/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/MirabelleConcurrentIncrement.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-01 17:06:43,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-01 17:06:43,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-01 17:06:44,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-01 17:06:44,060 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 [2021-06-01 17:06:44,100 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-01 17:06:44,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-01 17:06:44,101 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-01 17:06:44,101 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-01 17:06:44,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-01 17:06:44,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-01 17:06:44,103 INFO L138 SettingsManager]: * Use SBE=true [2021-06-01 17:06:44,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-01 17:06:44,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-01 17:06:44,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-01 17:06:44,104 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-01 17:06:44,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-01 17:06:44,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-01 17:06:44,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-01 17:06:44,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-01 17:06:44,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-01 17:06:44,106 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-01 17:06:44,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-01 17:06:44,107 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-01 17:06:44,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-01 17:06:44,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-01 17:06:44,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-01 17:06:44,417 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-01 17:06:44,418 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-01 17:06:44,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl [2021-06-01 17:06:44,419 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/MirabelleConcurrentIncrement.bpl' [2021-06-01 17:06:44,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-01 17:06:44,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-01 17:06:44,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-01 17:06:44,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-01 17:06:44,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-01 17:06:44,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-01 17:06:44,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-01 17:06:44,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-01 17:06:44,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-01 17:06:44,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/1) ... [2021-06-01 17:06:44,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-01 17:06:44,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-01 17:06:44,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-01 17:06:44,487 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-01 17:06:44,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (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 [2021-06-01 17:06:44,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-01 17:06:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-01 17:06:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-01 17:06:44,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T1 given in one single declaration [2021-06-01 17:06:44,565 INFO L130 BoogieDeclarations]: Found specification of procedure T1 [2021-06-01 17:06:44,565 INFO L138 BoogieDeclarations]: Found implementation of procedure T1 [2021-06-01 17:06:44,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure T2 given in one single declaration [2021-06-01 17:06:44,566 INFO L130 BoogieDeclarations]: Found specification of procedure T2 [2021-06-01 17:06:44,566 INFO L138 BoogieDeclarations]: Found implementation of procedure T2 [2021-06-01 17:06:44,567 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-01 17:06:44,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-01 17:06:44,716 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-01 17:06:44,718 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 05:06:44 BoogieIcfgContainer [2021-06-01 17:06:44,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-01 17:06:44,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-01 17:06:44,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-01 17:06:44,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-01 17:06:44,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.06 05:06:44" (1/2) ... [2021-06-01 17:06:44,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@692425f3 and model type MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.06 05:06:44, skipping insertion in model container [2021-06-01 17:06:44,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.06 05:06:44" (2/2) ... [2021-06-01 17:06:44,726 INFO L111 eAbstractionObserver]: Analyzing ICFG MirabelleConcurrentIncrement.bpl [2021-06-01 17:06:44,733 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-01 17:06:44,734 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-01 17:06:44,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-01 17:06:44,735 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-01 17:06:44,797 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-01 17:06:44,811 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-01 17:06:44,826 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-01 17:06:44,826 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-01 17:06:44,826 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-01 17:06:44,826 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-01 17:06:44,826 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-01 17:06:44,827 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-01 17:06:44,827 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-01 17:06:44,827 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-01 17:06:44,834 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 62 flow [2021-06-01 17:06:44,844 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:44,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-01 17:06:44,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:44,851 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:44,851 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:44,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1474916704, now seen corresponding path program 1 times [2021-06-01 17:06:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:44,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97275723] [2021-06-01 17:06:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:44,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:44,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97275723] [2021-06-01 17:06:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97275723] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:06:44,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 17:06:44,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-01 17:06:44,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614434851] [2021-06-01 17:06:44,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-01 17:06:44,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-01 17:06:44,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 17:06:44,987 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.96875) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-06-01 17:06:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:45,020 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-01 17:06:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-01 17:06:45,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2021-06-01 17:06:45,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:45,029 INFO L225 Difference]: With dead ends: 63 [2021-06-01 17:06:45,029 INFO L226 Difference]: Without dead ends: 52 [2021-06-01 17:06:45,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-01 17:06:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-01 17:06:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-06-01 17:06:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-01 17:06:45,060 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 10 [2021-06-01 17:06:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:45,060 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-01 17:06:45,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-06-01 17:06:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-01 17:06:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-01 17:06:45,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:45,062 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:45,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-01 17:06:45,062 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:45,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:45,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2103181474, now seen corresponding path program 1 times [2021-06-01 17:06:45,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:45,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140874827] [2021-06-01 17:06:45,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:45,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:45,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140874827] [2021-06-01 17:06:45,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140874827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:45,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288514326] [2021-06-01 17:06:45,113 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 [2021-06-01 17:06:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:45,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-01 17:06:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:45,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288514326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:45,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:45,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-01 17:06:45,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432535569] [2021-06-01 17:06:45,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:45,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:45,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:45,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:45,278 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-01 17:06:45,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:45,349 INFO L93 Difference]: Finished difference Result 78 states and 145 transitions. [2021-06-01 17:06:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 17:06:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 12 [2021-06-01 17:06:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:45,351 INFO L225 Difference]: With dead ends: 78 [2021-06-01 17:06:45,352 INFO L226 Difference]: Without dead ends: 78 [2021-06-01 17:06:45,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-01 17:06:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-06-01 17:06:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-01 17:06:45,361 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-01 17:06:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:45,362 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-01 17:06:45,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-06-01 17:06:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-01 17:06:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-01 17:06:45,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:45,363 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:45,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-01 17:06:45,573 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash -85551518, now seen corresponding path program 1 times [2021-06-01 17:06:45,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:45,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75982043] [2021-06-01 17:06:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:45,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:45,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75982043] [2021-06-01 17:06:45,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75982043] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:06:45,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 17:06:45,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-01 17:06:45,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771338336] [2021-06-01 17:06:45,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 17:06:45,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 17:06:45,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:06:45,628 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:45,669 INFO L93 Difference]: Finished difference Result 51 states and 93 transitions. [2021-06-01 17:06:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 17:06:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-01 17:06:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:45,672 INFO L225 Difference]: With dead ends: 51 [2021-06-01 17:06:45,672 INFO L226 Difference]: Without dead ends: 43 [2021-06-01 17:06:45,673 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:06:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-01 17:06:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-06-01 17:06:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-01 17:06:45,678 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 12 [2021-06-01 17:06:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:45,678 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-01 17:06:45,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-01 17:06:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-01 17:06:45,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:45,679 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:45,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-01 17:06:45,679 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:45,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1933209310, now seen corresponding path program 2 times [2021-06-01 17:06:45,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:45,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168104234] [2021-06-01 17:06:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:45,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:45,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168104234] [2021-06-01 17:06:45,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168104234] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:06:45,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 17:06:45,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-01 17:06:45,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707153420] [2021-06-01 17:06:45,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 17:06:45,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 17:06:45,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:06:45,739 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:45,763 INFO L93 Difference]: Finished difference Result 48 states and 93 transitions. [2021-06-01 17:06:45,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 17:06:45,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-01 17:06:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:45,764 INFO L225 Difference]: With dead ends: 48 [2021-06-01 17:06:45,764 INFO L226 Difference]: Without dead ends: 48 [2021-06-01 17:06:45,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:06:45,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-01 17:06:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-06-01 17:06:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 85 transitions. [2021-06-01 17:06:45,770 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 85 transitions. Word has length 12 [2021-06-01 17:06:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:45,770 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 85 transitions. [2021-06-01 17:06:45,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 85 transitions. [2021-06-01 17:06:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-01 17:06:45,771 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:45,771 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:45,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-01 17:06:45,772 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1742393248, now seen corresponding path program 1 times [2021-06-01 17:06:45,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:45,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541744204] [2021-06-01 17:06:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:45,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:45,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541744204] [2021-06-01 17:06:45,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541744204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:45,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712462925] [2021-06-01 17:06:45,856 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:45,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712462925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:45,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:45,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-06-01 17:06:45,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847242818] [2021-06-01 17:06:45,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 17:06:45,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 17:06:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:06:45,975 INFO L87 Difference]: Start difference. First operand 44 states and 85 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-06-01 17:06:46,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:46,044 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-01 17:06:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 17:06:46,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2021-06-01 17:06:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:46,046 INFO L225 Difference]: With dead ends: 107 [2021-06-01 17:06:46,046 INFO L226 Difference]: Without dead ends: 98 [2021-06-01 17:06:46,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:06:46,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-01 17:06:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-06-01 17:06:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 146 transitions. [2021-06-01 17:06:46,061 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 146 transitions. Word has length 14 [2021-06-01 17:06:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:46,062 INFO L482 AbstractCegarLoop]: Abstraction has 70 states and 146 transitions. [2021-06-01 17:06:46,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-06-01 17:06:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 146 transitions. [2021-06-01 17:06:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-01 17:06:46,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:46,067 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:46,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:46,273 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:46,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:46,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1371911392, now seen corresponding path program 2 times [2021-06-01 17:06:46,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:46,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578544725] [2021-06-01 17:06:46,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:06:46,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:46,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578544725] [2021-06-01 17:06:46,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578544725] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:06:46,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-01 17:06:46,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-01 17:06:46,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907410080] [2021-06-01 17:06:46,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-01 17:06:46,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:46,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-01 17:06:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:06:46,337 INFO L87 Difference]: Start difference. First operand 70 states and 146 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-06-01 17:06:46,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:46,373 INFO L93 Difference]: Finished difference Result 127 states and 259 transitions. [2021-06-01 17:06:46,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-01 17:06:46,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2021-06-01 17:06:46,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:46,376 INFO L225 Difference]: With dead ends: 127 [2021-06-01 17:06:46,376 INFO L226 Difference]: Without dead ends: 118 [2021-06-01 17:06:46,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-01 17:06:46,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-01 17:06:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-06-01 17:06:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.191011235955056) internal successors, (195), 89 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 195 transitions. [2021-06-01 17:06:46,396 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 195 transitions. Word has length 14 [2021-06-01 17:06:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:46,396 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 195 transitions. [2021-06-01 17:06:46,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2021-06-01 17:06:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 195 transitions. [2021-06-01 17:06:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:46,397 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:46,397 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:46,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-01 17:06:46,398 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1755689310, now seen corresponding path program 3 times [2021-06-01 17:06:46,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:46,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721491304] [2021-06-01 17:06:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:46,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:46,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721491304] [2021-06-01 17:06:46,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721491304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:46,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002382391] [2021-06-01 17:06:46,430 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 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 [2021-06-01 17:06:46,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 17:06:46,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:46,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:46,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:46,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002382391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:46,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:46,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-01 17:06:46,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054299780] [2021-06-01 17:06:46,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:46,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:46,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:46,559 INFO L87 Difference]: Start difference. First operand 90 states and 195 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-06-01 17:06:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:46,664 INFO L93 Difference]: Finished difference Result 176 states and 345 transitions. [2021-06-01 17:06:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 17:06:46,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 16 [2021-06-01 17:06:46,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:46,666 INFO L225 Difference]: With dead ends: 176 [2021-06-01 17:06:46,666 INFO L226 Difference]: Without dead ends: 176 [2021-06-01 17:06:46,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:46,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-01 17:06:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 92. [2021-06-01 17:06:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.208791208791209) internal successors, (201), 91 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 201 transitions. [2021-06-01 17:06:46,691 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 201 transitions. Word has length 16 [2021-06-01 17:06:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:46,691 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 201 transitions. [2021-06-01 17:06:46,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-06-01 17:06:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 201 transitions. [2021-06-01 17:06:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:46,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:46,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:46,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:46,893 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:46,894 INFO L82 PathProgramCache]: Analyzing trace with hash -627140766, now seen corresponding path program 4 times [2021-06-01 17:06:46,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:46,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611621330] [2021-06-01 17:06:46,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:46,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:46,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611621330] [2021-06-01 17:06:46,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611621330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:46,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966712771] [2021-06-01 17:06:46,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:46,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 17:06:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:46,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:47,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966712771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:47,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:47,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-01 17:06:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955371315] [2021-06-01 17:06:47,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:47,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:47,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:47,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:47,038 INFO L87 Difference]: Start difference. First operand 92 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-06-01 17:06:47,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:47,124 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2021-06-01 17:06:47,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 17:06:47,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 16 [2021-06-01 17:06:47,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:47,126 INFO L225 Difference]: With dead ends: 161 [2021-06-01 17:06:47,126 INFO L226 Difference]: Without dead ends: 150 [2021-06-01 17:06:47,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 17:06:47,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-06-01 17:06:47,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 112. [2021-06-01 17:06:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1981981981981984) internal successors, (244), 111 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:47,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 244 transitions. [2021-06-01 17:06:47,132 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 244 transitions. Word has length 16 [2021-06-01 17:06:47,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:47,132 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 244 transitions. [2021-06-01 17:06:47,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-06-01 17:06:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 244 transitions. [2021-06-01 17:06:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:47,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:47,133 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:47,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:47,355 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2026275120, now seen corresponding path program 5 times [2021-06-01 17:06:47,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:47,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929415837] [2021-06-01 17:06:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:47,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:47,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:47,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929415837] [2021-06-01 17:06:47,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929415837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:47,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528053302] [2021-06-01 17:06:47,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:47,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 17:06:47,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:47,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:47,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528053302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:47,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:47,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 17:06:47,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470873580] [2021-06-01 17:06:47,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:47,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:47,474 INFO L87 Difference]: Start difference. First operand 112 states and 244 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-06-01 17:06:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:47,540 INFO L93 Difference]: Finished difference Result 154 states and 311 transitions. [2021-06-01 17:06:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 17:06:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 16 [2021-06-01 17:06:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:47,542 INFO L225 Difference]: With dead ends: 154 [2021-06-01 17:06:47,542 INFO L226 Difference]: Without dead ends: 154 [2021-06-01 17:06:47,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-01 17:06:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 110. [2021-06-01 17:06:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1743119266055047) internal successors, (237), 109 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 237 transitions. [2021-06-01 17:06:47,547 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 237 transitions. Word has length 16 [2021-06-01 17:06:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:47,547 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 237 transitions. [2021-06-01 17:06:47,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-06-01 17:06:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 237 transitions. [2021-06-01 17:06:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:47,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:47,548 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:47,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:47,771 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:47,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1537391890, now seen corresponding path program 6 times [2021-06-01 17:06:47,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:47,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225280542] [2021-06-01 17:06:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:47,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225280542] [2021-06-01 17:06:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225280542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860397652] [2021-06-01 17:06:47,810 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 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 [2021-06-01 17:06:47,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 17:06:47,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:47,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:47,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860397652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:47,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:47,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 17:06:47,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988509975] [2021-06-01 17:06:47,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:47,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:47,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:47,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:47,892 INFO L87 Difference]: Start difference. First operand 110 states and 237 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-06-01 17:06:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:47,954 INFO L93 Difference]: Finished difference Result 144 states and 290 transitions. [2021-06-01 17:06:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 17:06:47,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 16 [2021-06-01 17:06:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:47,956 INFO L225 Difference]: With dead ends: 144 [2021-06-01 17:06:47,956 INFO L226 Difference]: Without dead ends: 141 [2021-06-01 17:06:47,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:47,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-01 17:06:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-06-01 17:06:47,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-06-01 17:06:47,960 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 16 [2021-06-01 17:06:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:47,960 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-06-01 17:06:47,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2021-06-01 17:06:47,961 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-06-01 17:06:47,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:47,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:47,961 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:48,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:48,175 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:48,175 INFO L82 PathProgramCache]: Analyzing trace with hash 2099418526, now seen corresponding path program 7 times [2021-06-01 17:06:48,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:48,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120398417] [2021-06-01 17:06:48,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:48,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:48,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120398417] [2021-06-01 17:06:48,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120398417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:48,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731670977] [2021-06-01 17:06:48,220 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 17:06:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:48,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731670977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:48,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:48,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 17:06:48,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709083922] [2021-06-01 17:06:48,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:48,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:48,307 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:48,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:48,379 INFO L93 Difference]: Finished difference Result 195 states and 392 transitions. [2021-06-01 17:06:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 17:06:48,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-06-01 17:06:48,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:48,381 INFO L225 Difference]: With dead ends: 195 [2021-06-01 17:06:48,381 INFO L226 Difference]: Without dead ends: 195 [2021-06-01 17:06:48,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-01 17:06:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2021-06-01 17:06:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1983471074380163) internal successors, (266), 121 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 266 transitions. [2021-06-01 17:06:48,387 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 266 transitions. Word has length 16 [2021-06-01 17:06:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:48,387 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 266 transitions. [2021-06-01 17:06:48,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 266 transitions. [2021-06-01 17:06:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:48,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:48,402 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:48,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:48,625 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash -177918814, now seen corresponding path program 8 times [2021-06-01 17:06:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:48,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926976785] [2021-06-01 17:06:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:48,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:48,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926976785] [2021-06-01 17:06:48,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926976785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:48,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354652521] [2021-06-01 17:06:48,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 17:06:48,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 17:06:48,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:48,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:48,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354652521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:48,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:48,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 17:06:48,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995779594] [2021-06-01 17:06:48,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:48,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:48,715 INFO L87 Difference]: Start difference. First operand 122 states and 266 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:48,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:48,773 INFO L93 Difference]: Finished difference Result 177 states and 366 transitions. [2021-06-01 17:06:48,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 17:06:48,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-06-01 17:06:48,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:48,775 INFO L225 Difference]: With dead ends: 177 [2021-06-01 17:06:48,775 INFO L226 Difference]: Without dead ends: 174 [2021-06-01 17:06:48,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-01 17:06:48,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-06-01 17:06:48,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.251968503937008) internal successors, (286), 127 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 286 transitions. [2021-06-01 17:06:48,779 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 286 transitions. Word has length 16 [2021-06-01 17:06:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:48,780 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 286 transitions. [2021-06-01 17:06:48,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 286 transitions. [2021-06-01 17:06:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:48,780 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:48,780 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:49,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-01 17:06:49,003 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:49,004 INFO L82 PathProgramCache]: Analyzing trace with hash -523408140, now seen corresponding path program 9 times [2021-06-01 17:06:49,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:49,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307684303] [2021-06-01 17:06:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:49,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:49,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307684303] [2021-06-01 17:06:49,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307684303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:49,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355075769] [2021-06-01 17:06:49,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:49,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 17:06:49,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:49,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:49,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:49,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355075769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:49,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:49,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 17:06:49,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077651387] [2021-06-01 17:06:49,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:49,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:49,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:49,083 INFO L87 Difference]: Start difference. First operand 128 states and 286 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:49,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:49,142 INFO L93 Difference]: Finished difference Result 184 states and 383 transitions. [2021-06-01 17:06:49,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 17:06:49,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-06-01 17:06:49,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:49,143 INFO L225 Difference]: With dead ends: 184 [2021-06-01 17:06:49,144 INFO L226 Difference]: Without dead ends: 184 [2021-06-01 17:06:49,144 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-06-01 17:06:49,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 130. [2021-06-01 17:06:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.248062015503876) internal successors, (290), 129 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 290 transitions. [2021-06-01 17:06:49,148 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 290 transitions. Word has length 16 [2021-06-01 17:06:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:49,149 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 290 transitions. [2021-06-01 17:06:49,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 290 transitions. [2021-06-01 17:06:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:49,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:49,149 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:49,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:49,372 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1012291370, now seen corresponding path program 10 times [2021-06-01 17:06:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:49,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90239724] [2021-06-01 17:06:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:49,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90239724] [2021-06-01 17:06:49,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90239724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865332688] [2021-06-01 17:06:49,406 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 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 [2021-06-01 17:06:49,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 17:06:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865332688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:49,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:49,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-01 17:06:49,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237044476] [2021-06-01 17:06:49,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:49,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:49,463 INFO L87 Difference]: Start difference. First operand 130 states and 290 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:49,520 INFO L93 Difference]: Finished difference Result 192 states and 395 transitions. [2021-06-01 17:06:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-01 17:06:49,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 16 [2021-06-01 17:06:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:49,522 INFO L225 Difference]: With dead ends: 192 [2021-06-01 17:06:49,522 INFO L226 Difference]: Without dead ends: 189 [2021-06-01 17:06:49,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-06-01 17:06:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 130. [2021-06-01 17:06:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.24031007751938) internal successors, (289), 129 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 289 transitions. [2021-06-01 17:06:49,526 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 289 transitions. Word has length 16 [2021-06-01 17:06:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:49,527 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 289 transitions. [2021-06-01 17:06:49,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-06-01 17:06:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 289 transitions. [2021-06-01 17:06:49,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:49,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:49,527 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:49,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:49,737 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1596493520, now seen corresponding path program 11 times [2021-06-01 17:06:49,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:49,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305128458] [2021-06-01 17:06:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:49,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305128458] [2021-06-01 17:06:49,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305128458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:49,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819345850] [2021-06-01 17:06:49,762 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:49,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-01 17:06:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:49,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:49,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:49,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819345850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:49,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:49,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-01 17:06:49,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995481014] [2021-06-01 17:06:49,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:49,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:49,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:49,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:49,831 INFO L87 Difference]: Start difference. First operand 130 states and 289 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-06-01 17:06:49,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:49,915 INFO L93 Difference]: Finished difference Result 173 states and 357 transitions. [2021-06-01 17:06:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 17:06:49,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 16 [2021-06-01 17:06:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:49,917 INFO L225 Difference]: With dead ends: 173 [2021-06-01 17:06:49,917 INFO L226 Difference]: Without dead ends: 173 [2021-06-01 17:06:49,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-01 17:06:49,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-06-01 17:06:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.208) internal successors, (276), 125 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:49,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 276 transitions. [2021-06-01 17:06:49,921 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 276 transitions. Word has length 16 [2021-06-01 17:06:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:49,921 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 276 transitions. [2021-06-01 17:06:49,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-06-01 17:06:49,922 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 276 transitions. [2021-06-01 17:06:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-01 17:06:49,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:49,922 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:50,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-01 17:06:50,144 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash -474435792, now seen corresponding path program 12 times [2021-06-01 17:06:50,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:50,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620962884] [2021-06-01 17:06:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:50,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620962884] [2021-06-01 17:06:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620962884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133784660] [2021-06-01 17:06:50,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 17:06:50,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-01 17:06:50,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:50,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-01 17:06:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133784660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:50,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-01 17:06:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528821456] [2021-06-01 17:06:50,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:50,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:50,227 INFO L87 Difference]: Start difference. First operand 126 states and 276 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-06-01 17:06:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:50,307 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-06-01 17:06:50,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 17:06:50,307 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 16 [2021-06-01 17:06:50,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:50,309 INFO L225 Difference]: With dead ends: 188 [2021-06-01 17:06:50,309 INFO L226 Difference]: Without dead ends: 179 [2021-06-01 17:06:50,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 17:06:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-06-01 17:06:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2021-06-01 17:06:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2021-06-01 17:06:50,313 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 16 [2021-06-01 17:06:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:50,314 INFO L482 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2021-06-01 17:06:50,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-06-01 17:06:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2021-06-01 17:06:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 17:06:50,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:50,314 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:50,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-01 17:06:50,529 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash -734527072, now seen corresponding path program 13 times [2021-06-01 17:06:50,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:50,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5029627] [2021-06-01 17:06:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:50,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:50,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5029627] [2021-06-01 17:06:50,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5029627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:50,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766190500] [2021-06-01 17:06:50,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 17:06:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:50,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 17:06:50,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766190500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:50,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:50,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-01 17:06:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906555888] [2021-06-01 17:06:50,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 17:06:50,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:50,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 17:06:50,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:06:50,654 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-06-01 17:06:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:50,697 INFO L93 Difference]: Finished difference Result 239 states and 502 transitions. [2021-06-01 17:06:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 17:06:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2021-06-01 17:06:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:50,698 INFO L225 Difference]: With dead ends: 239 [2021-06-01 17:06:50,699 INFO L226 Difference]: Without dead ends: 230 [2021-06-01 17:06:50,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:06:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-01 17:06:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 177. [2021-06-01 17:06:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-01 17:06:50,704 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 18 [2021-06-01 17:06:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:50,704 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-01 17:06:50,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-06-01 17:06:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-01 17:06:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 17:06:50,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:50,705 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:50,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-01 17:06:50,927 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:50,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:50,927 INFO L82 PathProgramCache]: Analyzing trace with hash -655786976, now seen corresponding path program 14 times [2021-06-01 17:06:50,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:50,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956472744] [2021-06-01 17:06:50,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:06:50,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:50,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956472744] [2021-06-01 17:06:50,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956472744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:50,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187683028] [2021-06-01 17:06:50,975 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:50,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 17:06:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:50,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-01 17:06:50,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:51,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187683028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:51,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:51,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6] total 7 [2021-06-01 17:06:51,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458212973] [2021-06-01 17:06:51,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 17:06:51,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:51,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 17:06:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:51,119 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:51,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:51,231 INFO L93 Difference]: Finished difference Result 343 states and 728 transitions. [2021-06-01 17:06:51,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-01 17:06:51,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:51,233 INFO L225 Difference]: With dead ends: 343 [2021-06-01 17:06:51,233 INFO L226 Difference]: Without dead ends: 325 [2021-06-01 17:06:51,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-01 17:06:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-01 17:06:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 219. [2021-06-01 17:06:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.311926605504587) internal successors, (504), 218 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 504 transitions. [2021-06-01 17:06:51,240 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 504 transitions. Word has length 18 [2021-06-01 17:06:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:51,240 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 504 transitions. [2021-06-01 17:06:51,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 504 transitions. [2021-06-01 17:06:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-01 17:06:51,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:51,241 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:51,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:51,449 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:51,449 INFO L82 PathProgramCache]: Analyzing trace with hash -779503072, now seen corresponding path program 15 times [2021-06-01 17:06:51,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:51,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443342753] [2021-06-01 17:06:51,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:51,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:06:51,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:51,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443342753] [2021-06-01 17:06:51,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443342753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:51,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532909600] [2021-06-01 17:06:51,490 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 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 [2021-06-01 17:06:51,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 17:06:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 17:06:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:06:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532909600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:51,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:51,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-01 17:06:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128187608] [2021-06-01 17:06:51,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-01 17:06:51,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:51,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-01 17:06:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:06:51,546 INFO L87 Difference]: Start difference. First operand 219 states and 504 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-06-01 17:06:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:51,590 INFO L93 Difference]: Finished difference Result 322 states and 711 transitions. [2021-06-01 17:06:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-01 17:06:51,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 18 [2021-06-01 17:06:51,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:51,592 INFO L225 Difference]: With dead ends: 322 [2021-06-01 17:06:51,593 INFO L226 Difference]: Without dead ends: 313 [2021-06-01 17:06:51,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-01 17:06:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-01 17:06:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 257. [2021-06-01 17:06:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.3359375) internal successors, (598), 256 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 598 transitions. [2021-06-01 17:06:51,601 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 598 transitions. Word has length 18 [2021-06-01 17:06:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:51,601 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 598 transitions. [2021-06-01 17:06:51,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-06-01 17:06:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 598 transitions. [2021-06-01 17:06:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:51,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:51,602 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:51,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:51,813 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash -853552034, now seen corresponding path program 16 times [2021-06-01 17:06:51,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:51,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086720477] [2021-06-01 17:06:51,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:51,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:51,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086720477] [2021-06-01 17:06:51,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086720477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:51,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318268014] [2021-06-01 17:06:51,859 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 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 [2021-06-01 17:06:51,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 17:06:51,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:51,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:51,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:51,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318268014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:51,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:51,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-01 17:06:51,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472090384] [2021-06-01 17:06:51,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 17:06:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 17:06:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:51,943 INFO L87 Difference]: Start difference. First operand 257 states and 598 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:52,065 INFO L93 Difference]: Finished difference Result 402 states and 849 transitions. [2021-06-01 17:06:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:52,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:52,067 INFO L225 Difference]: With dead ends: 402 [2021-06-01 17:06:52,067 INFO L226 Difference]: Without dead ends: 402 [2021-06-01 17:06:52,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-01 17:06:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-01 17:06:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 241. [2021-06-01 17:06:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.325) internal successors, (558), 240 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 558 transitions. [2021-06-01 17:06:52,074 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 558 transitions. Word has length 20 [2021-06-01 17:06:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:52,074 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 558 transitions. [2021-06-01 17:06:52,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 558 transitions. [2021-06-01 17:06:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:52,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:52,075 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:52,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:52,289 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1535686302, now seen corresponding path program 17 times [2021-06-01 17:06:52,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:52,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870807048] [2021-06-01 17:06:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:52,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870807048] [2021-06-01 17:06:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870807048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:52,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594498759] [2021-06-01 17:06:52,324 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 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 [2021-06-01 17:06:52,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 17:06:52,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:52,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:52,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594498759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:52,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:52,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-01 17:06:52,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365546760] [2021-06-01 17:06:52,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 17:06:52,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 17:06:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:52,401 INFO L87 Difference]: Start difference. First operand 241 states and 558 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:52,509 INFO L93 Difference]: Finished difference Result 375 states and 801 transitions. [2021-06-01 17:06:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:52,511 INFO L225 Difference]: With dead ends: 375 [2021-06-01 17:06:52,511 INFO L226 Difference]: Without dead ends: 358 [2021-06-01 17:06:52,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-01 17:06:52,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-01 17:06:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 268. [2021-06-01 17:06:52,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.3071161048689137) internal successors, (616), 267 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 616 transitions. [2021-06-01 17:06:52,518 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 616 transitions. Word has length 20 [2021-06-01 17:06:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:52,518 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 616 transitions. [2021-06-01 17:06:52,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 616 transitions. [2021-06-01 17:06:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:52,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:52,519 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:52,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-01 17:06:52,733 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1142582700, now seen corresponding path program 18 times [2021-06-01 17:06:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:52,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075223907] [2021-06-01 17:06:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:52,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:52,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075223907] [2021-06-01 17:06:52,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075223907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:52,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177383419] [2021-06-01 17:06:52,760 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 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 [2021-06-01 17:06:52,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 17:06:52,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:52,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:52,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:52,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177383419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:52,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:52,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:52,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663920918] [2021-06-01 17:06:52,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:52,844 INFO L87 Difference]: Start difference. First operand 268 states and 616 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:52,926 INFO L93 Difference]: Finished difference Result 358 states and 767 transitions. [2021-06-01 17:06:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:52,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:52,928 INFO L225 Difference]: With dead ends: 358 [2021-06-01 17:06:52,928 INFO L226 Difference]: Without dead ends: 358 [2021-06-01 17:06:52,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-01 17:06:52,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 250. [2021-06-01 17:06:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.2610441767068274) internal successors, (563), 249 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 563 transitions. [2021-06-01 17:06:52,934 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 563 transitions. Word has length 20 [2021-06-01 17:06:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:52,934 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 563 transitions. [2021-06-01 17:06:52,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 563 transitions. [2021-06-01 17:06:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:52,935 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:52,935 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:53,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-01 17:06:53,158 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash 653699470, now seen corresponding path program 19 times [2021-06-01 17:06:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:53,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993374945] [2021-06-01 17:06:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:53,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993374945] [2021-06-01 17:06:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993374945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975012493] [2021-06-01 17:06:53,197 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-01 17:06:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:53,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975012493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:53,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:53,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96704257] [2021-06-01 17:06:53,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:53,268 INFO L87 Difference]: Start difference. First operand 250 states and 563 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:53,349 INFO L93 Difference]: Finished difference Result 305 states and 654 transitions. [2021-06-01 17:06:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 17:06:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:53,351 INFO L225 Difference]: With dead ends: 305 [2021-06-01 17:06:53,351 INFO L226 Difference]: Without dead ends: 302 [2021-06-01 17:06:53,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-01 17:06:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-06-01 17:06:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 250. [2021-06-01 17:06:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.2570281124497993) internal successors, (562), 249 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) [2021-06-01 17:06:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 562 transitions. [2021-06-01 17:06:53,357 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 562 transitions. Word has length 20 [2021-06-01 17:06:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:53,357 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 562 transitions. [2021-06-01 17:06:53,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 562 transitions. [2021-06-01 17:06:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:53,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:53,358 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:53,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-01 17:06:53,577 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash -898528034, now seen corresponding path program 20 times [2021-06-01 17:06:53,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:53,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844139752] [2021-06-01 17:06:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:53,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844139752] [2021-06-01 17:06:53,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844139752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:53,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732429018] [2021-06-01 17:06:53,609 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 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 [2021-06-01 17:06:53,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 17:06:53,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:53,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732429018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:53,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:53,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:53,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738591458] [2021-06-01 17:06:53,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:53,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:53,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:53,692 INFO L87 Difference]: Start difference. First operand 250 states and 562 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:53,774 INFO L93 Difference]: Finished difference Result 417 states and 879 transitions. [2021-06-01 17:06:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:53,776 INFO L225 Difference]: With dead ends: 417 [2021-06-01 17:06:53,776 INFO L226 Difference]: Without dead ends: 417 [2021-06-01 17:06:53,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-01 17:06:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 268. [2021-06-01 17:06:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.2883895131086143) internal successors, (611), 267 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:53,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 611 transitions. [2021-06-01 17:06:53,784 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 611 transitions. Word has length 20 [2021-06-01 17:06:53,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:53,784 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 611 transitions. [2021-06-01 17:06:53,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:53,784 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 611 transitions. [2021-06-01 17:06:53,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:53,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:53,785 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:54,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-01 17:06:54,001 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1119101922, now seen corresponding path program 21 times [2021-06-01 17:06:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:54,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725509676] [2021-06-01 17:06:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:54,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725509676] [2021-06-01 17:06:54,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725509676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:54,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749008744] [2021-06-01 17:06:54,028 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:54,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 17:06:54,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:54,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-01 17:06:54,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749008744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:54,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:54,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-01 17:06:54,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620522960] [2021-06-01 17:06:54,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-01 17:06:54,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-01 17:06:54,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-01 17:06:54,135 INFO L87 Difference]: Start difference. First operand 268 states and 611 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:54,441 INFO L93 Difference]: Finished difference Result 393 states and 847 transitions. [2021-06-01 17:06:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-01 17:06:54,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-01 17:06:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:54,442 INFO L225 Difference]: With dead ends: 393 [2021-06-01 17:06:54,443 INFO L226 Difference]: Without dead ends: 313 [2021-06-01 17:06:54,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-06-01 17:06:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-01 17:06:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 237. [2021-06-01 17:06:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.3220338983050848) internal successors, (548), 236 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) [2021-06-01 17:06:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 548 transitions. [2021-06-01 17:06:54,455 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 548 transitions. Word has length 20 [2021-06-01 17:06:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:54,455 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 548 transitions. [2021-06-01 17:06:54,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 548 transitions. [2021-06-01 17:06:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:54,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:54,457 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:54,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-01 17:06:54,673 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:54,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:54,673 INFO L82 PathProgramCache]: Analyzing trace with hash 284729366, now seen corresponding path program 22 times [2021-06-01 17:06:54,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:54,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694117858] [2021-06-01 17:06:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:54,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:54,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694117858] [2021-06-01 17:06:54,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694117858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:54,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401637929] [2021-06-01 17:06:54,706 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 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 [2021-06-01 17:06:54,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 17:06:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:54,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401637929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:54,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:54,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:54,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487150001] [2021-06-01 17:06:54,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:54,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:54,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:54,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:54,785 INFO L87 Difference]: Start difference. First operand 237 states and 548 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:54,856 INFO L93 Difference]: Finished difference Result 329 states and 695 transitions. [2021-06-01 17:06:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 17:06:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:54,857 INFO L225 Difference]: With dead ends: 329 [2021-06-01 17:06:54,857 INFO L226 Difference]: Without dead ends: 323 [2021-06-01 17:06:54,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-01 17:06:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-01 17:06:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 211. [2021-06-01 17:06:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3047619047619046) internal successors, (484), 210 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 484 transitions. [2021-06-01 17:06:54,865 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 484 transitions. Word has length 20 [2021-06-01 17:06:54,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:54,865 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 484 transitions. [2021-06-01 17:06:54,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 484 transitions. [2021-06-01 17:06:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:54,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:54,866 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:55,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:55,087 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:55,087 INFO L82 PathProgramCache]: Analyzing trace with hash -299472784, now seen corresponding path program 23 times [2021-06-01 17:06:55,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:55,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065000275] [2021-06-01 17:06:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:55,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065000275] [2021-06-01 17:06:55,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065000275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597784169] [2021-06-01 17:06:55,119 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 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 [2021-06-01 17:06:55,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 17:06:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:55,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597784169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:55,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:55,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-01 17:06:55,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437206304] [2021-06-01 17:06:55,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:06:55,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:55,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:06:55,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:55,185 INFO L87 Difference]: Start difference. First operand 211 states and 484 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:55,284 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2021-06-01 17:06:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:55,286 INFO L225 Difference]: With dead ends: 303 [2021-06-01 17:06:55,286 INFO L226 Difference]: Without dead ends: 303 [2021-06-01 17:06:55,286 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-01 17:06:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-01 17:06:55,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 186. [2021-06-01 17:06:55,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-01 17:06:55,291 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-01 17:06:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:55,291 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-01 17:06:55,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-01 17:06:55,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:55,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:55,291 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:55,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-01 17:06:55,492 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:55,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash 822584944, now seen corresponding path program 24 times [2021-06-01 17:06:55,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:55,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534946042] [2021-06-01 17:06:55,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:55,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:55,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534946042] [2021-06-01 17:06:55,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534946042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:55,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519071807] [2021-06-01 17:06:55,522 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 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 [2021-06-01 17:06:55,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 17:06:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:55,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:55,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519071807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:55,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:55,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-01 17:06:55,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420831787] [2021-06-01 17:06:55,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:06:55,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:06:55,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:55,588 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:55,674 INFO L93 Difference]: Finished difference Result 257 states and 522 transitions. [2021-06-01 17:06:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:55,675 INFO L225 Difference]: With dead ends: 257 [2021-06-01 17:06:55,675 INFO L226 Difference]: Without dead ends: 248 [2021-06-01 17:06:55,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-01 17:06:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-01 17:06:55,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 189. [2021-06-01 17:06:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.228723404255319) internal successors, (419), 188 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 419 transitions. [2021-06-01 17:06:55,680 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 419 transitions. Word has length 20 [2021-06-01 17:06:55,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:55,680 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 419 transitions. [2021-06-01 17:06:55,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:55,680 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 419 transitions. [2021-06-01 17:06:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:55,680 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:55,680 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:55,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:55,897 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash 618096624, now seen corresponding path program 25 times [2021-06-01 17:06:55,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:55,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780638271] [2021-06-01 17:06:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:55,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780638271] [2021-06-01 17:06:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780638271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409067993] [2021-06-01 17:06:55,935 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 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 [2021-06-01 17:06:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:55,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:56,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409067993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:56,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:56,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-01 17:06:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578370768] [2021-06-01 17:06:56,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:06:56,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:56,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:06:56,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:56,006 INFO L87 Difference]: Start difference. First operand 189 states and 419 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:56,101 INFO L93 Difference]: Finished difference Result 233 states and 480 transitions. [2021-06-01 17:06:56,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:56,101 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:06:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:56,102 INFO L225 Difference]: With dead ends: 233 [2021-06-01 17:06:56,103 INFO L226 Difference]: Without dead ends: 224 [2021-06-01 17:06:56,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-01 17:06:56,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-01 17:06:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2021-06-01 17:06:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.2032085561497325) internal successors, (412), 187 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 412 transitions. [2021-06-01 17:06:56,108 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 412 transitions. Word has length 20 [2021-06-01 17:06:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:56,108 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 412 transitions. [2021-06-01 17:06:56,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 412 transitions. [2021-06-01 17:06:56,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:56,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:56,109 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:56,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-01 17:06:56,326 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash 469387998, now seen corresponding path program 26 times [2021-06-01 17:06:56,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:56,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534756062] [2021-06-01 17:06:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:56,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:56,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534756062] [2021-06-01 17:06:56,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534756062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:56,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630691773] [2021-06-01 17:06:56,355 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 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 [2021-06-01 17:06:56,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 17:06:56,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:56,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:56,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:56,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630691773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:56,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:56,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107540190] [2021-06-01 17:06:56,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:56,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:56,431 INFO L87 Difference]: Start difference. First operand 188 states and 412 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-06-01 17:06:56,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:56,496 INFO L93 Difference]: Finished difference Result 289 states and 591 transitions. [2021-06-01 17:06:56,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:56,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-06-01 17:06:56,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:56,497 INFO L225 Difference]: With dead ends: 289 [2021-06-01 17:06:56,497 INFO L226 Difference]: Without dead ends: 286 [2021-06-01 17:06:56,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-01 17:06:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-06-01 17:06:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.24) internal successors, (448), 200 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) [2021-06-01 17:06:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 448 transitions. [2021-06-01 17:06:56,501 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 448 transitions. Word has length 20 [2021-06-01 17:06:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:56,501 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 448 transitions. [2021-06-01 17:06:56,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-06-01 17:06:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 448 transitions. [2021-06-01 17:06:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:56,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:56,502 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:56,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:56,723 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:56,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2141528628, now seen corresponding path program 27 times [2021-06-01 17:06:56,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:56,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914330959] [2021-06-01 17:06:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:56,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:56,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914330959] [2021-06-01 17:06:56,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914330959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:56,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001580666] [2021-06-01 17:06:56,749 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 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 [2021-06-01 17:06:56,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 17:06:56,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:56,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001580666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:56,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:56,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:56,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670350982] [2021-06-01 17:06:56,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:56,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:56,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:56,814 INFO L87 Difference]: Start difference. First operand 201 states and 448 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-06-01 17:06:56,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:56,878 INFO L93 Difference]: Finished difference Result 308 states and 651 transitions. [2021-06-01 17:06:56,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:56,878 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-06-01 17:06:56,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:56,879 INFO L225 Difference]: With dead ends: 308 [2021-06-01 17:06:56,879 INFO L226 Difference]: Without dead ends: 308 [2021-06-01 17:06:56,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:56,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-01 17:06:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 218. [2021-06-01 17:06:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2764976958525347) internal successors, (494), 217 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 494 transitions. [2021-06-01 17:06:56,884 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 494 transitions. Word has length 20 [2021-06-01 17:06:56,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:56,884 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 494 transitions. [2021-06-01 17:06:56,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-06-01 17:06:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 494 transitions. [2021-06-01 17:06:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:56,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:56,885 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:57,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-01 17:06:57,107 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:57,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:57,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1652645398, now seen corresponding path program 28 times [2021-06-01 17:06:57,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:57,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763834508] [2021-06-01 17:06:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:57,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:57,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763834508] [2021-06-01 17:06:57,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763834508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:57,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653379823] [2021-06-01 17:06:57,134 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 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 [2021-06-01 17:06:57,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 17:06:57,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:57,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:57,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:57,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653379823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:57,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:57,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-01 17:06:57,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619248574] [2021-06-01 17:06:57,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-01 17:06:57,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:57,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-01 17:06:57,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-01 17:06:57,208 INFO L87 Difference]: Start difference. First operand 218 states and 494 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-06-01 17:06:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:57,273 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2021-06-01 17:06:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-01 17:06:57,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 20 [2021-06-01 17:06:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:57,274 INFO L225 Difference]: With dead ends: 302 [2021-06-01 17:06:57,274 INFO L226 Difference]: Without dead ends: 299 [2021-06-01 17:06:57,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-01 17:06:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-01 17:06:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 218. [2021-06-01 17:06:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.271889400921659) internal successors, (493), 217 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 493 transitions. [2021-06-01 17:06:57,281 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 493 transitions. Word has length 20 [2021-06-01 17:06:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:57,281 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 493 transitions. [2021-06-01 17:06:57,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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) [2021-06-01 17:06:57,281 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 493 transitions. [2021-06-01 17:06:57,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:57,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:57,281 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:57,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:57,485 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:57,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1068443248, now seen corresponding path program 29 times [2021-06-01 17:06:57,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:57,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767092617] [2021-06-01 17:06:57,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:57,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767092617] [2021-06-01 17:06:57,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767092617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:57,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092463462] [2021-06-01 17:06:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 17:06:57,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-01 17:06:57,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:57,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:57,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:57,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092463462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:57,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:57,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-01 17:06:57,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747138916] [2021-06-01 17:06:57,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:06:57,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:06:57,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:57,594 INFO L87 Difference]: Start difference. First operand 218 states and 493 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-06-01 17:06:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:57,713 INFO L93 Difference]: Finished difference Result 318 states and 670 transitions. [2021-06-01 17:06:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 20 [2021-06-01 17:06:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:57,714 INFO L225 Difference]: With dead ends: 318 [2021-06-01 17:06:57,714 INFO L226 Difference]: Without dead ends: 318 [2021-06-01 17:06:57,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-01 17:06:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-01 17:06:57,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-01 17:06:57,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.266968325791855) internal successors, (501), 221 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 501 transitions. [2021-06-01 17:06:57,720 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 501 transitions. Word has length 20 [2021-06-01 17:06:57,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:57,720 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 501 transitions. [2021-06-01 17:06:57,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-06-01 17:06:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 501 transitions. [2021-06-01 17:06:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:57,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:57,721 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:57,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-01 17:06:57,937 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2104466320, now seen corresponding path program 30 times [2021-06-01 17:06:57,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:57,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925864329] [2021-06-01 17:06:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:57,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:57,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:57,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925864329] [2021-06-01 17:06:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925864329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:57,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202903069] [2021-06-01 17:06:57,967 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 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 [2021-06-01 17:06:57,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-01 17:06:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:58,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202903069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:58,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:58,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-01 17:06:58,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918888939] [2021-06-01 17:06:58,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:06:58,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:58,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:06:58,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-01 17:06:58,029 INFO L87 Difference]: Start difference. First operand 222 states and 501 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-06-01 17:06:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:58,109 INFO L93 Difference]: Finished difference Result 327 states and 677 transitions. [2021-06-01 17:06:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 20 [2021-06-01 17:06:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:58,110 INFO L225 Difference]: With dead ends: 327 [2021-06-01 17:06:58,110 INFO L226 Difference]: Without dead ends: 318 [2021-06-01 17:06:58,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-01 17:06:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-01 17:06:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 222. [2021-06-01 17:06:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.257918552036199) internal successors, (499), 221 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 499 transitions. [2021-06-01 17:06:58,116 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 499 transitions. Word has length 20 [2021-06-01 17:06:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:58,116 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 499 transitions. [2021-06-01 17:06:58,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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) [2021-06-01 17:06:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 499 transitions. [2021-06-01 17:06:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:58,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:58,117 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:58,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:58,339 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1481240012, now seen corresponding path program 31 times [2021-06-01 17:06:58,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:58,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003464419] [2021-06-01 17:06:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:58,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:58,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003464419] [2021-06-01 17:06:58,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003464419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:58,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908973650] [2021-06-01 17:06:58,372 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 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 [2021-06-01 17:06:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908973650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:58,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:58,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-01 17:06:58,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80323625] [2021-06-01 17:06:58,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 17:06:58,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:58,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 17:06:58,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:58,429 INFO L87 Difference]: Start difference. First operand 222 states and 499 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-06-01 17:06:58,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:58,569 INFO L93 Difference]: Finished difference Result 300 states and 625 transitions. [2021-06-01 17:06:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:58,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 20 [2021-06-01 17:06:58,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:58,570 INFO L225 Difference]: With dead ends: 300 [2021-06-01 17:06:58,571 INFO L226 Difference]: Without dead ends: 297 [2021-06-01 17:06:58,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-01 17:06:58,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-01 17:06:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 206. [2021-06-01 17:06:58,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2536585365853656) internal successors, (462), 205 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 462 transitions. [2021-06-01 17:06:58,575 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 462 transitions. Word has length 20 [2021-06-01 17:06:58,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:58,575 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 462 transitions. [2021-06-01 17:06:58,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-06-01 17:06:58,575 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 462 transitions. [2021-06-01 17:06:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-01 17:06:58,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:58,575 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:58,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-01 17:06:58,789 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash -33586060, now seen corresponding path program 32 times [2021-06-01 17:06:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:58,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224578996] [2021-06-01 17:06:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:58,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:58,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224578996] [2021-06-01 17:06:58,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224578996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:58,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753568678] [2021-06-01 17:06:58,821 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:58,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 17:06:58,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:06:58,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753568678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:58,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:58,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-01 17:06:58,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610596428] [2021-06-01 17:06:58,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-01 17:06:58,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-01 17:06:58,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-01 17:06:58,880 INFO L87 Difference]: Start difference. First operand 206 states and 462 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-06-01 17:06:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:58,974 INFO L93 Difference]: Finished difference Result 296 states and 607 transitions. [2021-06-01 17:06:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-01 17:06:58,975 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 20 [2021-06-01 17:06:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:58,976 INFO L225 Difference]: With dead ends: 296 [2021-06-01 17:06:58,976 INFO L226 Difference]: Without dead ends: 281 [2021-06-01 17:06:58,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-01 17:06:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-01 17:06:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 212. [2021-06-01 17:06:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.241706161137441) internal successors, (473), 211 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:58,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 473 transitions. [2021-06-01 17:06:58,980 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 473 transitions. Word has length 20 [2021-06-01 17:06:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:58,980 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 473 transitions. [2021-06-01 17:06:58,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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) [2021-06-01 17:06:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 473 transitions. [2021-06-01 17:06:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 17:06:58,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:58,980 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:59,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-01 17:06:59,202 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1571256086, now seen corresponding path program 33 times [2021-06-01 17:06:59,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:59,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12920186] [2021-06-01 17:06:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:59,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:59,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12920186] [2021-06-01 17:06:59,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12920186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:59,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345196704] [2021-06-01 17:06:59,237 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 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 [2021-06-01 17:06:59,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-01 17:06:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:59,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:06:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-01 17:06:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345196704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:06:59,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 17:06:59,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-01 17:06:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792741450] [2021-06-01 17:06:59,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:06:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:06:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:06:59,340 INFO L87 Difference]: Start difference. First operand 212 states and 473 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) 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) [2021-06-01 17:06:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:59,426 INFO L93 Difference]: Finished difference Result 239 states and 520 transitions. [2021-06-01 17:06:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:06:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) 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 22 [2021-06-01 17:06:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:59,427 INFO L225 Difference]: With dead ends: 239 [2021-06-01 17:06:59,427 INFO L226 Difference]: Without dead ends: 224 [2021-06-01 17:06:59,427 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-01 17:06:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-06-01 17:06:59,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 209. [2021-06-01 17:06:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.1923076923076925) internal successors, (456), 208 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:59,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 456 transitions. [2021-06-01 17:06:59,430 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 456 transitions. Word has length 22 [2021-06-01 17:06:59,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:59,430 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 456 transitions. [2021-06-01 17:06:59,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) 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) [2021-06-01 17:06:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 456 transitions. [2021-06-01 17:06:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 17:06:59,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:59,431 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:06:59,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-01 17:06:59,641 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:06:59,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:06:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 792994068, now seen corresponding path program 34 times [2021-06-01 17:06:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:06:59,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421448996] [2021-06-01 17:06:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:06:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:06:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:59,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:06:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421448996] [2021-06-01 17:06:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421448996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453698320] [2021-06-01 17:06:59,676 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:06:59,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-01 17:06:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:06:59,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 17:06:59,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:06:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-01 17:06:59,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453698320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:06:59,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:06:59,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-01 17:06:59,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075553384] [2021-06-01 17:06:59,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:06:59,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:06:59,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:06:59,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:59,731 INFO L87 Difference]: Start difference. First operand 209 states and 456 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-06-01 17:06:59,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:06:59,799 INFO L93 Difference]: Finished difference Result 322 states and 668 transitions. [2021-06-01 17:06:59,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 17:06:59,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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 22 [2021-06-01 17:06:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:06:59,801 INFO L225 Difference]: With dead ends: 322 [2021-06-01 17:06:59,801 INFO L226 Difference]: Without dead ends: 310 [2021-06-01 17:06:59,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:06:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-01 17:06:59,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 244. [2021-06-01 17:06:59,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.2181069958847734) internal successors, (539), 243 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:06:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 539 transitions. [2021-06-01 17:06:59,805 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 539 transitions. Word has length 22 [2021-06-01 17:06:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:06:59,805 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 539 transitions. [2021-06-01 17:06:59,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-06-01 17:06:59,805 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 539 transitions. [2021-06-01 17:06:59,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 17:06:59,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:06:59,806 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:07:00,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-01 17:07:00,017 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:07:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:07:00,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1965218720, now seen corresponding path program 35 times [2021-06-01 17:07:00,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:07:00,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808554020] [2021-06-01 17:07:00,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:07:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:07:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:07:00,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:07:00,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808554020] [2021-06-01 17:07:00,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808554020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:00,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840735776] [2021-06-01 17:07:00,055 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 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 [2021-06-01 17:07:00,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-01 17:07:00,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:07:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 17:07:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:07:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:07:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840735776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:00,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:07:00,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-01 17:07:00,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371749608] [2021-06-01 17:07:00,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:07:00,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:07:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:07:00,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:07:00,131 INFO L87 Difference]: Start difference. First operand 244 states and 539 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-06-01 17:07:00,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:07:00,190 INFO L93 Difference]: Finished difference Result 375 states and 800 transitions. [2021-06-01 17:07:00,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 17:07:00,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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 22 [2021-06-01 17:07:00,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:07:00,192 INFO L225 Difference]: With dead ends: 375 [2021-06-01 17:07:00,192 INFO L226 Difference]: Without dead ends: 363 [2021-06-01 17:07:00,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:07:00,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-01 17:07:00,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 294. [2021-06-01 17:07:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.266211604095563) internal successors, (664), 293 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 664 transitions. [2021-06-01 17:07:00,197 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 664 transitions. Word has length 22 [2021-06-01 17:07:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:07:00,197 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 664 transitions. [2021-06-01 17:07:00,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-06-01 17:07:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 664 transitions. [2021-06-01 17:07:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 17:07:00,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:07:00,198 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:07:00,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-01 17:07:00,413 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:07:00,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:07:00,413 INFO L82 PathProgramCache]: Analyzing trace with hash 116908384, now seen corresponding path program 36 times [2021-06-01 17:07:00,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:07:00,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004453632] [2021-06-01 17:07:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:07:00,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:07:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:07:00,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:07:00,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004453632] [2021-06-01 17:07:00,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004453632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:00,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193018766] [2021-06-01 17:07:00,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-01 17:07:00,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-01 17:07:00,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:07:00,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:07:00,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:07:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-01 17:07:00,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193018766] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:07:00,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 17:07:00,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2021-06-01 17:07:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267600223] [2021-06-01 17:07:00,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:07:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:07:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:07:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-01 17:07:00,541 INFO L87 Difference]: Start difference. First operand 294 states and 664 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) 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) [2021-06-01 17:07:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:07:00,616 INFO L93 Difference]: Finished difference Result 320 states and 710 transitions. [2021-06-01 17:07:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:07:00,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) 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 22 [2021-06-01 17:07:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:07:00,617 INFO L225 Difference]: With dead ends: 320 [2021-06-01 17:07:00,617 INFO L226 Difference]: Without dead ends: 308 [2021-06-01 17:07:00,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-01 17:07:00,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-01 17:07:00,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 291. [2021-06-01 17:07:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.193103448275862) internal successors, (636), 290 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:00,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 636 transitions. [2021-06-01 17:07:00,622 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 636 transitions. Word has length 22 [2021-06-01 17:07:00,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:07:00,622 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 636 transitions. [2021-06-01 17:07:00,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) 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) [2021-06-01 17:07:00,622 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 636 transitions. [2021-06-01 17:07:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 17:07:00,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:07:00,623 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:07:00,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-01 17:07:00,837 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:07:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:07:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash -694299372, now seen corresponding path program 37 times [2021-06-01 17:07:00,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:07:00,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026053152] [2021-06-01 17:07:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:07:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:07:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:07:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:07:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026053152] [2021-06-01 17:07:00,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026053152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:00,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067002721] [2021-06-01 17:07:00,875 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:07:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:07:00,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-01 17:07:00,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:07:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:07:01,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067002721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:01,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:07:01,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-01 17:07:01,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789952054] [2021-06-01 17:07:01,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-01 17:07:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:07:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-01 17:07:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:07:01,007 INFO L87 Difference]: Start difference. First operand 291 states and 636 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-06-01 17:07:01,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:07:01,073 INFO L93 Difference]: Finished difference Result 425 states and 900 transitions. [2021-06-01 17:07:01,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-01 17:07:01,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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 22 [2021-06-01 17:07:01,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:07:01,075 INFO L225 Difference]: With dead ends: 425 [2021-06-01 17:07:01,075 INFO L226 Difference]: Without dead ends: 416 [2021-06-01 17:07:01,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-01 17:07:01,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-01 17:07:01,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 350. [2021-06-01 17:07:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.226361031518625) internal successors, (777), 349 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 777 transitions. [2021-06-01 17:07:01,080 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 777 transitions. Word has length 22 [2021-06-01 17:07:01,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:07:01,081 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 777 transitions. [2021-06-01 17:07:01,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 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) [2021-06-01 17:07:01,081 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 777 transitions. [2021-06-01 17:07:01,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-01 17:07:01,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:07:01,081 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:07:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-01 17:07:01,297 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:07:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:07:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1224912364, now seen corresponding path program 38 times [2021-06-01 17:07:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:07:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88252070] [2021-06-01 17:07:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:07:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:07:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-01 17:07:01,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:07:01,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88252070] [2021-06-01 17:07:01,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88252070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:01,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801229471] [2021-06-01 17:07:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:07:01,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-01 17:07:01,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:07:01,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-01 17:07:01,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:07:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:07:01,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801229471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:01,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-01 17:07:01,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 12 [2021-06-01 17:07:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769442944] [2021-06-01 17:07:01,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-01 17:07:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:07:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-01 17:07:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-01 17:07:01,483 INFO L87 Difference]: Start difference. First operand 350 states and 777 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:07:01,696 INFO L93 Difference]: Finished difference Result 623 states and 1302 transitions. [2021-06-01 17:07:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-01 17:07:01,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-06-01 17:07:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:07:01,698 INFO L225 Difference]: With dead ends: 623 [2021-06-01 17:07:01,698 INFO L226 Difference]: Without dead ends: 605 [2021-06-01 17:07:01,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-01 17:07:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-06-01 17:07:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 410. [2021-06-01 17:07:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.2665036674816625) internal successors, (927), 409 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 927 transitions. [2021-06-01 17:07:01,705 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 927 transitions. Word has length 22 [2021-06-01 17:07:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:07:01,705 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 927 transitions. [2021-06-01 17:07:01,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 927 transitions. [2021-06-01 17:07:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-01 17:07:01,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-01 17:07:01,706 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-01 17:07:01,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:07:01,925 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-01 17:07:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-01 17:07:01,925 INFO L82 PathProgramCache]: Analyzing trace with hash -972138362, now seen corresponding path program 39 times [2021-06-01 17:07:01,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-01 17:07:01,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332255961] [2021-06-01 17:07:01,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-01 17:07:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-01 17:07:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-01 17:07:01,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-01 17:07:01,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332255961] [2021-06-01 17:07:01,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332255961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-01 17:07:01,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433760180] [2021-06-01 17:07:01,965 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 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 [2021-06-01 17:07:01,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-01 17:07:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-01 17:07:01,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-01 17:07:01,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-01 17:07:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-06-01 17:07:02,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433760180] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-01 17:07:02,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-01 17:07:02,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-06-01 17:07:02,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808024248] [2021-06-01 17:07:02,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-01 17:07:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-01 17:07:02,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-01 17:07:02,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-01 17:07:02,083 INFO L87 Difference]: Start difference. First operand 410 states and 927 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) 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) [2021-06-01 17:07:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-01 17:07:02,178 INFO L93 Difference]: Finished difference Result 428 states and 965 transitions. [2021-06-01 17:07:02,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-01 17:07:02,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) 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 24 [2021-06-01 17:07:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-01 17:07:02,179 INFO L225 Difference]: With dead ends: 428 [2021-06-01 17:07:02,179 INFO L226 Difference]: Without dead ends: 0 [2021-06-01 17:07:02,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-01 17:07:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-01 17:07:02,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-01 17:07:02,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-01 17:07:02,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-01 17:07:02,179 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2021-06-01 17:07:02,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-01 17:07:02,180 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-01 17:07:02,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) 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) [2021-06-01 17:07:02,180 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-01 17:07:02,180 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-01 17:07:02,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-01 17:07:02,386 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-01 17:07:02,388 INFO L202 PluginConnector]: Adding new model MirabelleConcurrentIncrement.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.06 05:07:02 BasicIcfg [2021-06-01 17:07:02,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-01 17:07:02,389 INFO L168 Benchmark]: Toolchain (without parser) took 17939.62 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 337.5 MB in the beginning and 249.6 MB in the end (delta: 87.9 MB). Peak memory consumption was 161.7 MB. Max. memory is 16.0 GB. [2021-06-01 17:07:02,389 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory is still 338.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 17:07:02,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.65 ms. Allocated memory is still 358.6 MB. Free memory was 337.4 MB in the beginning and 336.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-01 17:07:02,389 INFO L168 Benchmark]: Boogie Preprocessor took 12.53 ms. Allocated memory is still 358.6 MB. Free memory was 336.0 MB in the beginning and 335.1 MB in the end (delta: 922.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-01 17:07:02,389 INFO L168 Benchmark]: RCFGBuilder took 231.27 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 325.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-01 17:07:02,389 INFO L168 Benchmark]: TraceAbstraction took 17667.86 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 325.1 MB in the beginning and 249.6 MB in the end (delta: 75.5 MB). Peak memory consumption was 149.1 MB. Max. memory is 16.0 GB. [2021-06-01 17:07:02,390 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 358.6 MB. Free memory is still 338.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.65 ms. Allocated memory is still 358.6 MB. Free memory was 337.4 MB in the beginning and 336.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.53 ms. Allocated memory is still 358.6 MB. Free memory was 336.0 MB in the beginning and 335.1 MB in the end (delta: 922.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 231.27 ms. Allocated memory is still 358.6 MB. Free memory was 335.0 MB in the beginning and 325.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 17667.86 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 325.1 MB in the beginning and 249.6 MB in the end (delta: 75.5 MB). Peak memory consumption was 149.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 24]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17561.2ms, OverallIterations: 43, TraceHistogramMax: 4, EmptinessCheckTime: 35.1ms, AutomataDifference: 3766.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 851 SDtfs, 2271 SDslu, 2535 SDs, 0 SdLazy, 3354 SolverSat, 500 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1836.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1102 GetRequests, 676 SyntacticMatches, 60 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2247.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=410occurred in iteration=42, InterpolantAutomatonStates: 408, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 271.2ms AutomataMinimizationTime, 43 MinimizatonAttempts, 2839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 79.1ms SsaConstructionTime, 303.6ms SatisfiabilityAnalysisTime, 3590.7ms InterpolantComputationTime, 1520 NumberOfCodeBlocks, 1510 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 1438 ConstructedInterpolants, 0 QuantifiedInterpolants, 5559 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1167 ConjunctsInSsa, 290 ConjunctsInUnsatCore, 82 InterpolantComputations, 7 PerfectInterpolantSequences, 371/866 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...