02:24:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2498568429089523) internal successors, (34052), 10478 states have internal predecessors, (34052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34052 transitions. [2021-04-15 02:24:23,586 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34052 transitions. Word has length 21 [2021-04-15 02:24:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:23,586 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 34052 transitions. [2021-04-15 02:24:23,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34052 transitions. [2021-04-15 02:24:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:23,593 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:23,593 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:23,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3413 [2021-04-15 02:24:23,793 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1562888013, now seen corresponding path program 216 times [2021-04-15 02:24:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:23,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753337250] [2021-04-15 02:24:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:23,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753337250] [2021-04-15 02:24:23,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300993256] [2021-04-15 02:24:23,862 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 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 [2021-04-15 02:24:23,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:24:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:23,928 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:23,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:23,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:23,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548446229] [2021-04-15 02:24:23,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:23,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:23,929 INFO L87 Difference]: Start difference. First operand 10479 states and 34052 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:24,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:24,123 INFO L93 Difference]: Finished difference Result 11317 states and 36210 transitions. [2021-04-15 02:24:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:24:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:24,141 INFO L225 Difference]: With dead ends: 11317 [2021-04-15 02:24:24,141 INFO L226 Difference]: Without dead ends: 11310 [2021-04-15 02:24:24,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-04-15 02:24:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 10494. [2021-04-15 02:24:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2499761745925855) internal successors, (34102), 10493 states have internal predecessors, (34102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34102 transitions. [2021-04-15 02:24:24,303 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34102 transitions. Word has length 21 [2021-04-15 02:24:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:24,303 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34102 transitions. [2021-04-15 02:24:24,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:24,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34102 transitions. [2021-04-15 02:24:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:24,309 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:24,309 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:24,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:24,510 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1987199249, now seen corresponding path program 217 times [2021-04-15 02:24:24,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:24,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997872923] [2021-04-15 02:24:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:24,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997872923] [2021-04-15 02:24:24,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886209991] [2021-04-15 02:24:24,585 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 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 [2021-04-15 02:24:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:24,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:24,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:24,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:24,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700563144] [2021-04-15 02:24:24,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:24,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:24,649 INFO L87 Difference]: Start difference. First operand 10494 states and 34102 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:24,838 INFO L93 Difference]: Finished difference Result 10745 states and 34721 transitions. [2021-04-15 02:24:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:24,855 INFO L225 Difference]: With dead ends: 10745 [2021-04-15 02:24:24,855 INFO L226 Difference]: Without dead ends: 10738 [2021-04-15 02:24:24,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-04-15 02:24:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10494. [2021-04-15 02:24:24,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.249880872962928) internal successors, (34101), 10493 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34101 transitions. [2021-04-15 02:24:25,011 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34101 transitions. Word has length 21 [2021-04-15 02:24:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:25,011 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34101 transitions. [2021-04-15 02:24:25,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34101 transitions. [2021-04-15 02:24:25,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:25,018 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:25,018 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:25,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3415 [2021-04-15 02:24:25,218 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash 2039021619, now seen corresponding path program 218 times [2021-04-15 02:24:25,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:25,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858887692] [2021-04-15 02:24:25,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858887692] [2021-04-15 02:24:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289274816] [2021-04-15 02:24:25,298 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 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 [2021-04-15 02:24:25,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:25,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:25,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:25,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084498574] [2021-04-15 02:24:25,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:25,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:25,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:25,362 INFO L87 Difference]: Start difference. First operand 10494 states and 34101 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:25,540 INFO L93 Difference]: Finished difference Result 10713 states and 34665 transitions. [2021-04-15 02:24:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:25,540 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:25,559 INFO L225 Difference]: With dead ends: 10713 [2021-04-15 02:24:25,559 INFO L226 Difference]: Without dead ends: 10705 [2021-04-15 02:24:25,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-04-15 02:24:25,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10494. [2021-04-15 02:24:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2497855713332697) internal successors, (34100), 10493 states have internal predecessors, (34100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34100 transitions. [2021-04-15 02:24:25,728 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34100 transitions. Word has length 21 [2021-04-15 02:24:25,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:25,728 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34100 transitions. [2021-04-15 02:24:25,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:25,728 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34100 transitions. [2021-04-15 02:24:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:25,736 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:25,736 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:25,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3416,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:25,936 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:25,936 INFO L82 PathProgramCache]: Analyzing trace with hash 355397379, now seen corresponding path program 219 times [2021-04-15 02:24:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:25,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262058396] [2021-04-15 02:24:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:25,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:25,993 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:25,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262058396] [2021-04-15 02:24:25,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761843116] [2021-04-15 02:24:25,993 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 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 [2021-04-15 02:24:26,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:24:26,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:26,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:26,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:26,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:24:26,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259936732] [2021-04-15 02:24:26,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:26,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:26,123 INFO L87 Difference]: Start difference. First operand 10494 states and 34100 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) [2021-04-15 02:24:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:26,237 INFO L93 Difference]: Finished difference Result 12763 states and 41190 transitions. [2021-04-15 02:24:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:24:26,238 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 [2021-04-15 02:24:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:26,260 INFO L225 Difference]: With dead ends: 12763 [2021-04-15 02:24:26,260 INFO L226 Difference]: Without dead ends: 12763 [2021-04-15 02:24:26,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-04-15 02:24:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12391. [2021-04-15 02:24:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12391 states, 12390 states have (on average 3.2764326069410816) internal successors, (40595), 12390 states have internal predecessors, (40595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12391 states to 12391 states and 40595 transitions. [2021-04-15 02:24:26,466 INFO L78 Accepts]: Start accepts. Automaton has 12391 states and 40595 transitions. Word has length 21 [2021-04-15 02:24:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:26,466 INFO L480 AbstractCegarLoop]: Abstraction has 12391 states and 40595 transitions. [2021-04-15 02:24:26,466 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) [2021-04-15 02:24:26,466 INFO L276 IsEmpty]: Start isEmpty. Operand 12391 states and 40595 transitions. [2021-04-15 02:24:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:26,474 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:26,475 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:26,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:26,676 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2095489689, now seen corresponding path program 220 times [2021-04-15 02:24:26,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:26,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172125323] [2021-04-15 02:24:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:26,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172125323] [2021-04-15 02:24:26,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157253631] [2021-04-15 02:24:26,735 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 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 [2021-04-15 02:24:26,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:26,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:26,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:26,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:26,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-04-15 02:24:26,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789918965] [2021-04-15 02:24:26,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:26,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:26,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:26,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:26,799 INFO L87 Difference]: Start difference. First operand 12391 states and 40595 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-04-15 02:24:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:26,924 INFO L93 Difference]: Finished difference Result 12700 states and 41042 transitions. [2021-04-15 02:24:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:24:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21 [2021-04-15 02:24:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:26,950 INFO L225 Difference]: With dead ends: 12700 [2021-04-15 02:24:26,950 INFO L226 Difference]: Without dead ends: 12700 [2021-04-15 02:24:26,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2021-04-15 02:24:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12390. [2021-04-15 02:24:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.276293486157075) internal successors, (40590), 12389 states have internal predecessors, (40590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40590 transitions. [2021-04-15 02:24:27,161 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40590 transitions. Word has length 21 [2021-04-15 02:24:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:27,161 INFO L480 AbstractCegarLoop]: Abstraction has 12390 states and 40590 transitions. [2021-04-15 02:24:27,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-04-15 02:24:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40590 transitions. [2021-04-15 02:24:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:27,169 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:27,169 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:27,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3418 [2021-04-15 02:24:27,370 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:27,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:27,370 INFO L82 PathProgramCache]: Analyzing trace with hash -488864299, now seen corresponding path program 221 times [2021-04-15 02:24:27,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:27,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947888703] [2021-04-15 02:24:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947888703] [2021-04-15 02:24:27,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317359352] [2021-04-15 02:24:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 02:24:27,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 02:24:27,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:27,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:27,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:27,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:27,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-04-15 02:24:27,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392058243] [2021-04-15 02:24:27,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 02:24:27,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:27,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 02:24:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:24:27,487 INFO L87 Difference]: Start difference. First operand 12390 states and 40590 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) [2021-04-15 02:24:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:27,659 INFO L93 Difference]: Finished difference Result 12712 states and 41072 transitions. [2021-04-15 02:24:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:24:27,660 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 [2021-04-15 02:24:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:27,678 INFO L225 Difference]: With dead ends: 12712 [2021-04-15 02:24:27,678 INFO L226 Difference]: Without dead ends: 12710 [2021-04-15 02:24:27,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-04-15 02:24:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-04-15 02:24:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 12390. [2021-04-15 02:24:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.2761320526273305) internal successors, (40588), 12389 states have internal predecessors, (40588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40588 transitions. [2021-04-15 02:24:27,866 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40588 transitions. Word has length 21 [2021-04-15 02:24:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:27,867 INFO L480 AbstractCegarLoop]: Abstraction has 12390 states and 40588 transitions. [2021-04-15 02:24:27,867 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) [2021-04-15 02:24:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40588 transitions. [2021-04-15 02:24:27,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:27,874 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:27,874 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:28,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:28,075 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1000540697, now seen corresponding path program 222 times [2021-04-15 02:24:28,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:28,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164511938] [2021-04-15 02:24:28,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:28,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164511938] [2021-04-15 02:24:28,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776867892] [2021-04-15 02:24:28,130 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 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 [2021-04-15 02:24:28,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 02:24:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:28,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:28,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:24:28,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315582591] [2021-04-15 02:24:28,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:28,192 INFO L87 Difference]: Start difference. First operand 12390 states and 40588 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-04-15 02:24:28,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:28,388 INFO L93 Difference]: Finished difference Result 12717 states and 41077 transitions. [2021-04-15 02:24:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 02:24:28,389 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 21 [2021-04-15 02:24:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:28,411 INFO L225 Difference]: With dead ends: 12717 [2021-04-15 02:24:28,411 INFO L226 Difference]: Without dead ends: 12714 [2021-04-15 02:24:28,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12714 states. [2021-04-15 02:24:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12714 to 12399. [2021-04-15 02:24:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2764962090659786) internal successors, (40622), 12398 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40622 transitions. [2021-04-15 02:24:28,611 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40622 transitions. Word has length 21 [2021-04-15 02:24:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:28,612 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40622 transitions. [2021-04-15 02:24:28,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-04-15 02:24:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40622 transitions. [2021-04-15 02:24:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:28,619 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:28,619 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:28,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3420,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:28,819 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:28,820 INFO L82 PathProgramCache]: Analyzing trace with hash -72544683, now seen corresponding path program 223 times [2021-04-15 02:24:28,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:28,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114696009] [2021-04-15 02:24:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:28,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114696009] [2021-04-15 02:24:28,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658857798] [2021-04-15 02:24:28,877 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 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 [2021-04-15 02:24:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:28,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:28,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:28,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:28,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:24:28,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668950289] [2021-04-15 02:24:28,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:28,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:28,939 INFO L87 Difference]: Start difference. First operand 12399 states and 40622 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-04-15 02:24:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:29,136 INFO L93 Difference]: Finished difference Result 14561 states and 47167 transitions. [2021-04-15 02:24:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 02:24:29,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 21 [2021-04-15 02:24:29,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:29,158 INFO L225 Difference]: With dead ends: 14561 [2021-04-15 02:24:29,159 INFO L226 Difference]: Without dead ends: 14557 [2021-04-15 02:24:29,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-04-15 02:24:29,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 12399. [2021-04-15 02:24:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276415550895306) internal successors, (40621), 12398 states have internal predecessors, (40621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40621 transitions. [2021-04-15 02:24:29,365 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40621 transitions. Word has length 21 [2021-04-15 02:24:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:29,365 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40621 transitions. [2021-04-15 02:24:29,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-04-15 02:24:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40621 transitions. [2021-04-15 02:24:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:29,441 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:29,441 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:29,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3421,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:29,641 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:29,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:29,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1021546905, now seen corresponding path program 224 times [2021-04-15 02:24:29,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:29,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917870386] [2021-04-15 02:24:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917870386] [2021-04-15 02:24:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891793110] [2021-04-15 02:24:29,701 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 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 [2021-04-15 02:24:29,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:29,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:29,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:29,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-04-15 02:24:29,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754973938] [2021-04-15 02:24:29,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:29,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:29,762 INFO L87 Difference]: Start difference. First operand 12399 states and 40621 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-04-15 02:24:29,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:29,960 INFO L93 Difference]: Finished difference Result 14191 states and 45981 transitions. [2021-04-15 02:24:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:24:29,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 21 [2021-04-15 02:24:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:29,979 INFO L225 Difference]: With dead ends: 14191 [2021-04-15 02:24:29,979 INFO L226 Difference]: Without dead ends: 14186 [2021-04-15 02:24:29,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:29,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-04-15 02:24:30,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 12399. [2021-04-15 02:24:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276334892724633) internal successors, (40620), 12398 states have internal predecessors, (40620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40620 transitions. [2021-04-15 02:24:30,158 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40620 transitions. Word has length 21 [2021-04-15 02:24:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:30,159 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40620 transitions. [2021-04-15 02:24:30,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-04-15 02:24:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40620 transitions. [2021-04-15 02:24:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:30,166 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:30,166 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:30,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3422,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:30,366 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:30,367 INFO L82 PathProgramCache]: Analyzing trace with hash 578647765, now seen corresponding path program 225 times [2021-04-15 02:24:30,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:30,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746179889] [2021-04-15 02:24:30,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:30,428 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:30,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746179889] [2021-04-15 02:24:30,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101171538] [2021-04-15 02:24:30,428 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 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 [2021-04-15 02:24:30,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 02:24:30,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:30,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:30,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:30,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:30,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-04-15 02:24:30,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405029433] [2021-04-15 02:24:30,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 02:24:30,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:30,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 02:24:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:24:30,490 INFO L87 Difference]: Start difference. First operand 12399 states and 40620 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) [2021-04-15 02:24:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:30,668 INFO L93 Difference]: Finished difference Result 13610 states and 44018 transitions. [2021-04-15 02:24:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:30,669 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 [2021-04-15 02:24:30,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:30,690 INFO L225 Difference]: With dead ends: 13610 [2021-04-15 02:24:30,690 INFO L226 Difference]: Without dead ends: 13604 [2021-04-15 02:24:30,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-04-15 02:24:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-04-15 02:24:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 12399. [2021-04-15 02:24:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2762542345539605) internal successors, (40619), 12398 states have internal predecessors, (40619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40619 transitions. [2021-04-15 02:24:30,884 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40619 transitions. Word has length 21 [2021-04-15 02:24:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:30,884 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40619 transitions. [2021-04-15 02:24:30,884 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) [2021-04-15 02:24:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40619 transitions. [2021-04-15 02:24:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:30,891 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:30,891 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:31,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3423,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:31,092 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:31,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash -266323687, now seen corresponding path program 226 times [2021-04-15 02:24:31,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:31,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134218401] [2021-04-15 02:24:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134218401] [2021-04-15 02:24:31,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845113627] [2021-04-15 02:24:31,163 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 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 [2021-04-15 02:24:31,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:31,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:31,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:31,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:31,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:31,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920650238] [2021-04-15 02:24:31,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:31,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:31,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:31,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:31,224 INFO L87 Difference]: Start difference. First operand 12399 states and 40619 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:31,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:31,424 INFO L93 Difference]: Finished difference Result 13653 states and 44081 transitions. [2021-04-15 02:24:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 02:24:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:31,446 INFO L225 Difference]: With dead ends: 13653 [2021-04-15 02:24:31,446 INFO L226 Difference]: Without dead ends: 13646 [2021-04-15 02:24:31,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13646 states. [2021-04-15 02:24:31,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13646 to 12454. [2021-04-15 02:24:31,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2765598650927488) internal successors, (40803), 12453 states have internal predecessors, (40803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40803 transitions. [2021-04-15 02:24:31,642 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40803 transitions. Word has length 21 [2021-04-15 02:24:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:31,642 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40803 transitions. [2021-04-15 02:24:31,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40803 transitions. [2021-04-15 02:24:31,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:31,650 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:31,650 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:31,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3424,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:31,850 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -690634923, now seen corresponding path program 227 times [2021-04-15 02:24:31,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:31,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738065411] [2021-04-15 02:24:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738065411] [2021-04-15 02:24:31,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598152551] [2021-04-15 02:24:31,925 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 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 [2021-04-15 02:24:31,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 02:24:31,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:31,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:31,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:31,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:31,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559933271] [2021-04-15 02:24:31,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:31,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:31,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:31,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:31,989 INFO L87 Difference]: Start difference. First operand 12454 states and 40803 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:32,171 INFO L93 Difference]: Finished difference Result 12749 states and 41539 transitions. [2021-04-15 02:24:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 02:24:32,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:32,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:32,190 INFO L225 Difference]: With dead ends: 12749 [2021-04-15 02:24:32,190 INFO L226 Difference]: Without dead ends: 12742 [2021-04-15 02:24:32,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2021-04-15 02:24:32,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 12454. [2021-04-15 02:24:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.276479563157472) internal successors, (40802), 12453 states have internal predecessors, (40802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40802 transitions. [2021-04-15 02:24:32,366 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40802 transitions. Word has length 21 [2021-04-15 02:24:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:32,366 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40802 transitions. [2021-04-15 02:24:32,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40802 transitions. [2021-04-15 02:24:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:32,374 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:32,374 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:32,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-04-15 02:24:32,574 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:32,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:32,575 INFO L82 PathProgramCache]: Analyzing trace with hash -959381351, now seen corresponding path program 228 times [2021-04-15 02:24:32,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:32,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461581757] [2021-04-15 02:24:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461581757] [2021-04-15 02:24:32,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041895518] [2021-04-15 02:24:32,655 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 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 [2021-04-15 02:24:32,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 02:24:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 02:24:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:32,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:32,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-04-15 02:24:32,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945125721] [2021-04-15 02:24:32,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:32,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:32,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:32,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:32,722 INFO L87 Difference]: Start difference. First operand 12454 states and 40802 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:32,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:32,908 INFO L93 Difference]: Finished difference Result 12726 states and 41484 transitions. [2021-04-15 02:24:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 02:24:32,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-04-15 02:24:32,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:32,933 INFO L225 Difference]: With dead ends: 12726 [2021-04-15 02:24:32,933 INFO L226 Difference]: Without dead ends: 12718 [2021-04-15 02:24:32,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-04-15 02:24:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 12454. [2021-04-15 02:24:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763992612221955) internal successors, (40801), 12453 states have internal predecessors, (40801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40801 transitions. [2021-04-15 02:24:33,182 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40801 transitions. Word has length 21 [2021-04-15 02:24:33,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:33,182 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40801 transitions. [2021-04-15 02:24:33,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40801 transitions. [2021-04-15 02:24:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 02:24:33,190 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:33,190 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:33,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:33,391 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:33,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:33,391 INFO L82 PathProgramCache]: Analyzing trace with hash -700586027, now seen corresponding path program 229 times [2021-04-15 02:24:33,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:33,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068529525] [2021-04-15 02:24:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068529525] [2021-04-15 02:24:33,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370950850] [2021-04-15 02:24:33,480 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 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 [2021-04-15 02:24:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:33,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 02:24:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:24:33,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:33,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-04-15 02:24:33,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520012977] [2021-04-15 02:24:33,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 02:24:33,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 02:24:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:24:33,559 INFO L87 Difference]: Start difference. First operand 12454 states and 40801 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:33,742 INFO L93 Difference]: Finished difference Result 12691 states and 41422 transitions. [2021-04-15 02:24:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 02:24:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 21 [2021-04-15 02:24:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:33,760 INFO L225 Difference]: With dead ends: 12691 [2021-04-15 02:24:33,761 INFO L226 Difference]: Without dead ends: 12682 [2021-04-15 02:24:33,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-04-15 02:24:33,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2021-04-15 02:24:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12454. [2021-04-15 02:24:33,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763189592869186) internal successors, (40800), 12453 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:33,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40800 transitions. [2021-04-15 02:24:33,933 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40800 transitions. Word has length 21 [2021-04-15 02:24:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:33,933 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40800 transitions. [2021-04-15 02:24:33,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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) [2021-04-15 02:24:33,933 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40800 transitions. [2021-04-15 02:24:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-04-15 02:24:33,940 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:33,940 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:34,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-04-15 02:24:34,140 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:34,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:34,141 INFO L82 PathProgramCache]: Analyzing trace with hash 655261526, now seen corresponding path program 230 times [2021-04-15 02:24:34,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:34,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32967701] [2021-04-15 02:24:34,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:24:34,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32967701] [2021-04-15 02:24:34,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679895429] [2021-04-15 02:24:34,282 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 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 [2021-04-15 02:24:34,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:24:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:34,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-04-15 02:24:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:24:34,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:34,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-04-15 02:24:34,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929543528] [2021-04-15 02:24:34,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 02:24:34,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:34,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 02:24:34,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:24:34,466 INFO L87 Difference]: Start difference. First operand 12454 states and 40800 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-04-15 02:24:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:34,684 INFO L93 Difference]: Finished difference Result 16028 states and 51289 transitions. [2021-04-15 02:24:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 02:24:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 22 [2021-04-15 02:24:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:34,709 INFO L225 Difference]: With dead ends: 16028 [2021-04-15 02:24:34,709 INFO L226 Difference]: Without dead ends: 16028 [2021-04-15 02:24:34,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-04-15 02:24:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16028 states. [2021-04-15 02:24:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16028 to 12891. [2021-04-15 02:24:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 3.2592707525213345) internal successors, (42012), 12890 states have internal predecessors, (42012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 42012 transitions. [2021-04-15 02:24:34,923 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 42012 transitions. Word has length 22 [2021-04-15 02:24:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:34,923 INFO L480 AbstractCegarLoop]: Abstraction has 12891 states and 42012 transitions. [2021-04-15 02:24:34,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-04-15 02:24:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 42012 transitions. [2021-04-15 02:24:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 02:24:34,932 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:34,932 INFO L551 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:35,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3428,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:24:35,132 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash -548365066, now seen corresponding path program 231 times [2021-04-15 02:24:35,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:35,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185570450] [2021-04-15 02:24:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:24:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185570450] [2021-04-15 02:24:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866410047] [2021-04-15 02:24:35,285 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 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 [2021-04-15 02:24:35,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 02:24:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-04-15 02:24:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 02:24:35,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:24:35,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-04-15 02:24:35,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065715896] [2021-04-15 02:24:35,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-04-15 02:24:35,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:24:35,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-04-15 02:24:35,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-04-15 02:24:35,489 INFO L87 Difference]: Start difference. First operand 12891 states and 42012 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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) [2021-04-15 02:24:35,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:24:35,742 INFO L93 Difference]: Finished difference Result 17733 states and 56311 transitions. [2021-04-15 02:24:35,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 02:24:35,742 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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 23 [2021-04-15 02:24:35,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:24:35,771 INFO L225 Difference]: With dead ends: 17733 [2021-04-15 02:24:35,772 INFO L226 Difference]: Without dead ends: 17728 [2021-04-15 02:24:35,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-04-15 02:24:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-04-15 02:24:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 13517. [2021-04-15 02:24:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13517 states, 13516 states have (on average 3.222033145901154) internal successors, (43549), 13516 states have internal predecessors, (43549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:24:35,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 43549 transitions. [2021-04-15 02:24:35,995 INFO L78 Accepts]: Start accepts. Automaton has 13517 states and 43549 transitions. Word has length 23 [2021-04-15 02:24:35,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:24:35,995 INFO L480 AbstractCegarLoop]: Abstraction has 13517 states and 43549 transitions. [2021-04-15 02:24:35,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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) [2021-04-15 02:24:35,995 INFO L276 IsEmpty]: Start isEmpty. Operand 13517 states and 43549 transitions. [2021-04-15 02:24:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:24:36,005 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:24:36,005 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:24:36,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3429 [2021-04-15 02:24:36,206 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:24:36,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:24:36,206 INFO L82 PathProgramCache]: Analyzing trace with hash 793916246, now seen corresponding path program 232 times [2021-04-15 02:24:36,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:24:36,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953674227] [2021-04-15 02:24:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:24:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:24:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:24:36,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953674227] [2021-04-15 02:24:36,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194956622] [2021-04-15 02:24:36,303 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 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 [2021-04-15 02:24:36,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:24:36,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:24:36,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:24:36,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:24:36,968 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:24:36,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:24:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:24:39,174 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1638 DAG size of output: 1292 [2021-04-15 02:24:41,750 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1157 DAG size of output: 988 [2021-04-15 02:24:41,976 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1651 [2021-04-15 02:24:42,249 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 3473 DAG size of output: 2737 [2021-04-15 02:24:42,630 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 3473 DAG size of output: 2737 [2021-04-15 02:24:43,015 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 3492 DAG size of output: 2756 [2021-04-15 02:24:43,542 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 2758 DAG size of output: 3679 [2021-04-15 02:24:43,872 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 2552 [2021-04-15 02:24:43,982 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1209 DAG size of output: 1223 [2021-04-15 02:24:46,375 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 467 [2021-04-15 02:24:47,965 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 712 DAG size of output: 645 [2021-04-15 02:24:48,085 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 837 [2021-04-15 02:24:48,237 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1096 [2021-04-15 02:24:48,383 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1052 DAG size of output: 1043 [2021-04-15 02:24:48,638 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 1725 DAG size of output: 1619 [2021-04-15 02:24:48,955 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 1739 DAG size of output: 1628 [2021-04-15 02:24:49,082 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 651 [2021-04-15 02:24:51,133 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1276 DAG size of output: 1173 [2021-04-15 02:24:51,254 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1289 DAG size of output: 1181 [2021-04-15 02:24:51,407 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1556 DAG size of output: 1523 [2021-04-15 02:24:51,575 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1455 [2021-04-15 02:24:51,834 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 2870 DAG size of output: 1855 [2021-04-15 02:24:54,055 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 964 [2021-04-15 02:24:54,228 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 1222 DAG size of output: 1146 [2021-04-15 02:24:54,440 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 1530 DAG size of output: 1512 [2021-04-15 02:24:54,672 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1547 DAG size of output: 1524 [2021-04-15 02:24:54,849 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1820 DAG size of output: 1458 [2021-04-15 02:24:56,764 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1818 [2021-04-15 02:24:57,299 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 4904 DAG size of output: 3134 [2021-04-15 02:24:57,960 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 4940 DAG size of output: 3174 [2021-04-15 02:24:58,120 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1538 DAG size of output: 1552 [2021-04-15 02:24:58,379 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 2482 [2021-04-15 02:24:58,610 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 1397 DAG size of output: 1834 [2021-04-15 02:24:58,732 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1330 [2021-04-15 02:24:58,846 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 994 [2021-04-15 02:25:01,300 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1363 [2021-04-15 02:25:02,496 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2300 DAG size of output: 1851 [2021-04-15 02:25:02,741 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 2363 DAG size of output: 1905 [2021-04-15 02:25:03,056 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 2726 DAG size of output: 2229 [2021-04-15 02:25:03,368 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 2737 DAG size of output: 2236 [2021-04-15 02:25:03,722 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 3069 DAG size of output: 2582 [2021-04-15 02:25:06,312 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1614 DAG size of output: 1284 [2021-04-15 02:25:06,498 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 2048 DAG size of output: 1621 [2021-04-15 02:25:06,772 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 2477 DAG size of output: 2092 [2021-04-15 02:25:07,017 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2493 DAG size of output: 2103 [2021-04-15 02:25:07,612 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 5158 DAG size of output: 4297 [2021-04-15 02:25:08,298 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 5959 DAG size of output: 4172 [2021-04-15 02:25:08,550 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1525 DAG size of output: 2024 [2021-04-15 02:25:08,672 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 1458 [2021-04-15 02:25:08,847 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 1083 [2021-04-15 02:25:08,967 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 1070 [2021-04-15 02:25:11,631 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1221 DAG size of output: 1101 [2021-04-15 02:25:13,916 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 1638 [2021-04-15 02:25:14,225 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2296 DAG size of output: 2045 [2021-04-15 02:25:14,531 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 2583 DAG size of output: 2455 [2021-04-15 02:25:14,853 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 2598 DAG size of output: 2465 [2021-04-15 02:25:15,075 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 1004 [2021-04-15 02:25:15,184 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 884 [2021-04-15 02:25:19,735 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1787 DAG size of output: 1475 [2021-04-15 02:25:19,914 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1799 DAG size of output: 1483 [2021-04-15 02:25:20,195 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 2263 DAG size of output: 2046 [2021-04-15 02:25:20,485 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 2664 DAG size of output: 2392 [2021-04-15 02:25:20,840 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 3070 DAG size of output: 2767 [2021-04-15 02:25:21,572 WARN L205 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 5343 DAG size of output: 4709 [2021-04-15 02:25:22,299 WARN L205 SmtUtils]: Spent 698.00 ms on a formula simplification. DAG size of input: 5998 DAG size of output: 4595 [2021-04-15 02:25:23,369 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 11190 DAG size of output: 5719 [2021-04-15 02:25:24,501 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 11226 DAG size of output: 5758 [2021-04-15 02:25:26,216 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 15533 DAG size of output: 8496 [2021-04-15 02:25:26,562 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 2647 DAG size of output: 2679 [2021-04-15 02:25:27,095 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 2641 DAG size of output: 4138 [2021-04-15 02:25:27,616 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 2295 DAG size of output: 2826 [2021-04-15 02:25:27,857 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2259 DAG size of output: 2258 [2021-04-15 02:25:27,991 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 1366 [2021-04-15 02:25:31,585 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1149 [2021-04-15 02:25:31,807 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1747 [2021-04-15 02:25:32,043 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1794 [2021-04-15 02:25:32,310 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2318 DAG size of output: 2004 [2021-04-15 02:25:32,622 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2686 DAG size of output: 2289 [2021-04-15 02:25:32,992 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 2701 DAG size of output: 2300 [2021-04-15 02:25:33,121 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 746 DAG size of output: 958 [2021-04-15 02:25:33,244 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 741 DAG size of output: 997 [2021-04-15 02:25:35,582 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1527 DAG size of output: 1171 [2021-04-15 02:25:35,767 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1987 DAG size of output: 1552 [2021-04-15 02:25:35,999 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2325 DAG size of output: 1902 [2021-04-15 02:25:36,611 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 4792 DAG size of output: 3943 [2021-04-15 02:25:36,809 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1175 DAG size of output: 1420 [2021-04-15 02:25:38,961 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1420 DAG size of output: 1268 [2021-04-15 02:25:40,443 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 1094 [2021-04-15 02:25:40,722 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 2515 DAG size of output: 2119 [2021-04-15 02:25:41,036 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2977 DAG size of output: 2622 [2021-04-15 02:25:41,939 WARN L205 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 7318 DAG size of output: 6138 [2021-04-15 02:25:42,963 WARN L205 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 8735 DAG size of output: 6006 [2021-04-15 02:25:43,550 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 2538 DAG size of output: 3128 [2021-04-15 02:25:44,033 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 2504 DAG size of output: 3286 [2021-04-15 02:25:44,541 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 2482 DAG size of output: 3435 [2021-04-15 02:25:45,083 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 2478 DAG size of output: 3203 [2021-04-15 02:25:45,339 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 2472 DAG size of output: 2472 [2021-04-15 02:25:45,545 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1280 DAG size of output: 1603 [2021-04-15 02:25:45,657 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 1277 [2021-04-15 02:25:52,036 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 2046 DAG size of output: 1220 [2021-04-15 02:25:52,291 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 1472 DAG size of output: 1924 [2021-04-15 02:25:52,427 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 1430 [2021-04-15 02:25:57,687 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1881 DAG size of output: 1160 [2021-04-15 02:25:57,905 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 758 DAG size of output: 1041 [2021-04-15 02:26:02,284 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1772 DAG size of output: 1022 [2021-04-15 02:26:02,524 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2892 DAG size of output: 1736 [2021-04-15 02:26:02,939 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 4666 DAG size of output: 2727 [2021-04-15 02:26:03,654 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 5929 DAG size of output: 4398 [2021-04-15 02:26:04,567 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 7205 DAG size of output: 5889 [2021-04-15 02:26:05,642 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 8212 DAG size of output: 6910 [2021-04-15 02:26:06,842 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 9263 DAG size of output: 6781 [2021-04-15 02:26:08,516 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 16365 DAG size of output: 8416 [2021-04-15 02:26:10,274 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 16417 DAG size of output: 8471 [2021-04-15 02:26:13,751 WARN L205 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 26090 DAG size of output: 13572 [2021-04-15 02:26:17,224 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 26090 DAG size of output: 13572 [2021-04-15 02:26:20,838 WARN L205 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 26099 DAG size of output: 13581 [2021-04-15 02:26:24,016 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 13583 DAG size of output: 13719 [2021-04-15 02:26:25,355 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 5410 DAG size of output: 6613 [2021-04-15 02:26:25,918 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 4745 DAG size of output: 2684 [2021-04-15 02:26:26,410 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 1914 DAG size of output: 2212 [2021-04-15 02:26:26,577 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1410 DAG size of output: 1302 [2021-04-15 02:26:26,752 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 783 DAG size of output: 1024 [2021-04-15 02:26:27,417 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 1031 [2021-04-15 02:26:28,662 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 811 [2021-04-15 02:26:31,510 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1119 [2021-04-15 02:26:31,761 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 2952 DAG size of output: 1734 [2021-04-15 02:26:31,944 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1208 DAG size of output: 1115 [2021-04-15 02:26:32,117 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 917 DAG size of output: 1232 [2021-04-15 02:26:34,672 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1580 DAG size of output: 949 [2021-04-15 02:26:35,524 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1995 DAG size of output: 1129 [2021-04-15 02:26:36,013 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 4347 DAG size of output: 2528 [2021-04-15 02:26:36,535 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 5124 DAG size of output: 3021 [2021-04-15 02:26:37,164 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 2909 DAG size of output: 3206 [2021-04-15 02:26:37,386 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1719 DAG size of output: 791 [2021-04-15 02:26:37,517 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 821 [2021-04-15 02:26:41,037 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1172 [2021-04-15 02:26:42,126 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2000 DAG size of output: 1421 [2021-04-15 02:26:42,416 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 2000 DAG size of output: 1421 [2021-04-15 02:26:42,595 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1951 DAG size of output: 839 [2021-04-15 02:26:42,721 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 782 [2021-04-15 02:26:43,408 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 841 [2021-04-15 02:26:45,663 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 841 [2021-04-15 02:26:45,821 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1024 [2021-04-15 02:26:45,979 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1024 [2021-04-15 02:26:46,390 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 2986 DAG size of output: 2108 [2021-04-15 02:26:47,205 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 7615 DAG size of output: 3627 [2021-04-15 02:26:49,779 WARN L205 SmtUtils]: Spent 2.51 s on a formula simplification. DAG size of input: 9581 DAG size of output: 10699 [2021-04-15 02:26:50,973 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 7234 DAG size of output: 4615 [2021-04-15 02:26:51,807 WARN L205 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 2653 DAG size of output: 3353 [2021-04-15 02:26:52,216 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 2489 DAG size of output: 2089 [2021-04-15 02:26:52,394 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 779 [2021-04-15 02:26:53,724 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1735 DAG size of output: 1728 [2021-04-15 02:26:53,982 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1591 [2021-04-15 02:26:54,119 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1253 DAG size of output: 1253 [2021-04-15 02:26:54,250 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 1234 [2021-04-15 02:26:54,820 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 920 DAG size of output: 920 [2021-04-15 02:26:55,623 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1502 DAG size of output: 981 [2021-04-15 02:26:56,825 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1944 DAG size of output: 1276 [2021-04-15 02:26:58,183 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 987 DAG size of output: 712 [2021-04-15 02:26:58,662 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 2819 DAG size of output: 1830 [2021-04-15 02:26:59,021 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 3486 DAG size of output: 2105 [2021-04-15 02:26:59,271 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 1139 [2021-04-15 02:26:59,400 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 920 [2021-04-15 02:27:01,179 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1024 DAG size of output: 673 [2021-04-15 02:27:01,364 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 798 [2021-04-15 02:27:01,493 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 1016 [2021-04-15 02:27:03,693 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1002 [2021-04-15 02:27:03,959 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2268 DAG size of output: 1507 [2021-04-15 02:27:05,561 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 2814 DAG size of output: 1745 [2021-04-15 02:27:06,310 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 5877 DAG size of output: 3455 [2021-04-15 02:27:07,230 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 7567 DAG size of output: 4263 [2021-04-15 02:27:08,519 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 5600 DAG size of output: 6515 [2021-04-15 02:27:09,250 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 4846 DAG size of output: 3209 [2021-04-15 02:27:09,533 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 1906 DAG size of output: 1558 [2021-04-15 02:27:09,811 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1757 [2021-04-15 02:27:09,953 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 1296 [2021-04-15 02:27:11,682 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1442 DAG size of output: 914 [2021-04-15 02:27:13,135 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 2102 DAG size of output: 1248 [2021-04-15 02:27:14,084 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 2533 DAG size of output: 1385 [2021-04-15 02:27:14,492 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 3729 DAG size of output: 2097 [2021-04-15 02:27:14,721 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 2348 DAG size of output: 960 [2021-04-15 02:27:14,871 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 809 [2021-04-15 02:27:17,360 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1347 DAG size of output: 811 [2021-04-15 02:27:18,210 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 937 [2021-04-15 02:27:18,374 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 937 [2021-04-15 02:27:18,933 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 5099 DAG size of output: 2657 [2021-04-15 02:27:20,422 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 11321 DAG size of output: 6137 [2021-04-15 02:27:22,816 WARN L205 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 17534 DAG size of output: 8794 [2021-04-15 02:27:25,279 WARN L205 SmtUtils]: Spent 2.38 s on a formula simplification. DAG size of input: 17534 DAG size of output: 8794 [2021-04-15 02:27:27,854 WARN L205 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 17544 DAG size of output: 8800 [2021-04-15 02:27:29,867 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 8802 DAG size of output: 6883 [2021-04-15 02:27:30,825 WARN L205 SmtUtils]: Spent 911.00 ms on a formula simplification. DAG size of input: 4087 DAG size of output: 4537 [2021-04-15 02:27:31,256 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 3359 DAG size of output: 2401 [2021-04-15 02:27:32,103 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 783 DAG size of output: 1033 [2021-04-15 02:27:32,238 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 751 [2021-04-15 02:27:35,050 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1632 DAG size of output: 1052 [2021-04-15 02:27:37,681 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1398 DAG size of output: 729 [2021-04-15 02:27:37,823 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1595 DAG size of output: 900 [2021-04-15 02:27:39,114 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2284 DAG size of output: 1379 [2021-04-15 02:27:39,362 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 2362 DAG size of output: 1396 [2021-04-15 02:27:39,779 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 3520 DAG size of output: 1977 [2021-04-15 02:27:40,541 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 1062 [2021-04-15 02:27:42,069 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1033 DAG size of output: 538 [2021-04-15 02:27:44,117 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 1921 DAG size of output: 851 [2021-04-15 02:27:44,889 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 6251 DAG size of output: 3213 [2021-04-15 02:27:45,913 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 7549 DAG size of output: 3873 [2021-04-15 02:27:47,135 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 10070 DAG size of output: 4216 [2021-04-15 02:27:48,358 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 10070 DAG size of output: 4216 [2021-04-15 02:27:49,558 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 10076 DAG size of output: 4222 [2021-04-15 02:27:50,102 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 4224 DAG size of output: 2082 [2021-04-15 02:27:50,419 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 1920 DAG size of output: 1819 [2021-04-15 02:27:50,663 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1803 DAG size of output: 1782 [2021-04-15 02:27:51,236 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1553 DAG size of output: 1546 [2021-04-15 02:27:51,423 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1489 DAG size of output: 821 [2021-04-15 02:27:52,702 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1210 DAG size of output: 857 [2021-04-15 02:27:52,955 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 918 [2021-04-15 02:27:53,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:27:53,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:53,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:27:53,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-04-15 02:27:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:27:53,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:27:53,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-04-15 02:27:53,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278623833] [2021-04-15 02:27:53,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:27:53,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:27:53,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:27:53,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:27:53,899 INFO L87 Difference]: Start difference. First operand 13517 states and 43549 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:54,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:27:54,188 INFO L93 Difference]: Finished difference Result 13801 states and 44168 transitions. [2021-04-15 02:27:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:27:54,189 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:27:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:27:54,209 INFO L225 Difference]: With dead ends: 13801 [2021-04-15 02:27:54,209 INFO L226 Difference]: Without dead ends: 13798 [2021-04-15 02:27:54,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:27:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13798 states. [2021-04-15 02:27:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13798 to 13640. [2021-04-15 02:27:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13640 states, 13639 states have (on average 3.22179045384559) internal successors, (43942), 13639 states have internal predecessors, (43942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:54,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 43942 transitions. [2021-04-15 02:27:54,406 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 43942 transitions. Word has length 24 [2021-04-15 02:27:54,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:27:54,406 INFO L480 AbstractCegarLoop]: Abstraction has 13640 states and 43942 transitions. [2021-04-15 02:27:54,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:27:54,407 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 43942 transitions. [2021-04-15 02:27:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:27:54,416 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:27:54,416 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:27:54,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-04-15 02:27:54,621 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:27:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:27:54,621 INFO L82 PathProgramCache]: Analyzing trace with hash 802713344, now seen corresponding path program 233 times [2021-04-15 02:27:54,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:27:54,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874893220] [2021-04-15 02:27:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:27:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:27:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:27:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874893220] [2021-04-15 02:27:54,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535348877] [2021-04-15 02:27:54,720 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 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 [2021-04-15 02:27:54,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 02:27:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:27:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:27:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:27:55,429 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:27:55,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:27:55,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:27:57,263 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 501 [2021-04-15 02:27:58,913 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 781 DAG size of output: 644 [2021-04-15 02:27:59,165 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 2372 DAG size of output: 1768 [2021-04-15 02:27:59,347 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 2372 DAG size of output: 1768 [2021-04-15 02:27:59,552 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 2394 DAG size of output: 1790 [2021-04-15 02:27:59,701 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1782 DAG size of output: 1774 [2021-04-15 02:27:59,901 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1776 DAG size of output: 1879 [2021-04-15 02:28:00,081 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1791 [2021-04-15 02:28:00,287 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1768 DAG size of output: 1768 [2021-04-15 02:28:03,753 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1694 DAG size of output: 1131 [2021-04-15 02:28:03,941 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1737 DAG size of output: 1175 [2021-04-15 02:28:04,133 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 1463 [2021-04-15 02:28:04,357 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1055 DAG size of output: 1370 [2021-04-15 02:28:07,709 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1807 DAG size of output: 1239 [2021-04-15 02:28:07,907 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 2561 DAG size of output: 1548 [2021-04-15 02:28:08,110 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2626 DAG size of output: 1613 [2021-04-15 02:28:08,507 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 4469 DAG size of output: 2679 [2021-04-15 02:28:08,931 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 4518 DAG size of output: 2724 [2021-04-15 02:28:09,443 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 4549 DAG size of output: 2749 [2021-04-15 02:28:09,887 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 4549 DAG size of output: 2749 [2021-04-15 02:28:10,621 WARN L205 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 4560 DAG size of output: 3263 [2021-04-15 02:28:11,043 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 2535 DAG size of output: 2376 [2021-04-15 02:28:11,232 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1656 DAG size of output: 1457 [2021-04-15 02:28:11,485 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 1895 [2021-04-15 02:28:11,686 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1604 [2021-04-15 02:28:11,812 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1403 DAG size of output: 1401 [2021-04-15 02:28:11,976 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1379 DAG size of output: 1475 [2021-04-15 02:28:12,120 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1375 DAG size of output: 1390 [2021-04-15 02:28:12,306 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1360 DAG size of output: 1356 [2021-04-15 02:28:15,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 2149 DAG size of output: 869 [2021-04-15 02:28:15,299 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 2918 DAG size of output: 1198 [2021-04-15 02:28:15,476 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 2918 DAG size of output: 1198 [2021-04-15 02:28:15,665 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 2924 DAG size of output: 1204 [2021-04-15 02:28:15,819 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1223 [2021-04-15 02:28:16,044 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 1369 [2021-04-15 02:28:17,731 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 297 [2021-04-15 02:28:18,472 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1387 DAG size of output: 866 [2021-04-15 02:28:19,641 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 465 [2021-04-15 02:28:20,039 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 2076 DAG size of output: 1306 [2021-04-15 02:28:20,242 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1362 [2021-04-15 02:28:21,327 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 543 [2021-04-15 02:28:23,440 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1425 DAG size of output: 901 [2021-04-15 02:28:23,616 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 2035 DAG size of output: 1229 [2021-04-15 02:28:23,802 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 2135 DAG size of output: 1280 [2021-04-15 02:28:24,196 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 3612 DAG size of output: 2109 [2021-04-15 02:28:24,619 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 3756 DAG size of output: 2177 [2021-04-15 02:28:24,825 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1051 DAG size of output: 1315 [2021-04-15 02:28:30,025 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 1244 [2021-04-15 02:28:30,169 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 698 DAG size of output: 901 [2021-04-15 02:28:32,621 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1456 DAG size of output: 987 [2021-04-15 02:28:34,092 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2083 DAG size of output: 1372 [2021-04-15 02:28:34,432 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 3330 DAG size of output: 2098 [2021-04-15 02:28:34,871 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 4362 DAG size of output: 2671 [2021-04-15 02:28:35,364 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 4824 DAG size of output: 2898 [2021-04-15 02:28:36,309 WARN L205 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 7881 DAG size of output: 4334 [2021-04-15 02:28:37,318 WARN L205 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 8087 DAG size of output: 4543 [2021-04-15 02:28:38,284 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 8087 DAG size of output: 4543 [2021-04-15 02:28:39,324 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 8090 DAG size of output: 4527 [2021-04-15 02:28:39,996 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 4523 DAG size of output: 4400 [2021-04-15 02:28:40,891 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 4402 DAG size of output: 4688 [2021-04-15 02:28:41,343 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 2760 DAG size of output: 2375 [2021-04-15 02:28:41,578 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1674 DAG size of output: 1559 [2021-04-15 02:28:41,886 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1503 DAG size of output: 1502 [2021-04-15 02:28:42,033 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1416 DAG size of output: 1416 [2021-04-15 02:28:43,809 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1498 DAG size of output: 746 [2021-04-15 02:28:44,294 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1671 DAG size of output: 806 [2021-04-15 02:28:44,714 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 2499 DAG size of output: 2090 [2021-04-15 02:28:44,882 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 1300 [2021-04-15 02:28:45,057 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1208 DAG size of output: 1208 [2021-04-15 02:28:45,183 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 1177 [2021-04-15 02:28:46,613 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 635 [2021-04-15 02:28:47,150 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1777 DAG size of output: 800 [2021-04-15 02:28:47,406 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1262 [2021-04-15 02:28:47,666 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1262 [2021-04-15 02:28:47,937 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 3149 DAG size of output: 1267 [2021-04-15 02:28:49,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:28:49,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:49,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:28:49,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-04-15 02:28:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:28:49,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:28:49,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-04-15 02:28:49,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196984322] [2021-04-15 02:28:49,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:28:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:28:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:28:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:28:49,839 INFO L87 Difference]: Start difference. First operand 13640 states and 43942 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:28:50,307 INFO L93 Difference]: Finished difference Result 14010 states and 44824 transitions. [2021-04-15 02:28:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:28:50,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:28:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:28:50,330 INFO L225 Difference]: With dead ends: 14010 [2021-04-15 02:28:50,330 INFO L226 Difference]: Without dead ends: 14007 [2021-04-15 02:28:50,331 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:28:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2021-04-15 02:28:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 13806. [2021-04-15 02:28:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.2249185077870335) internal successors, (44520), 13805 states have internal predecessors, (44520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 44520 transitions. [2021-04-15 02:28:50,543 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 44520 transitions. Word has length 24 [2021-04-15 02:28:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:28:50,543 INFO L480 AbstractCegarLoop]: Abstraction has 13806 states and 44520 transitions. [2021-04-15 02:28:50,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:28:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 44520 transitions. [2021-04-15 02:28:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:28:50,553 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:28:50,553 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:28:50,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32790,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:28:50,758 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:28:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:28:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash -629300488, now seen corresponding path program 234 times [2021-04-15 02:28:50,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:28:50,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634023741] [2021-04-15 02:28:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:28:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:28:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:28:50,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634023741] [2021-04-15 02:28:50,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376819789] [2021-04-15 02:28:50,856 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 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 [2021-04-15 02:28:50,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 02:28:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:28:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:28:50,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:28:51,534 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:28:51,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:28:51,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:28:54,190 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1885 DAG size of output: 918 [2021-04-15 02:28:54,321 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1911 DAG size of output: 943 [2021-04-15 02:28:54,452 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1911 DAG size of output: 943 [2021-04-15 02:28:54,589 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1924 DAG size of output: 957 [2021-04-15 02:28:54,712 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 1017 [2021-04-15 02:28:56,693 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1697 DAG size of output: 1125 [2021-04-15 02:28:56,821 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1697 DAG size of output: 1125 [2021-04-15 02:28:56,954 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1707 DAG size of output: 1135 [2021-04-15 02:28:57,115 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 1336 [2021-04-15 02:29:00,010 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1373 DAG size of output: 1011 [2021-04-15 02:29:00,196 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1396 DAG size of output: 1028 [2021-04-15 02:29:01,495 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1806 DAG size of output: 1363 [2021-04-15 02:29:03,408 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 797 [2021-04-15 02:29:03,877 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 2473 DAG size of output: 1978 [2021-04-15 02:29:03,995 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 929 [2021-04-15 02:29:06,248 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 836 [2021-04-15 02:29:07,114 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 366 [2021-04-15 02:29:07,309 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1001 [2021-04-15 02:29:08,675 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 611 [2021-04-15 02:29:09,395 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1207 DAG size of output: 955 [2021-04-15 02:29:10,275 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 835 DAG size of output: 619 [2021-04-15 02:29:10,548 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1264 [2021-04-15 02:29:12,142 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 999 DAG size of output: 630 [2021-04-15 02:29:12,458 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 2374 DAG size of output: 1590 [2021-04-15 02:29:12,787 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1600 [2021-04-15 02:29:13,399 WARN L205 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 3265 DAG size of output: 2312 [2021-04-15 02:29:14,396 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 5311 DAG size of output: 3930 [2021-04-15 02:29:15,458 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 5311 DAG size of output: 3930 [2021-04-15 02:29:16,569 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 5318 DAG size of output: 3937 [2021-04-15 02:29:17,536 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 3939 DAG size of output: 3258 [2021-04-15 02:29:18,242 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 3140 DAG size of output: 3099 [2021-04-15 02:29:18,484 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1068 DAG size of output: 1075 [2021-04-15 02:29:18,675 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1062 DAG size of output: 1031 [2021-04-15 02:29:18,912 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 1093 [2021-04-15 02:29:19,057 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 939 DAG size of output: 938 [2021-04-15 02:29:19,588 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 585 [2021-04-15 02:29:20,718 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 1760 DAG size of output: 1758 [2021-04-15 02:29:21,041 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1196 DAG size of output: 1196 [2021-04-15 02:29:21,219 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 835 [2021-04-15 02:29:23,396 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 646 [2021-04-15 02:29:24,026 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1968 DAG size of output: 788 [2021-04-15 02:29:25,385 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 3547 DAG size of output: 1474 [2021-04-15 02:29:25,728 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 3827 DAG size of output: 1502 [2021-04-15 02:29:26,104 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 3827 DAG size of output: 1502 [2021-04-15 02:29:26,460 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 3831 DAG size of output: 1506 [2021-04-15 02:29:26,792 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 1508 DAG size of output: 1846 [2021-04-15 02:29:27,098 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 1439 DAG size of output: 1661 [2021-04-15 02:29:27,311 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1351 DAG size of output: 1419 [2021-04-15 02:29:28,004 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1327 DAG size of output: 1293 [2021-04-15 02:29:28,150 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 1224 [2021-04-15 02:29:31,816 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1964 DAG size of output: 1228 [2021-04-15 02:29:32,219 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 2067 DAG size of output: 1291 [2021-04-15 02:29:32,428 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 2378 DAG size of output: 1331 [2021-04-15 02:29:34,617 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 3284 DAG size of output: 1905 [2021-04-15 02:29:34,741 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 747 [2021-04-15 02:29:37,322 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 822 [2021-04-15 02:29:37,453 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1600 DAG size of output: 887 [2021-04-15 02:29:38,992 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 1366 [2021-04-15 02:29:39,506 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 5160 DAG size of output: 2757 [2021-04-15 02:29:40,031 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 5160 DAG size of output: 2757 [2021-04-15 02:29:40,597 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 5163 DAG size of output: 2759 [2021-04-15 02:29:41,046 WARN L205 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 2762 DAG size of output: 2349 [2021-04-15 02:29:41,358 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 1795 DAG size of output: 1895 [2021-04-15 02:29:41,477 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 1141 [2021-04-15 02:29:43,493 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1815 DAG size of output: 901 [2021-04-15 02:29:44,423 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2334 DAG size of output: 1195 [2021-04-15 02:29:44,591 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 2334 DAG size of output: 1195 [2021-04-15 02:29:44,763 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 2337 DAG size of output: 1198 [2021-04-15 02:29:44,895 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 1179 [2021-04-15 02:29:46,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:29:46,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:46,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:29:46,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-04-15 02:29:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:29:46,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:29:46,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-04-15 02:29:46,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611510904] [2021-04-15 02:29:46,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:29:46,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:29:46,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:29:46,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:46,079 INFO L87 Difference]: Start difference. First operand 13806 states and 44520 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:29:46,610 INFO L93 Difference]: Finished difference Result 14223 states and 45525 transitions. [2021-04-15 02:29:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:29:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:29:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:29:46,632 INFO L225 Difference]: With dead ends: 14223 [2021-04-15 02:29:46,632 INFO L226 Difference]: Without dead ends: 14220 [2021-04-15 02:29:46,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:29:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14220 states. [2021-04-15 02:29:46,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14220 to 13986. [2021-04-15 02:29:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13986 states, 13985 states have (on average 3.229245620307472) internal successors, (45161), 13985 states have internal predecessors, (45161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13986 states to 13986 states and 45161 transitions. [2021-04-15 02:29:46,843 INFO L78 Accepts]: Start accepts. Automaton has 13986 states and 45161 transitions. Word has length 24 [2021-04-15 02:29:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:29:46,843 INFO L480 AbstractCegarLoop]: Abstraction has 13986 states and 45161 transitions. [2021-04-15 02:29:46,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:29:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13986 states and 45161 transitions. [2021-04-15 02:29:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:29:46,853 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:29:46,853 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:29:47,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42750,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:29:47,070 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:29:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:29:47,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2072056320, now seen corresponding path program 235 times [2021-04-15 02:29:47,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:29:47,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498370129] [2021-04-15 02:29:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:29:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:29:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498370129] [2021-04-15 02:29:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653552487] [2021-04-15 02:29:47,187 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 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 [2021-04-15 02:29:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:29:47,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:29:47,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:29:47,885 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:29:47,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:29:47,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:29:51,176 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 759 DAG size of output: 688 [2021-04-15 02:29:51,527 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 2556 DAG size of output: 2220 [2021-04-15 02:29:51,716 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 2556 DAG size of output: 2220 [2021-04-15 02:29:51,916 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 2567 DAG size of output: 2231 [2021-04-15 02:29:52,092 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 2231 DAG size of output: 2102 [2021-04-15 02:29:54,285 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 1334 [2021-04-15 02:29:54,499 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 1947 [2021-04-15 02:29:54,790 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 1947 [2021-04-15 02:29:55,030 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2901 DAG size of output: 1958 [2021-04-15 02:29:55,187 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1951 DAG size of output: 1839 [2021-04-15 02:29:55,367 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1841 DAG size of output: 1835 [2021-04-15 02:29:55,513 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1812 [2021-04-15 02:29:56,386 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1223 DAG size of output: 1051 [2021-04-15 02:29:56,532 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 643 DAG size of output: 751 [2021-04-15 02:29:57,364 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1641 DAG size of output: 1054 [2021-04-15 02:29:57,494 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1091 [2021-04-15 02:29:57,620 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1091 [2021-04-15 02:29:57,827 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1683 DAG size of output: 1219 [2021-04-15 02:29:57,944 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1134 [2021-04-15 02:29:58,075 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 977 DAG size of output: 1294 [2021-04-15 02:30:01,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:30:01,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:01,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:30:01,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-04-15 02:30:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:30:01,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:30:01,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-04-15 02:30:01,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370257177] [2021-04-15 02:30:01,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:30:01,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:30:01,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:30:01,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:01,258 INFO L87 Difference]: Start difference. First operand 13986 states and 45161 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:30:01,787 INFO L93 Difference]: Finished difference Result 14385 states and 46101 transitions. [2021-04-15 02:30:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:30:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:30:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:30:01,810 INFO L225 Difference]: With dead ends: 14385 [2021-04-15 02:30:01,810 INFO L226 Difference]: Without dead ends: 14382 [2021-04-15 02:30:01,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:30:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14382 states. [2021-04-15 02:30:01,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14382 to 14142. [2021-04-15 02:30:01,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14142 states, 14141 states have (on average 3.233646842514674) internal successors, (45727), 14141 states have internal predecessors, (45727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14142 states to 14142 states and 45727 transitions. [2021-04-15 02:30:02,022 INFO L78 Accepts]: Start accepts. Automaton has 14142 states and 45727 transitions. Word has length 24 [2021-04-15 02:30:02,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:30:02,022 INFO L480 AbstractCegarLoop]: Abstraction has 14142 states and 45727 transitions. [2021-04-15 02:30:02,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:30:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14142 states and 45727 transitions. [2021-04-15 02:30:02,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:30:02,033 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:30:02,033 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:30:02,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49855 [2021-04-15 02:30:02,253 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:30:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:30:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 447153144, now seen corresponding path program 236 times [2021-04-15 02:30:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:30:02,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296001739] [2021-04-15 02:30:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:30:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:30:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 02:30:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296001739] [2021-04-15 02:30:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391517862] [2021-04-15 02:30:02,351 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 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 [2021-04-15 02:30:02,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 02:30:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:30:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:30:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:30:03,040 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:30:03,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:30:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:30:05,487 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 168 [2021-04-15 02:30:06,423 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 2562 DAG size of output: 1823 [2021-04-15 02:30:06,591 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 1839 [2021-04-15 02:30:06,770 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 2605 DAG size of output: 1846 [2021-04-15 02:30:06,950 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 2605 DAG size of output: 1846 [2021-04-15 02:30:07,240 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 2624 DAG size of output: 1865 [2021-04-15 02:30:07,475 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1867 DAG size of output: 2280 [2021-04-15 02:30:07,702 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 1078 [2021-04-15 02:30:07,841 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1242 [2021-04-15 02:30:09,019 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 249 [2021-04-15 02:30:10,725 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 873 [2021-04-15 02:30:10,858 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 964 [2021-04-15 02:30:11,099 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1268 DAG size of output: 1076 [2021-04-15 02:30:11,261 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 1122 [2021-04-15 02:30:12,944 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 1971 DAG size of output: 1455 [2021-04-15 02:30:13,281 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 2040 DAG size of output: 1463 [2021-04-15 02:30:15,081 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 173 [2021-04-15 02:30:16,209 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1213 DAG size of output: 943 [2021-04-15 02:30:16,332 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1017 [2021-04-15 02:30:17,844 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1836 DAG size of output: 1325 [2021-04-15 02:30:18,069 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 2261 DAG size of output: 1632 [2021-04-15 02:30:18,321 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 1736 [2021-04-15 02:30:18,625 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2933 DAG size of output: 2029 [2021-04-15 02:30:18,959 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 3007 DAG size of output: 2053 [2021-04-15 02:30:19,636 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 4540 DAG size of output: 3063 [2021-04-15 02:30:19,774 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1237 [2021-04-15 02:30:24,087 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1343 DAG size of output: 1009 [2021-04-15 02:30:24,263 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1750 DAG size of output: 1348 [2021-04-15 02:30:24,486 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 2122 DAG size of output: 1668 [2021-04-15 02:30:24,756 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2558 DAG size of output: 1972 [2021-04-15 02:30:25,050 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 2908 DAG size of output: 2098 [2021-04-15 02:30:25,466 WARN L205 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 3260 DAG size of output: 2388 [2021-04-15 02:30:25,847 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 3460 DAG size of output: 2480 [2021-04-15 02:30:25,980 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 894 DAG size of output: 1163 [2021-04-15 02:30:27,342 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 692 DAG size of output: 571 [2021-04-15 02:30:30,006 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1104 DAG size of output: 995 [2021-04-15 02:30:30,136 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1029 [2021-04-15 02:30:30,300 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1221 [2021-04-15 02:30:30,540 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2189 DAG size of output: 1663 [2021-04-15 02:30:30,981 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2365 DAG size of output: 1749 [2021-04-15 02:30:31,309 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 2807 DAG size of output: 2066 [2021-04-15 02:30:32,122 WARN L205 SmtUtils]: Spent 795.00 ms on a formula simplification. DAG size of input: 5660 DAG size of output: 4045 [2021-04-15 02:30:33,501 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 8759 DAG size of output: 5980 [2021-04-15 02:30:34,841 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 8784 DAG size of output: 5666 [2021-04-15 02:30:35,034 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1859 DAG size of output: 1819 [2021-04-15 02:30:35,171 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 1793 [2021-04-15 02:30:35,424 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 1766 DAG size of output: 2099 [2021-04-15 02:30:35,546 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 1759 [2021-04-15 02:30:35,701 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 1811 [2021-04-15 02:30:35,816 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 1302 [2021-04-15 02:30:38,261 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1018 [2021-04-15 02:30:38,385 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 1092 [2021-04-15 02:30:38,528 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1240 [2021-04-15 02:30:38,736 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1666 DAG size of output: 1406 [2021-04-15 02:30:38,913 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1849 DAG size of output: 1459 [2021-04-15 02:30:39,162 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2559 DAG size of output: 1973 [2021-04-15 02:30:41,668 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1252 DAG size of output: 1022 [2021-04-15 02:30:41,804 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1530 DAG size of output: 1253 [2021-04-15 02:30:41,967 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 1451 [2021-04-15 02:30:42,157 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1697 [2021-04-15 02:30:42,407 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2695 DAG size of output: 2119 [2021-04-15 02:30:42,962 WARN L205 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 4676 DAG size of output: 3586 [2021-04-15 02:30:46,035 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1379 [2021-04-15 02:30:46,237 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 2017 DAG size of output: 1624 [2021-04-15 02:30:47,016 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 6264 DAG size of output: 4898 [2021-04-15 02:30:47,286 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 1763 DAG size of output: 2470 [2021-04-15 02:30:47,476 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1758 DAG size of output: 1813 [2021-04-15 02:30:47,594 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 1143 [2021-04-15 02:30:51,826 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1984 DAG size of output: 1323 [2021-04-15 02:30:52,037 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 2360 DAG size of output: 1652 [2021-04-15 02:30:52,276 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2630 DAG size of output: 1780 [2021-04-15 02:30:52,569 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 3035 DAG size of output: 2183 [2021-04-15 02:30:53,030 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 4102 DAG size of output: 2959 [2021-04-15 02:30:53,192 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1392 [2021-04-15 02:30:55,598 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1345 DAG size of output: 1115 [2021-04-15 02:30:55,742 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1660 DAG size of output: 1313 [2021-04-15 02:30:55,916 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1913 DAG size of output: 1543 [2021-04-15 02:30:57,273 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1008 DAG size of output: 836 [2021-04-15 02:30:57,526 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 2602 DAG size of output: 2007 [2021-04-15 02:30:57,877 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 3466 DAG size of output: 2722 [2021-04-15 02:30:58,657 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 6799 DAG size of output: 4973 [2021-04-15 02:31:00,234 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 11055 DAG size of output: 8214 [2021-04-15 02:31:02,603 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 11454 DAG size of output: 8236 [2021-04-15 02:31:04,342 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 11488 DAG size of output: 7946 [2021-04-15 02:31:07,502 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 18266 DAG size of output: 12205 [2021-04-15 02:31:10,674 WARN L205 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 18266 DAG size of output: 12205 [2021-04-15 02:31:14,037 WARN L205 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 18281 DAG size of output: 12220 [2021-04-15 02:31:16,284 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 12214 DAG size of output: 11434 [2021-04-15 02:31:19,124 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 11436 DAG size of output: 11343 [2021-04-15 02:31:20,667 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 5060 DAG size of output: 7309 [2021-04-15 02:31:21,315 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 3922 DAG size of output: 2474 [2021-04-15 02:31:21,667 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 2390 [2021-04-15 02:31:21,857 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 1202 [2021-04-15 02:31:22,031 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1202 DAG size of output: 1294 [2021-04-15 02:31:22,700 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 1220 [2021-04-15 02:31:22,874 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 875 DAG size of output: 1277 [2021-04-15 02:31:22,990 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 863 [2021-04-15 02:31:25,123 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1349 DAG size of output: 1036 [2021-04-15 02:31:25,239 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 806 [2021-04-15 02:31:27,332 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 2031 DAG size of output: 1489 [2021-04-15 02:31:27,596 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 2222 DAG size of output: 1620 [2021-04-15 02:31:27,873 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 2223 DAG size of output: 1621 [2021-04-15 02:31:28,062 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1550 [2021-04-15 02:31:28,282 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 1525 DAG size of output: 1650 [2021-04-15 02:31:28,538 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1761 [2021-04-15 02:31:28,719 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 818 [2021-04-15 02:31:30,720 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 976 DAG size of output: 799 [2021-04-15 02:31:30,998 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 1453 DAG size of output: 1737 [2021-04-15 02:31:31,149 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 921 DAG size of output: 1031 [2021-04-15 02:31:32,444 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 787 DAG size of output: 565 [2021-04-15 02:31:32,730 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 1336 [2021-04-15 02:31:33,289 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 1077 [2021-04-15 02:31:34,509 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1401 DAG size of output: 1029 [2021-04-15 02:31:34,740 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2051 DAG size of output: 1488 [2021-04-15 02:31:35,060 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 2632 DAG size of output: 1772 [2021-04-15 02:31:36,066 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 2903 DAG size of output: 1944 [2021-04-15 02:31:36,448 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 2934 DAG size of output: 1961 [2021-04-15 02:31:37,087 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 4648 DAG size of output: 3060 [2021-04-15 02:31:37,767 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 4648 DAG size of output: 3060 [2021-04-15 02:31:38,548 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 4467 DAG size of output: 3439 [2021-04-15 02:31:39,026 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 2696 DAG size of output: 2762 [2021-04-15 02:31:41,160 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 2496 DAG size of output: 2490 [2021-04-15 02:31:41,407 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 1479 DAG size of output: 1676 [2021-04-15 02:31:41,697 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1886 [2021-04-15 02:31:41,934 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 1037 [2021-04-15 02:31:43,402 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1362 DAG size of output: 1407 [2021-04-15 02:31:43,922 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1166 DAG size of output: 1165 [2021-04-15 02:31:44,041 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1139 DAG size of output: 1139 [2021-04-15 02:31:44,148 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 1084 [2021-04-15 02:31:45,352 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1546 DAG size of output: 1061 [2021-04-15 02:31:45,592 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 2257 DAG size of output: 1488 [2021-04-15 02:31:45,721 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 891 [2021-04-15 02:31:48,083 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1187 DAG size of output: 880 [2021-04-15 02:31:48,460 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 2982 DAG size of output: 1893 [2021-04-15 02:31:48,656 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1407 DAG size of output: 1401 [2021-04-15 02:31:48,876 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 1401 DAG size of output: 1408 [2021-04-15 02:31:49,018 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 981 [2021-04-15 02:31:51,610 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1183 DAG size of output: 902 [2021-04-15 02:31:51,861 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 1009 DAG size of output: 1474 [2021-04-15 02:31:53,349 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 772 [2021-04-15 02:31:54,538 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1539 DAG size of output: 1154 [2021-04-15 02:31:54,837 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2441 DAG size of output: 1761 [2021-04-15 02:31:55,150 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 2442 DAG size of output: 1762 [2021-04-15 02:31:55,841 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 4855 DAG size of output: 3087 [2021-04-15 02:31:56,590 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 5468 DAG size of output: 3447 [2021-04-15 02:31:57,549 WARN L205 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 6028 DAG size of output: 3797 [2021-04-15 02:31:58,820 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 9483 DAG size of output: 4911 [2021-04-15 02:32:01,820 WARN L205 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 9493 DAG size of output: 13413 [2021-04-15 02:32:03,237 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 8568 DAG size of output: 5460 [2021-04-15 02:32:04,002 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 4451 DAG size of output: 4124 [2021-04-15 02:32:04,337 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 2673 DAG size of output: 2666 [2021-04-15 02:32:04,771 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 2641 DAG size of output: 2914 [2021-04-15 02:32:05,081 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 2418 DAG size of output: 2418 [2021-04-15 02:32:05,401 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 2345 DAG size of output: 2575 [2021-04-15 02:32:05,654 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 2342 [2021-04-15 02:32:05,902 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 1293 DAG size of output: 1802 [2021-04-15 02:32:06,035 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1287 DAG size of output: 1287 [2021-04-15 02:32:06,717 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 668 DAG size of output: 652 [2021-04-15 02:32:07,222 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1384 DAG size of output: 858 [2021-04-15 02:32:08,331 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 2006 DAG size of output: 1110 [2021-04-15 02:32:08,501 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-04-15 02:32:09,543 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1672 DAG size of output: 1205 [2021-04-15 02:32:09,846 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 3415 DAG size of output: 2104 [2021-04-15 02:32:10,837 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 3759 DAG size of output: 2297 [2021-04-15 02:32:11,221 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 3835 DAG size of output: 2364 [2021-04-15 02:32:11,340 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 1100 [2021-04-15 02:32:11,472 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1041 DAG size of output: 1145 [2021-04-15 02:32:12,091 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 509 DAG size of output: 649 [2021-04-15 02:32:13,095 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 909 [2021-04-15 02:32:15,239 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 808 [2021-04-15 02:32:15,407 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1823 DAG size of output: 1252 [2021-04-15 02:32:15,607 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 1406 [2021-04-15 02:32:15,880 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 1456 [2021-04-15 02:32:16,481 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 5155 DAG size of output: 3245 [2021-04-15 02:32:17,128 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 5190 DAG size of output: 3246 [2021-04-15 02:32:17,536 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 2205 [2021-04-15 02:32:17,821 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 2076 DAG size of output: 2070 [2021-04-15 02:32:18,148 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2070 DAG size of output: 1964 [2021-04-15 02:32:20,598 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1238 DAG size of output: 888 [2021-04-15 02:32:20,940 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 1323 DAG size of output: 1975 [2021-04-15 02:32:21,059 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1003 DAG size of output: 981 [2021-04-15 02:32:22,200 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1292 DAG size of output: 1290 [2021-04-15 02:32:23,524 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 894 [2021-04-15 02:32:23,716 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1256 [2021-04-15 02:32:24,041 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 2711 DAG size of output: 1907 [2021-04-15 02:32:24,423 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 2712 DAG size of output: 1908 [2021-04-15 02:32:25,019 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 2843 DAG size of output: 1949 [2021-04-15 02:32:26,021 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 7349 DAG size of output: 4434 [2021-04-15 02:32:27,074 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 8338 DAG size of output: 4796 [2021-04-15 02:32:28,217 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 6321 DAG size of output: 3609 [2021-04-15 02:32:28,756 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 3609 DAG size of output: 3359 [2021-04-15 02:32:29,183 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 2272 DAG size of output: 2447 [2021-04-15 02:32:29,337 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 1147 [2021-04-15 02:32:29,536 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1033 DAG size of output: 1357 [2021-04-15 02:32:31,024 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 989 DAG size of output: 912 [2021-04-15 02:32:32,750 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 712 [2021-04-15 02:32:33,078 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 1141 [2021-04-15 02:32:33,816 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1907 DAG size of output: 1295 [2021-04-15 02:32:34,064 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 2073 [2021-04-15 02:32:34,424 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 2048 DAG size of output: 2252 [2021-04-15 02:32:35,358 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 2047 DAG size of output: 2493 [2021-04-15 02:32:35,661 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 1899 [2021-04-15 02:32:36,599 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1576 [2021-04-15 02:32:36,765 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 1514 [2021-04-15 02:32:38,062 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1544 DAG size of output: 1064 [2021-04-15 02:32:38,206 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1606 DAG size of output: 1128 [2021-04-15 02:32:38,414 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 2074 DAG size of output: 1426 [2021-04-15 02:32:38,654 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 1548 [2021-04-15 02:32:38,796 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1272 DAG size of output: 1268 [2021-04-15 02:32:38,925 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 1236 [2021-04-15 02:32:40,792 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 976 [2021-04-15 02:32:41,187 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 3210 DAG size of output: 2003 [2021-04-15 02:32:41,590 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 3435 DAG size of output: 2157 [2021-04-15 02:32:42,011 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 3471 DAG size of output: 2176 [2021-04-15 02:32:42,650 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 4709 DAG size of output: 2988 [2021-04-15 02:32:42,917 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 1622 DAG size of output: 1605 [2021-04-15 02:32:43,124 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 1603 DAG size of output: 1603 [2021-04-15 02:32:43,256 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 825 [2021-04-15 02:32:45,843 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1304 DAG size of output: 894 [2021-04-15 02:32:46,119 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 634 [2021-04-15 02:32:48,511 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1438 DAG size of output: 1021 [2021-04-15 02:32:48,818 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2485 DAG size of output: 1693 [2021-04-15 02:32:49,135 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 2486 DAG size of output: 1694 [2021-04-15 02:32:50,089 WARN L205 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 6632 DAG size of output: 4056 [2021-04-15 02:32:51,020 WARN L205 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 6632 DAG size of output: 4056 [2021-04-15 02:32:53,077 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 13263 DAG size of output: 7694 [2021-04-15 02:32:56,464 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 20522 DAG size of output: 11240 [2021-04-15 02:32:59,871 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 20522 DAG size of output: 11240 [2021-04-15 02:33:04,596 WARN L205 SmtUtils]: Spent 4.59 s on a formula simplification. DAG size of input: 20530 DAG size of output: 11901 [2021-04-15 02:33:06,276 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 8921 DAG size of output: 8023 [2021-04-15 02:33:06,457 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 996 DAG size of output: 1000 [2021-04-15 02:33:06,703 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 915 [2021-04-15 02:33:07,456 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1061 DAG size of output: 650 [2021-04-15 02:33:07,980 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 872 [2021-04-15 02:33:08,209 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1284 [2021-04-15 02:33:08,421 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 796 [2021-04-15 02:33:09,220 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 940 DAG size of output: 650 [2021-04-15 02:33:09,402 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 983 DAG size of output: 683 [2021-04-15 02:33:09,600 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 981 DAG size of output: 1117 [2021-04-15 02:33:09,875 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 966 DAG size of output: 1350 [2021-04-15 02:33:10,117 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 1295 [2021-04-15 02:33:10,227 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 864 DAG size of output: 861 [2021-04-15 02:33:11,184 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1464 DAG size of output: 883 [2021-04-15 02:33:12,091 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 1276 [2021-04-15 02:33:12,809 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 2479 DAG size of output: 1516 [2021-04-15 02:33:13,169 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 3059 DAG size of output: 1968 [2021-04-15 02:33:14,469 WARN L205 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 10311 DAG size of output: 6180 [2021-04-15 02:33:15,463 WARN L205 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 4861 DAG size of output: 4452 [2021-04-15 02:33:15,682 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1532 [2021-04-15 02:33:16,821 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1757 DAG size of output: 1030 [2021-04-15 02:33:17,129 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 1585 DAG size of output: 1530 [2021-04-15 02:33:18,003 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1170 DAG size of output: 1308 [2021-04-15 02:33:18,335 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 1135 DAG size of output: 1582 [2021-04-15 02:33:18,996 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1002 DAG size of output: 773 [2021-04-15 02:33:19,252 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 1133 DAG size of output: 1439 [2021-04-15 02:33:19,374 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 892 [2021-04-15 02:33:20,002 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 728 DAG size of output: 728 [2021-04-15 02:33:20,408 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1516 DAG size of output: 930 [2021-04-15 02:33:20,575 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 2136 DAG size of output: 1086 [2021-04-15 02:33:21,243 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2423 DAG size of output: 1259 [2021-04-15 02:33:21,514 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 2840 DAG size of output: 1583 [2021-04-15 02:33:22,136 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 5918 DAG size of output: 3328 [2021-04-15 02:33:24,064 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 14656 DAG size of output: 8395 [2021-04-15 02:33:26,026 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 14656 DAG size of output: 8395 [2021-04-15 02:33:28,020 WARN L205 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 14661 DAG size of output: 8400 [2021-04-15 02:33:29,644 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 8402 DAG size of output: 7384 [2021-04-15 02:33:30,496 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 5666 DAG size of output: 5157 [2021-04-15 02:33:31,751 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 5285 DAG size of output: 2798 [2021-04-15 02:33:32,227 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 2575 DAG size of output: 2688 [2021-04-15 02:33:32,577 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 2434 DAG size of output: 1874 [2021-04-15 02:33:32,786 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1818 DAG size of output: 1079 [2021-04-15 02:33:32,907 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 648 [2021-04-15 02:33:34,459 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 6260 DAG size of output: 2943 [2021-04-15 02:33:35,015 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 6260 DAG size of output: 2943 [2021-04-15 02:33:35,620 WARN L205 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 6264 DAG size of output: 2947 [2021-04-15 02:33:35,893 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 2949 DAG size of output: 1508 [2021-04-15 02:33:36,056 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1478 DAG size of output: 1136 [2021-04-15 02:33:37,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:33:37,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:37,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:33:37,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-04-15 02:33:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:33:37,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:33:37,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-04-15 02:33:37,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734338145] [2021-04-15 02:33:37,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:33:37,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:33:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:33:37,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:37,939 INFO L87 Difference]: Start difference. First operand 14142 states and 45727 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:33:38,478 INFO L93 Difference]: Finished difference Result 14568 states and 46771 transitions. [2021-04-15 02:33:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:33:38,478 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:33:38,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:33:38,498 INFO L225 Difference]: With dead ends: 14568 [2021-04-15 02:33:38,498 INFO L226 Difference]: Without dead ends: 14565 [2021-04-15 02:33:38,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:33:38,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14565 states. [2021-04-15 02:33:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14565 to 14324. [2021-04-15 02:33:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14324 states, 14323 states have (on average 3.239195699225023) internal successors, (46395), 14323 states have internal predecessors, (46395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14324 states to 14324 states and 46395 transitions. [2021-04-15 02:33:38,691 INFO L78 Accepts]: Start accepts. Automaton has 14324 states and 46395 transitions. Word has length 24 [2021-04-15 02:33:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:33:38,692 INFO L480 AbstractCegarLoop]: Abstraction has 14324 states and 46395 transitions. [2021-04-15 02:33:38,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:33:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 14324 states and 46395 transitions. [2021-04-15 02:33:38,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:33:38,702 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:33:38,702 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:33:38,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52761,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 02:33:38,904 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:33:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:33:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1233235200, now seen corresponding path program 237 times [2021-04-15 02:33:38,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:33:38,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793887921] [2021-04-15 02:33:38,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:33:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:33:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:33:38,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793887921] [2021-04-15 02:33:38,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648839693] [2021-04-15 02:33:38,996 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 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 [2021-04-15 02:33:39,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 02:33:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:33:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:33:39,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:33:39,671 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:33:39,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:33:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:33:40,257 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 518 [2021-04-15 02:33:42,069 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1603 DAG size of output: 1381 [2021-04-15 02:33:42,272 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1629 DAG size of output: 1407 [2021-04-15 02:33:42,404 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1629 DAG size of output: 1407 [2021-04-15 02:33:42,557 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1648 DAG size of output: 1426 [2021-04-15 02:33:42,690 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1426 DAG size of output: 1421 [2021-04-15 02:33:42,938 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1982 [2021-04-15 02:33:43,183 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1547 [2021-04-15 02:33:43,372 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1255 DAG size of output: 1557 [2021-04-15 02:33:47,099 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1260 DAG size of output: 962 [2021-04-15 02:33:48,670 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1233 [2021-04-15 02:33:51,976 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 934 DAG size of output: 756 [2021-04-15 02:33:52,243 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1607 DAG size of output: 1177 [2021-04-15 02:33:52,596 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 3045 DAG size of output: 2154 [2021-04-15 02:33:52,980 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 3155 DAG size of output: 2180 [2021-04-15 02:33:56,338 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1481 DAG size of output: 1238 [2021-04-15 02:33:56,578 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1533 DAG size of output: 1275 [2021-04-15 02:33:59,448 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 838 [2021-04-15 02:33:59,588 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1349 DAG size of output: 1007 [2021-04-15 02:33:59,751 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1535 DAG size of output: 1212 [2021-04-15 02:34:00,069 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 2717 DAG size of output: 1910 [2021-04-15 02:34:00,828 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 5471 DAG size of output: 3659 [2021-04-15 02:34:03,679 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1005 DAG size of output: 702 [2021-04-15 02:34:07,186 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1722 DAG size of output: 1054 [2021-04-15 02:34:10,619 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 833 [2021-04-15 02:34:13,946 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1147 DAG size of output: 735 [2021-04-15 02:34:14,162 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 2057 DAG size of output: 1253 [2021-04-15 02:34:14,396 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2136 DAG size of output: 1311 [2021-04-15 02:34:14,825 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 3529 DAG size of output: 2127 [2021-04-15 02:34:16,013 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 8110 DAG size of output: 5148 [2021-04-15 02:34:17,292 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 8597 DAG size of output: 5417 [2021-04-15 02:34:18,689 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 9668 DAG size of output: 6313 [2021-04-15 02:34:20,250 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 10713 DAG size of output: 6436 [2021-04-15 02:34:21,971 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 11841 DAG size of output: 7247 [2021-04-15 02:34:23,773 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 11852 DAG size of output: 7262 [2021-04-15 02:34:25,563 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 11852 DAG size of output: 7262 [2021-04-15 02:34:27,472 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 11867 DAG size of output: 7277 [2021-04-15 02:34:28,655 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 7271 DAG size of output: 6874 [2021-04-15 02:34:30,824 WARN L205 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 6876 DAG size of output: 10248 [2021-04-15 02:34:32,492 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 6861 DAG size of output: 7667 [2021-04-15 02:34:33,014 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 3237 DAG size of output: 2344 [2021-04-15 02:34:33,399 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 2056 DAG size of output: 2047 [2021-04-15 02:34:33,863 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 2036 [2021-04-15 02:34:34,379 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 1898 DAG size of output: 1481 [2021-04-15 02:34:35,395 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 970 DAG size of output: 1105 [2021-04-15 02:34:37,518 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 500 [2021-04-15 02:34:37,712 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1227 DAG size of output: 741 [2021-04-15 02:34:37,898 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 1792 DAG size of output: 1036 [2021-04-15 02:34:38,112 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 1994 DAG size of output: 1121 [2021-04-15 02:34:38,337 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 2083 DAG size of output: 1082 [2021-04-15 02:34:38,632 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2408 DAG size of output: 1355 [2021-04-15 02:34:39,485 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 5449 DAG size of output: 3058 [2021-04-15 02:34:40,056 WARN L205 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 2758 DAG size of output: 2409 [2021-04-15 02:34:40,305 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1459 [2021-04-15 02:34:40,508 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1447 DAG size of output: 1419 [2021-04-15 02:34:40,649 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 963 DAG size of output: 961 [2021-04-15 02:34:42,192 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 616 [2021-04-15 02:34:42,310 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1663 DAG size of output: 563 [2021-04-15 02:34:42,538 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1382 [2021-04-15 02:34:42,757 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 1370 DAG size of output: 1369 [2021-04-15 02:34:43,076 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 1108 DAG size of output: 1114 [2021-04-15 02:34:43,229 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 788 [2021-04-15 02:34:44,845 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 729 [2021-04-15 02:34:45,064 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 912 [2021-04-15 02:34:46,824 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1327 DAG size of output: 855 [2021-04-15 02:34:47,113 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1259 [2021-04-15 02:34:47,895 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 2287 DAG size of output: 1503 [2021-04-15 02:34:48,421 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2414 DAG size of output: 1590 [2021-04-15 02:34:48,867 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 3775 DAG size of output: 1957 [2021-04-15 02:34:49,459 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 4108 DAG size of output: 2247 [2021-04-15 02:34:50,250 WARN L205 SmtUtils]: Spent 770.00 ms on a formula simplification. DAG size of input: 5923 DAG size of output: 3169 [2021-04-15 02:34:51,535 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 5545 DAG size of output: 5861 [2021-04-15 02:34:52,214 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 4769 DAG size of output: 2712 [2021-04-15 02:34:52,693 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 2453 DAG size of output: 2435 [2021-04-15 02:34:53,131 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 2424 DAG size of output: 2022 [2021-04-15 02:34:53,313 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 1196 [2021-04-15 02:34:53,679 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 983 DAG size of output: 983 [2021-04-15 02:34:55,978 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1355 DAG size of output: 843 [2021-04-15 02:34:56,160 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1602 DAG size of output: 1013 [2021-04-15 02:34:56,409 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 1321 DAG size of output: 1130 [2021-04-15 02:34:56,712 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 473 [2021-04-15 02:34:57,130 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 839 [2021-04-15 02:34:58,340 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 2819 DAG size of output: 1430 [2021-04-15 02:34:59,263 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 3088 DAG size of output: 1464 [2021-04-15 02:34:59,801 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 3371 DAG size of output: 1700 [2021-04-15 02:35:00,163 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 2343 DAG size of output: 1675 [2021-04-15 02:35:00,404 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1425 DAG size of output: 1418 [2021-04-15 02:35:00,636 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1409 DAG size of output: 1275 [2021-04-15 02:35:00,775 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 741 [2021-04-15 02:35:00,958 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 740 [2021-04-15 02:35:03,024 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 737 [2021-04-15 02:35:03,147 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1182 DAG size of output: 785 [2021-04-15 02:35:03,264 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 865 DAG size of output: 596 [2021-04-15 02:35:04,246 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1064 [2021-04-15 02:35:04,737 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1915 DAG size of output: 1066 [2021-04-15 02:35:05,033 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 2195 DAG size of output: 1308 [2021-04-15 02:35:05,634 WARN L205 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 4788 DAG size of output: 2444 [2021-04-15 02:35:07,066 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 9026 DAG size of output: 4498 [2021-04-15 02:35:08,463 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 9026 DAG size of output: 4498 [2021-04-15 02:35:10,369 WARN L205 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 9035 DAG size of output: 4170 [2021-04-15 02:35:10,856 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 2670 DAG size of output: 2159 [2021-04-15 02:35:12,319 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 2197 DAG size of output: 871 [2021-04-15 02:35:12,607 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 1265 [2021-04-15 02:35:14,808 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1631 DAG size of output: 806 [2021-04-15 02:35:15,203 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 3576 DAG size of output: 1470 [2021-04-15 02:35:15,556 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 3576 DAG size of output: 1470 [2021-04-15 02:35:15,921 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 3584 DAG size of output: 1478 [2021-04-15 02:35:16,139 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 1083 [2021-04-15 02:35:16,551 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 1130 [2021-04-15 02:35:16,676 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 963 [2021-04-15 02:35:18,767 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1881 DAG size of output: 733 [2021-04-15 02:35:18,893 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 802 [2021-04-15 02:35:19,021 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 802 [2021-04-15 02:35:19,205 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 2077 DAG size of output: 806 [2021-04-15 02:35:20,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-04-15 02:35:20,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:20,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-04-15 02:35:20,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-04-15 02:35:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:35:20,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 02:35:20,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-04-15 02:35:20,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997917844] [2021-04-15 02:35:20,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-04-15 02:35:20,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:35:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-04-15 02:35:20,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:20,151 INFO L87 Difference]: Start difference. First operand 14324 states and 46395 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:35:20,729 INFO L93 Difference]: Finished difference Result 14853 states and 47825 transitions. [2021-04-15 02:35:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 02:35:20,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-04-15 02:35:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:35:20,751 INFO L225 Difference]: With dead ends: 14853 [2021-04-15 02:35:20,752 INFO L226 Difference]: Without dead ends: 14850 [2021-04-15 02:35:20,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-04-15 02:35:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14850 states. [2021-04-15 02:35:20,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14850 to 14602. [2021-04-15 02:35:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14602 states, 14601 states have (on average 3.2490925279090472) internal successors, (47440), 14601 states have internal predecessors, (47440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 47440 transitions. [2021-04-15 02:35:20,966 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 47440 transitions. Word has length 24 [2021-04-15 02:35:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:35:20,966 INFO L480 AbstractCegarLoop]: Abstraction has 14602 states and 47440 transitions. [2021-04-15 02:35:20,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:35:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 47440 transitions. [2021-04-15 02:35:20,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-04-15 02:35:20,977 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:35:20,978 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:35:21,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74734 [2021-04-15 02:35:21,180 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:35:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:35:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash -168024840, now seen corresponding path program 238 times [2021-04-15 02:35:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:35:21,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514622172] [2021-04-15 02:35:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:35:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:35:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 02:35:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514622172] [2021-04-15 02:35:21,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105226463] [2021-04-15 02:35:21,277 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 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 [2021-04-15 02:35:21,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 02:35:21,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 02:35:21,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-04-15 02:35:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 02:35:21,954 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-04-15 02:35:21,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-04-15 02:35:21,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-04-15 02:35:23,247 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 382 [2021-04-15 02:35:26,038 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 887 [2021-04-15 02:35:26,188 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 930 [2021-04-15 02:35:26,567 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1223 DAG size of output: 1113 [2021-04-15 02:35:26,749 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1238 DAG size of output: 1123 [2021-04-15 02:35:27,840 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 882 DAG size of output: 615 [2021-04-15 02:35:28,945 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1334 DAG size of output: 900 [2021-04-15 02:35:29,074 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1348 DAG size of output: 903 [2021-04-15 02:35:31,313 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 894 [2021-04-15 02:35:31,570 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2141 DAG size of output: 1428 [2021-04-15 02:35:32,026 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 3034 DAG size of output: 2306 [2021-04-15 02:35:32,217 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 312 [2021-04-15 02:35:34,304 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1068 [2021-04-15 02:35:36,200 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 895 [2021-04-15 02:35:36,330 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1054 DAG size of output: 910 [2021-04-15 02:35:36,689 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 1846 DAG size of output: 1524 [2021-04-15 02:35:37,211 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 1737 [2021-04-15 02:35:37,545 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 2052 DAG size of output: 1747 [2021-04-15 02:35:40,099 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1246 DAG size of output: 1043 [2021-04-15 02:35:40,253 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1247 DAG size of output: 1044 [2021-04-15 02:35:40,423 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1414 DAG size of output: 1189 [2021-04-15 02:35:41,063 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 490 [2021-04-15 02:35:43,092 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 1409 [2021-04-15 02:35:43,533 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 2432 DAG size of output: 2089 [2021-04-15 02:35:43,922 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 2444 DAG size of output: 2089 [2021-04-15 02:35:44,640 WARN L205 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 4052 DAG size of output: 3368 [2021-04-15 02:35:45,842 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 6391 DAG size of output: 4999 [2021-04-15 02:35:47,096 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 6405 DAG size of output: 5013 [2021-04-15 02:35:49,031 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1551 DAG size of output: 1137 [2021-04-15 02:35:49,266 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 1564 DAG size of output: 1140 [2021-04-15 02:35:50,625 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 7776 DAG size of output: 5926 [2021-04-15 02:35:52,150 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 7920 DAG size of output: 6050 [2021-04-15 02:35:53,720 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 7957 DAG size of output: 6078 [2021-04-15 02:35:55,296 WARN L205 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 7957 DAG size of output: 6078 [2021-04-15 02:35:56,898 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 7966 DAG size of output: 6087 [2021-04-15 02:35:58,855 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 6089 DAG size of output: 7835 [2021-04-15 02:36:00,404 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 5941 DAG size of output: 6386 [2021-04-15 02:36:00,883 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 2927 DAG size of output: 2915 [2021-04-15 02:36:01,343 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 2886 DAG size of output: 2879 [2021-04-15 02:36:02,376 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 2796 [2021-04-15 02:36:02,728 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 2332 [2021-04-15 02:36:03,073 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 2320 [2021-04-15 02:36:03,273 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 1299 [2021-04-15 02:36:03,431 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 1076 [2021-04-15 02:36:03,563 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-04-15 02:36:03,680 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 891 DAG size of output: 890 [2021-04-15 02:36:04,073 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 509 [2021-04-15 02:36:07,433 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1504 DAG size of output: 1038 [2021-04-15 02:36:07,586 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1508 DAG size of output: 1044 [2021-04-15 02:36:07,761 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1226 [2021-04-15 02:36:07,954 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1515 DAG size of output: 1514 [2021-04-15 02:36:08,145 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1507 DAG size of output: 1507 [2021-04-15 02:36:10,078 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 930 DAG size of output: 895 [2021-04-15 02:36:10,339 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1310 DAG size of output: 1539 [2021-04-15 02:36:10,513 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 1306 [2021-04-15 02:36:11,804 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 939 DAG size of output: 1098 [2021-04-15 02:36:13,742 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 1483 [2021-04-15 02:36:13,969 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1486 [2021-04-15 02:36:14,394 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 3684 DAG size of output: 2496 [2021-04-15 02:36:14,856 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 3695 DAG size of output: 2506 [2021-04-15 02:36:15,389 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 4050 DAG size of output: 2602 [2021-04-15 02:36:15,913 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 4475 DAG size of output: 2654 [2021-04-15 02:36:16,709 WARN L205 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 4661 DAG size of output: 2691 [2021-04-15 02:36:17,525 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 8030 DAG size of output: 3623 [2021-04-15 02:36:18,826 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 10263 DAG size of output: 5733 [2021-04-15 02:36:20,050 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 10263 DAG size of output: 5733 [2021-04-15 02:36:21,374 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 10269 DAG size of output: 5739 Received shutdown request... [2021-04-15 02:36:22,266 WARN L205 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 5734 DAG size of output: 5584 [2021-04-15 02:36:22,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92693 [2021-04-15 02:36:22,489 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 02:36:22,492 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 02:36:22,492 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:36:22 BasicIcfg [2021-04-15 02:36:22,493 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:36:22,493 INFO L168 Benchmark]: Toolchain (without parser) took 856781.32 ms. Allocated memory was 360.7 MB in the beginning and 5.0 GB in the end (delta: 4.7 GB). Free memory was 341.2 MB in the beginning and 1.8 GB in the end (delta: -1.4 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. [2021-04-15 02:36:22,493 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 360.7 MB. Free memory was 342.4 MB in the beginning and 342.3 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:36:22,493 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.50 ms. Allocated memory is still 360.7 MB. Free memory was 341.2 MB in the beginning and 339.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:36:22,493 INFO L168 Benchmark]: Boogie Preprocessor took 16.55 ms. Allocated memory is still 360.7 MB. Free memory was 339.7 MB in the beginning and 338.8 MB in the end (delta: 921.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:36:22,493 INFO L168 Benchmark]: RCFGBuilder took 407.42 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 322.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-04-15 02:36:22,493 INFO L168 Benchmark]: TraceAbstraction took 856326.31 ms. Allocated memory was 360.7 MB in the beginning and 5.0 GB in the end (delta: 4.7 GB). Free memory was 322.3 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. [2021-04-15 02:36:22,493 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 0.12 ms. Allocated memory is still 360.7 MB. Free memory was 342.4 MB in the beginning and 342.3 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.50 ms. Allocated memory is still 360.7 MB. Free memory was 341.2 MB in the beginning and 339.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.55 ms. Allocated memory is still 360.7 MB. Free memory was 339.7 MB in the beginning and 338.8 MB in the end (delta: 921.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 407.42 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 322.8 MB in the end (delta: 15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 856326.31 ms. Allocated memory was 360.7 MB in the beginning and 5.0 GB in the end (delta: 4.7 GB). Free memory was 322.3 MB in the beginning and 1.8 GB in the end (delta: -1.5 GB). Peak memory consumption was 3.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 57). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 856200.9ms, OverallIterations: 242, TraceHistogramMax: 12, EmptinessCheckTime: 1110.6ms, AutomataDifference: 40607.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 18.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4705 SDtfs, 17159 SDslu, 33944 SDs, 0 SdLazy, 35249 SolverSat, 5341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14012.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9103 GetRequests, 4250 SyntacticMatches, 109 SemanticMatches, 4744 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24084 ImplicationChecksByTransitivity, 30289.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14602occurred in iteration=241, InterpolantAutomatonStates: 4344, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20837.3ms AutomataMinimizationTime, 241 MinimizatonAttempts, 92334 StatesRemovedByMinimization, 235 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 768.1ms SsaConstructionTime, 2581.5ms SatisfiabilityAnalysisTime, 675885.6ms InterpolantComputationTime, 9195 NumberOfCodeBlocks, 9194 NumberOfCodeBlocksAsserted, 1022 NumberOfCheckSat, 8716 ConstructedInterpolants, 0 QuantifiedInterpolants, 40186 SizeOfPredicates, 159 NumberOfNonLiveVariables, 18388 ConjunctsInSsa, 3219 ConjunctsInUnsatCore, 479 InterpolantComputations, 3 PerfectInterpolantSequences, 7506/20182 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