/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:40:54,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:40:54,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:40:54,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:40:54,138 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 [2021-07-09 18:40:54,164 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:40:54,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:40:54,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:40:54,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:40:54,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:40:54,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:40:54,167 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:40:54,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:40:54,167 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:40:54,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:40:54,168 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:40:54,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:40:54,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:40:54,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:40:54,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:40:54,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:40:54,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:40:54,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:40:54,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:40:54,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:40:54,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:40:54,170 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:40:54,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:40:54,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:40:54,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:40:54,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:40:54,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:40:54,440 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:40:54,441 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:40:54,442 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-07-09 18:40:54,442 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-07-09 18:40:54,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:40:54,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:40:54,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:40:54,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:40:54,460 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:40:54,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,477 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:40:54,478 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:40:54,478 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:40:54,478 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:40:54,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/1) ... [2021-07-09 18:40:54,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:40:54,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:40:54,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:40:54,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:40:54,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (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 [2021-07-09 18:40:54,562 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:40:54,562 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:40:54,562 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:40:54,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:40:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:40:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:40:54,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:40:54,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:40:54,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:40:54,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:40:54,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:40:54,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:40:54,565 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:40:54,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:40:54,722 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:40:54,737 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:40:54 BoogieIcfgContainer [2021-07-09 18:40:54,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:40:54,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:40:54,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:40:54,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:40:54,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:40:54" (1/2) ... [2021-07-09 18:40:54,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65453023 and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:40:54, skipping insertion in model container [2021-07-09 18:40:54,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:40:54" (2/2) ... [2021-07-09 18:40:54,742 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-07-09 18:40:54,746 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:40:54,746 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:40:54,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:40:54,746 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:40:54,769 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:40:54,784 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:40:54,796 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:40:54,796 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:40:54,796 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:40:54,796 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:40:54,797 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:40:54,797 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:40:54,797 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:40:54,797 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:40:54,803 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-07-09 18:40:54,824 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 115 states, 114 states have (on average 2.763157894736842) internal successors, (315), 114 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 115 states, 114 states have (on average 2.763157894736842) internal successors, (315), 114 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:40:54,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:54,833 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:54,833 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1178018128, now seen corresponding path program 1 times [2021-07-09 18:40:54,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:54,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115827564] [2021-07-09 18:40:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:54,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:54,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115827564] [2021-07-09 18:40:55,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115827564] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:55,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:55,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:40:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061297978] [2021-07-09 18:40:55,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:40:55,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:40:55,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:40:55,022 INFO L87 Difference]: Start difference. First operand has 115 states, 114 states have (on average 2.763157894736842) internal successors, (315), 114 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.2) 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) [2021-07-09 18:40:55,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:55,083 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-07-09 18:40:55,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:40:55,084 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) 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 21 [2021-07-09 18:40:55,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:55,101 INFO L225 Difference]: With dead ends: 410 [2021-07-09 18:40:55,101 INFO L226 Difference]: Without dead ends: 395 [2021-07-09 18:40:55,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:40:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-09 18:40:55,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-07-09 18:40:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-07-09 18:40:55,160 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-07-09 18:40:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:55,161 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-07-09 18:40:55,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) 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) [2021-07-09 18:40:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-07-09 18:40:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:55,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:55,162 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:55,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:40:55,163 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:55,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:55,163 INFO L82 PathProgramCache]: Analyzing trace with hash 435293552, now seen corresponding path program 1 times [2021-07-09 18:40:55,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:55,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23321037] [2021-07-09 18:40:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:55,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23321037] [2021-07-09 18:40:55,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23321037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718253457] [2021-07-09 18:40:55,271 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 [2021-07-09 18:40:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:55,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:40:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718253457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:55,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:40:55,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028931008] [2021-07-09 18:40:55,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:55,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:55,447 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:55,638 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-07-09 18:40:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:40:55,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:55,641 INFO L225 Difference]: With dead ends: 532 [2021-07-09 18:40:55,641 INFO L226 Difference]: Without dead ends: 532 [2021-07-09 18:40:55,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:40:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-07-09 18:40:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-07-09 18:40:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-07-09 18:40:55,652 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-07-09 18:40:55,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:55,652 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-07-09 18:40:55,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-07-09 18:40:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:55,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:55,654 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:55,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:40:55,871 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1894116080, now seen corresponding path program 2 times [2021-07-09 18:40:55,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:55,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728276899] [2021-07-09 18:40:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:55,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:55,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728276899] [2021-07-09 18:40:55,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728276899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:55,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479339753] [2021-07-09 18:40:55,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:55,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:55,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:55,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:40:55,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479339753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:56,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:56,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:40:56,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512463086] [2021-07-09 18:40:56,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:56,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:56,073 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:56,281 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-07-09 18:40:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:40:56,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:56,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:56,284 INFO L225 Difference]: With dead ends: 565 [2021-07-09 18:40:56,284 INFO L226 Difference]: Without dead ends: 565 [2021-07-09 18:40:56,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-09 18:40:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-07-09 18:40:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-07-09 18:40:56,292 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-07-09 18:40:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:56,292 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-07-09 18:40:56,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-07-09 18:40:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:56,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:56,293 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:56,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:56,511 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash -672666414, now seen corresponding path program 1 times [2021-07-09 18:40:56,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:56,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328119170] [2021-07-09 18:40:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:56,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328119170] [2021-07-09 18:40:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328119170] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:56,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:56,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:40:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131950293] [2021-07-09 18:40:56,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:40:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:40:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:40:56,552 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:56,609 INFO L93 Difference]: Finished difference Result 302 states and 837 transitions. [2021-07-09 18:40:56,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:40:56,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:56,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:56,625 INFO L225 Difference]: With dead ends: 302 [2021-07-09 18:40:56,625 INFO L226 Difference]: Without dead ends: 291 [2021-07-09 18:40:56,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:40:56,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-07-09 18:40:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 219. [2021-07-09 18:40:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.876146788990826) internal successors, (627), 218 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 627 transitions. [2021-07-09 18:40:56,632 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 627 transitions. Word has length 23 [2021-07-09 18:40:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:56,632 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 627 transitions. [2021-07-09 18:40:56,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 627 transitions. [2021-07-09 18:40:56,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:56,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:56,634 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:56,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:40:56,634 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:56,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1246032622, now seen corresponding path program 1 times [2021-07-09 18:40:56,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:56,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057349761] [2021-07-09 18:40:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:56,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057349761] [2021-07-09 18:40:56,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057349761] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:56,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:56,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:40:56,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515963930] [2021-07-09 18:40:56,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:40:56,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:56,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:40:56,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:40:56,663 INFO L87 Difference]: Start difference. First operand 219 states and 627 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:56,712 INFO L93 Difference]: Finished difference Result 341 states and 932 transitions. [2021-07-09 18:40:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:40:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:56,715 INFO L225 Difference]: With dead ends: 341 [2021-07-09 18:40:56,715 INFO L226 Difference]: Without dead ends: 328 [2021-07-09 18:40:56,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:40:56,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-07-09 18:40:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 249. [2021-07-09 18:40:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.879032258064516) internal successors, (714), 248 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 714 transitions. [2021-07-09 18:40:56,722 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 714 transitions. Word has length 23 [2021-07-09 18:40:56,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:56,722 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 714 transitions. [2021-07-09 18:40:56,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 714 transitions. [2021-07-09 18:40:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:56,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:56,724 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:56,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:40:56,724 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:56,724 INFO L82 PathProgramCache]: Analyzing trace with hash 730755178, now seen corresponding path program 2 times [2021-07-09 18:40:56,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:56,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454174987] [2021-07-09 18:40:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:56,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454174987] [2021-07-09 18:40:56,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454174987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:56,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732001928] [2021-07-09 18:40:56,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:56,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:40:56,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:56,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:40:56,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:56,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732001928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:56,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:56,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 18:40:56,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676013068] [2021-07-09 18:40:56,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:40:56,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:56,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:40:56,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:40:56,854 INFO L87 Difference]: Start difference. First operand 249 states and 714 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:56,900 INFO L93 Difference]: Finished difference Result 311 states and 872 transitions. [2021-07-09 18:40:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:40:56,901 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:56,902 INFO L225 Difference]: With dead ends: 311 [2021-07-09 18:40:56,902 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 18:40:56,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 18:40:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 231. [2021-07-09 18:40:56,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-07-09 18:40:56,907 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-07-09 18:40:56,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:56,908 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-07-09 18:40:56,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-07-09 18:40:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:56,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:56,908 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,125 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1327749482, now seen corresponding path program 3 times [2021-07-09 18:40:57,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207627569] [2021-07-09 18:40:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207627569] [2021-07-09 18:40:57,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207627569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397742143] [2021-07-09 18:40:57,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:40:57,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:40:57,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:40:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:40:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397742143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:57,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:57,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-07-09 18:40:57,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549228366] [2021-07-09 18:40:57,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:40:57,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:40:57,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:40:57,252 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,402 INFO L93 Difference]: Finished difference Result 520 states and 1433 transitions. [2021-07-09 18:40:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:40:57,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,405 INFO L225 Difference]: With dead ends: 520 [2021-07-09 18:40:57,405 INFO L226 Difference]: Without dead ends: 520 [2021-07-09 18:40:57,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:40:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-09 18:40:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 231. [2021-07-09 18:40:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-07-09 18:40:57,427 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-07-09 18:40:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,427 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-07-09 18:40:57,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-07-09 18:40:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:57,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,428 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:40:57,644 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1918692182, now seen corresponding path program 2 times [2021-07-09 18:40:57,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621129018] [2021-07-09 18:40:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621129018] [2021-07-09 18:40:57,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621129018] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:57,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:57,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:40:57,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153199256] [2021-07-09 18:40:57,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:40:57,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:40:57,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:40:57,671 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,702 INFO L93 Difference]: Finished difference Result 253 states and 731 transitions. [2021-07-09 18:40:57,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:40:57,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,703 INFO L225 Difference]: With dead ends: 253 [2021-07-09 18:40:57,703 INFO L226 Difference]: Without dead ends: 253 [2021-07-09 18:40:57,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:40:57,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-07-09 18:40:57,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 209. [2021-07-09 18:40:57,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.889423076923077) internal successors, (601), 208 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 601 transitions. [2021-07-09 18:40:57,708 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 601 transitions. Word has length 23 [2021-07-09 18:40:57,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,708 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 601 transitions. [2021-07-09 18:40:57,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 601 transitions. [2021-07-09 18:40:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:57,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,709 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 18:40:57,709 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1943824618, now seen corresponding path program 3 times [2021-07-09 18:40:57,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585041027] [2021-07-09 18:40:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585041027] [2021-07-09 18:40:57,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585041027] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:57,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:57,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:40:57,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328994589] [2021-07-09 18:40:57,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:40:57,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:40:57,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:40:57,738 INFO L87 Difference]: Start difference. First operand 209 states and 601 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,782 INFO L93 Difference]: Finished difference Result 240 states and 689 transitions. [2021-07-09 18:40:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:40:57,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:57,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,784 INFO L225 Difference]: With dead ends: 240 [2021-07-09 18:40:57,784 INFO L226 Difference]: Without dead ends: 240 [2021-07-09 18:40:57,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:40:57,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-07-09 18:40:57,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2021-07-09 18:40:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.8587570621468927) internal successors, (506), 177 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 506 transitions. [2021-07-09 18:40:57,788 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 506 transitions. Word has length 23 [2021-07-09 18:40:57,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,788 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 506 transitions. [2021-07-09 18:40:57,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,788 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 506 transitions. [2021-07-09 18:40:57,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:57,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 18:40:57,789 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2060210918, now seen corresponding path program 4 times [2021-07-09 18:40:57,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995361966] [2021-07-09 18:40:57,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995361966] [2021-07-09 18:40:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995361966] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:57,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:57,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:40:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348796763] [2021-07-09 18:40:57,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:40:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:40:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:40:57,816 INFO L87 Difference]: Start difference. First operand 178 states and 506 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,864 INFO L93 Difference]: Finished difference Result 255 states and 720 transitions. [2021-07-09 18:40:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:40:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,865 INFO L225 Difference]: With dead ends: 255 [2021-07-09 18:40:57,865 INFO L226 Difference]: Without dead ends: 251 [2021-07-09 18:40:57,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:40:57,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-07-09 18:40:57,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2021-07-09 18:40:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 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) [2021-07-09 18:40:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-07-09 18:40:57,869 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-07-09 18:40:57,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,869 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-07-09 18:40:57,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,869 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-07-09 18:40:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:57,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,870 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 18:40:57,870 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash -961400090, now seen corresponding path program 5 times [2021-07-09 18:40:57,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197062697] [2021-07-09 18:40:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197062697] [2021-07-09 18:40:57,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197062697] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:57,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:57,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:40:57,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860566656] [2021-07-09 18:40:57,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:40:57,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:40:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:40:57,894 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:57,963 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-07-09 18:40:57,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:40:57,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:57,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:57,964 INFO L225 Difference]: With dead ends: 331 [2021-07-09 18:40:57,965 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 18:40:57,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:40:57,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 18:40:57,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-07-09 18:40:57,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 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) [2021-07-09 18:40:57,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-07-09 18:40:57,969 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-07-09 18:40:57,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:57,970 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-07-09 18:40:57,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:57,970 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-07-09 18:40:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:40:57,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:57,970 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:57,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-09 18:40:57,971 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:57,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:57,971 INFO L82 PathProgramCache]: Analyzing trace with hash 17157354, now seen corresponding path program 6 times [2021-07-09 18:40:57,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:57,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137340198] [2021-07-09 18:40:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:57,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:57,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:57,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137340198] [2021-07-09 18:40:57,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137340198] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:40:57,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:40:57,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-09 18:40:57,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987244253] [2021-07-09 18:40:57,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:40:57,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:57,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:40:57,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:40:57,994 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:58,089 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-07-09 18:40:58,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:40:58,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:40:58,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:58,091 INFO L225 Difference]: With dead ends: 313 [2021-07-09 18:40:58,091 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 18:40:58,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:40:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 18:40:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-07-09 18:40:58,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-07-09 18:40:58,096 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-07-09 18:40:58,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:58,096 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-07-09 18:40:58,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-07-09 18:40:58,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:40:58,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:58,097 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:58,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-09 18:40:58,097 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash 751961810, now seen corresponding path program 1 times [2021-07-09 18:40:58,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:58,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395042222] [2021-07-09 18:40:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:58,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:40:58,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395042222] [2021-07-09 18:40:58,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395042222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086642567] [2021-07-09 18:40:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:40:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:40:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:40:58,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:40:58,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,707 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-07-09 18:40:58,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 25 [2021-07-09 18:40:58,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 18:40:58,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:58,842 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 33 [2021-07-09 18:40:58,843 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.0 percent of original size [2021-07-09 18:40:58,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,867 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-07-09 18:40:58,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 21 [2021-07-09 18:40:58,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:58,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:40:58,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:40:58,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 18:40:58,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:40:58,963 INFO L628 ElimStorePlain]: treesize reduction 2, result has 96.9 percent of original size [2021-07-09 18:40:58,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:40:58,967 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:70 [2021-07-09 18:40:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:40:59,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086642567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:40:59,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:40:59,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:40:59,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767700565] [2021-07-09 18:40:59,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:40:59,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:40:59,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:40:59,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:40:59,053 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:40:59,691 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-07-09 18:40:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:40:59,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:40:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:40:59,694 INFO L225 Difference]: With dead ends: 545 [2021-07-09 18:40:59,694 INFO L226 Difference]: Without dead ends: 515 [2021-07-09 18:40:59,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 825.7ms TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:40:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-07-09 18:40:59,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-07-09 18:40:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-07-09 18:40:59,700 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-07-09 18:40:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:40:59,701 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-07-09 18:40:59,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:40:59,701 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-07-09 18:40:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:40:59,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:40:59,701 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:40:59,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-09 18:40:59,918 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:40:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:40:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash 758582462, now seen corresponding path program 2 times [2021-07-09 18:40:59,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:40:59,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075473687] [2021-07-09 18:40:59,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:40:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075473687] [2021-07-09 18:41:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075473687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841002767] [2021-07-09 18:41:00,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:00,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:00,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:41:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,399 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:41:00,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-07-09 18:41:00,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:00,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-07-09 18:41:00,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:00,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,450 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:41:00,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-07-09 18:41:00,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:41:00,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:41:00,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-07-09 18:41:00,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:41:00,514 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-07-09 18:41:00,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:41:00,515 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-07-09 18:41:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:00,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841002767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:00,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:00,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-07-09 18:41:00,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494864222] [2021-07-09 18:41:00,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:41:00,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:41:00,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:41:00,588 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:01,709 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-07-09 18:41:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:01,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:41:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:01,712 INFO L225 Difference]: With dead ends: 697 [2021-07-09 18:41:01,712 INFO L226 Difference]: Without dead ends: 682 [2021-07-09 18:41:01,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1155.2ms TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:41:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-07-09 18:41:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-07-09 18:41:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-07-09 18:41:01,721 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-07-09 18:41:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:01,722 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-07-09 18:41:01,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-07-09 18:41:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:41:01,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:01,723 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:01,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:01,941 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:01,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1762556338, now seen corresponding path program 3 times [2021-07-09 18:41:01,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:01,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792290164] [2021-07-09 18:41:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:02,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792290164] [2021-07-09 18:41:02,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792290164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:02,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107288020] [2021-07-09 18:41:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:02,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:02,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:41:02,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:02,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107288020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:02,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:02,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:02,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100278632] [2021-07-09 18:41:02,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:02,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:02,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:02,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:02,552 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:02,803 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-07-09 18:41:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:41:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:41:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:02,805 INFO L225 Difference]: With dead ends: 450 [2021-07-09 18:41:02,805 INFO L226 Difference]: Without dead ends: 435 [2021-07-09 18:41:02,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 509.0ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:02,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-09 18:41:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-07-09 18:41:02,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-07-09 18:41:02,814 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-07-09 18:41:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:02,814 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-07-09 18:41:02,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:02,814 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-07-09 18:41:02,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:41:02,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:02,815 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:03,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:03,033 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:03,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:03,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1965066352, now seen corresponding path program 4 times [2021-07-09 18:41:03,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:03,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063560376] [2021-07-09 18:41:03,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:03,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:03,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063560376] [2021-07-09 18:41:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063560376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641336898] [2021-07-09 18:41:03,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:03,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:03,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:41:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:03,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641336898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:03,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:03,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:41:03,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905936542] [2021-07-09 18:41:03,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:41:03,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:41:03,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:03,588 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:03,795 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-07-09 18:41:03,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:41:03,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:41:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:03,797 INFO L225 Difference]: With dead ends: 406 [2021-07-09 18:41:03,797 INFO L226 Difference]: Without dead ends: 391 [2021-07-09 18:41:03,797 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-07-09 18:41:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-07-09 18:41:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-07-09 18:41:03,803 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-07-09 18:41:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:03,803 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-07-09 18:41:03,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-07-09 18:41:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:41:03,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:03,804 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:04,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:04,019 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:04,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:04,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1336701998, now seen corresponding path program 1 times [2021-07-09 18:41:04,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:04,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687541626] [2021-07-09 18:41:04,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:04,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687541626] [2021-07-09 18:41:04,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687541626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194432689] [2021-07-09 18:41:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-09 18:41:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:41:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194432689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:04,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:41:04,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92000457] [2021-07-09 18:41:04,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:04,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:04,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:04,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:04,274 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:04,313 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-07-09 18:41:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:41:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:41:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:04,315 INFO L225 Difference]: With dead ends: 469 [2021-07-09 18:41:04,315 INFO L226 Difference]: Without dead ends: 454 [2021-07-09 18:41:04,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-09 18:41:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-07-09 18:41:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-07-09 18:41:04,322 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-07-09 18:41:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:04,323 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-07-09 18:41:04,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-07-09 18:41:04,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:41:04,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:04,323 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:04,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:04,540 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:04,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash -297591214, now seen corresponding path program 2 times [2021-07-09 18:41:04,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:04,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341143817] [2021-07-09 18:41:04,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:04,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341143817] [2021-07-09 18:41:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341143817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91662916] [2021-07-09 18:41:04,609 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:04,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:04,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:41:04,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91662916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:04,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:04,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:41:04,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621547535] [2021-07-09 18:41:04,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:41:04,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:04,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:41:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:04,769 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:04,827 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-07-09 18:41:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:41:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:41:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:04,830 INFO L225 Difference]: With dead ends: 491 [2021-07-09 18:41:04,830 INFO L226 Difference]: Without dead ends: 476 [2021-07-09 18:41:04,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:41:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-09 18:41:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-07-09 18:41:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-07-09 18:41:04,838 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-07-09 18:41:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:04,838 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-07-09 18:41:04,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-07-09 18:41:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:04,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:04,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:05,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:05,057 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:05,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:05,057 INFO L82 PathProgramCache]: Analyzing trace with hash 127479732, now seen corresponding path program 5 times [2021-07-09 18:41:05,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:05,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123607300] [2021-07-09 18:41:05,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:05,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123607300] [2021-07-09 18:41:05,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123607300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:05,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352083080] [2021-07-09 18:41:05,091 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 [2021-07-09 18:41:05,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:05,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:05,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352083080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:05,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:05,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:41:05,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230387944] [2021-07-09 18:41:05,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:05,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:05,274 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:05,425 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-07-09 18:41:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:41:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:05,427 INFO L225 Difference]: With dead ends: 446 [2021-07-09 18:41:05,428 INFO L226 Difference]: Without dead ends: 446 [2021-07-09 18:41:05,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-07-09 18:41:05,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-07-09 18:41:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-07-09 18:41:05,435 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-07-09 18:41:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:05,435 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-07-09 18:41:05,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-07-09 18:41:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:05,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:05,451 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:05,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:41:05,668 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:05,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1011534832, now seen corresponding path program 6 times [2021-07-09 18:41:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:05,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565942768] [2021-07-09 18:41:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:05,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565942768] [2021-07-09 18:41:05,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565942768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:05,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171821188] [2021-07-09 18:41:05,701 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 [2021-07-09 18:41:05,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:05,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171821188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:05,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:05,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:05,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585098278] [2021-07-09 18:41:05,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:05,848 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:06,360 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-07-09 18:41:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:41:06,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:06,364 INFO L225 Difference]: With dead ends: 1017 [2021-07-09 18:41:06,364 INFO L226 Difference]: Without dead ends: 1017 [2021-07-09 18:41:06,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:41:06,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-09 18:41:06,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-07-09 18:41:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-07-09 18:41:06,378 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-07-09 18:41:06,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:06,378 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-07-09 18:41:06,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,378 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-07-09 18:41:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:06,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:06,379 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:06,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:06,593 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1961184076, now seen corresponding path program 1 times [2021-07-09 18:41:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:06,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435880411] [2021-07-09 18:41:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:06,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435880411] [2021-07-09 18:41:06,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435880411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727049094] [2021-07-09 18:41:06,625 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-07-09 18:41:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727049094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:06,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:06,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761403631] [2021-07-09 18:41:06,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:06,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:06,710 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:06,920 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-07-09 18:41:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:06,923 INFO L225 Difference]: With dead ends: 838 [2021-07-09 18:41:06,923 INFO L226 Difference]: Without dead ends: 832 [2021-07-09 18:41:06,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-07-09 18:41:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-07-09 18:41:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-07-09 18:41:06,935 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-07-09 18:41:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:06,935 INFO L482 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-07-09 18:41:06,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-07-09 18:41:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:06,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:06,936 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:07,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:41:07,152 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1602477532, now seen corresponding path program 2 times [2021-07-09 18:41:07,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:07,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030895555] [2021-07-09 18:41:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030895555] [2021-07-09 18:41:07,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030895555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520137431] [2021-07-09 18:41:07,187 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) [2021-07-09 18:41:07,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:07,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:07,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:07,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520137431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:07,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:07,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070904456] [2021-07-09 18:41:07,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:07,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:07,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:07,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:07,308 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:07,491 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-07-09 18:41:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:07,491 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:07,494 INFO L225 Difference]: With dead ends: 905 [2021-07-09 18:41:07,494 INFO L226 Difference]: Without dead ends: 905 [2021-07-09 18:41:07,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:07,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-07-09 18:41:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-07-09 18:41:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-07-09 18:41:07,509 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-07-09 18:41:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:07,509 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-07-09 18:41:07,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-07-09 18:41:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:07,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:07,512 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:07,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:07,728 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1743996268, now seen corresponding path program 7 times [2021-07-09 18:41:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902394229] [2021-07-09 18:41:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:07,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902394229] [2021-07-09 18:41:07,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902394229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10945757] [2021-07-09 18:41:07,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:41:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:07,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:07,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:07,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10945757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:07,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:07,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:07,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968339807] [2021-07-09 18:41:07,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:07,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:07,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:07,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:07,863 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:08,192 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-07-09 18:41:08,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:41:08,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:08,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:08,196 INFO L225 Difference]: With dead ends: 1149 [2021-07-09 18:41:08,197 INFO L226 Difference]: Without dead ends: 1145 [2021-07-09 18:41:08,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-07-09 18:41:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-07-09 18:41:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-07-09 18:41:08,212 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-07-09 18:41:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:08,212 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-07-09 18:41:08,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-07-09 18:41:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:08,213 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:08,213 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:08,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 18:41:08,430 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1159578392, now seen corresponding path program 3 times [2021-07-09 18:41:08,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:08,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050353330] [2021-07-09 18:41:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:08,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050353330] [2021-07-09 18:41:08,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050353330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772844641] [2021-07-09 18:41:08,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:41:08,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:08,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:08,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:08,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772844641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:08,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:08,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810793245] [2021-07-09 18:41:08,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:08,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:08,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:08,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:08,577 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:08,690 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-07-09 18:41:08,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:41:08,691 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:08,695 INFO L225 Difference]: With dead ends: 751 [2021-07-09 18:41:08,696 INFO L226 Difference]: Without dead ends: 751 [2021-07-09 18:41:08,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-07-09 18:41:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-07-09 18:41:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-07-09 18:41:08,726 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-07-09 18:41:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:08,726 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-07-09 18:41:08,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-07-09 18:41:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:08,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:08,727 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:08,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:08,953 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash -480090768, now seen corresponding path program 8 times [2021-07-09 18:41:08,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:08,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144797650] [2021-07-09 18:41:08,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:08,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:08,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144797650] [2021-07-09 18:41:08,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144797650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:08,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993764600] [2021-07-09 18:41:08,989 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 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 [2021-07-09 18:41:09,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:09,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:09,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993764600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:09,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:09,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:09,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117279097] [2021-07-09 18:41:09,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:09,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:09,074 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:09,283 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-07-09 18:41:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:09,287 INFO L225 Difference]: With dead ends: 983 [2021-07-09 18:41:09,287 INFO L226 Difference]: Without dead ends: 971 [2021-07-09 18:41:09,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:41:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-07-09 18:41:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-07-09 18:41:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-07-09 18:41:09,299 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-07-09 18:41:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:09,299 INFO L482 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-07-09 18:41:09,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-07-09 18:41:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:09,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:09,300 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:09,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:09,516 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:09,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:09,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1407034092, now seen corresponding path program 9 times [2021-07-09 18:41:09,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:09,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414444253] [2021-07-09 18:41:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:09,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414444253] [2021-07-09 18:41:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414444253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054495167] [2021-07-09 18:41:09,560 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 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 [2021-07-09 18:41:09,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:09,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:09,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:09,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054495167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:09,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:09,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:41:09,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26077185] [2021-07-09 18:41:09,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:09,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:09,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:09,671 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:09,831 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-07-09 18:41:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:09,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:09,834 INFO L225 Difference]: With dead ends: 983 [2021-07-09 18:41:09,834 INFO L226 Difference]: Without dead ends: 983 [2021-07-09 18:41:09,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:41:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-07-09 18:41:09,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-07-09 18:41:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-07-09 18:41:09,846 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-07-09 18:41:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:09,846 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-07-09 18:41:09,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-07-09 18:41:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:09,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:09,847 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:10,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:10,064 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:10,064 INFO L82 PathProgramCache]: Analyzing trace with hash 2004028396, now seen corresponding path program 10 times [2021-07-09 18:41:10,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:10,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738122142] [2021-07-09 18:41:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738122142] [2021-07-09 18:41:10,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738122142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493101021] [2021-07-09 18:41:10,095 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:10,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:10,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493101021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:10,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:10,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575852501] [2021-07-09 18:41:10,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:10,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:10,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:10,214 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:10,706 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-07-09 18:41:10,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:41:10,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:10,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:10,713 INFO L225 Difference]: With dead ends: 1871 [2021-07-09 18:41:10,713 INFO L226 Difference]: Without dead ends: 1871 [2021-07-09 18:41:10,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:41:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-07-09 18:41:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-07-09 18:41:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-07-09 18:41:10,732 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-07-09 18:41:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:10,732 INFO L482 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-07-09 18:41:10,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:10,732 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-07-09 18:41:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:10,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:10,733 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:10,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:10,949 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1558477464, now seen corresponding path program 11 times [2021-07-09 18:41:10,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:10,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510152871] [2021-07-09 18:41:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:10,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510152871] [2021-07-09 18:41:10,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510152871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:10,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115405328] [2021-07-09 18:41:10,980 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 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 [2021-07-09 18:41:11,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:11,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:11,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115405328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:11,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:11,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038542618] [2021-07-09 18:41:11,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:11,097 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:11,575 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-07-09 18:41:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:41:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:11,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:11,586 INFO L225 Difference]: With dead ends: 1774 [2021-07-09 18:41:11,586 INFO L226 Difference]: Without dead ends: 1766 [2021-07-09 18:41:11,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-07-09 18:41:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-07-09 18:41:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-07-09 18:41:11,618 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-07-09 18:41:11,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:11,632 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-07-09 18:41:11,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:11,633 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-07-09 18:41:11,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:11,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:11,634 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:11,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-07-09 18:41:11,835 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1799894256, now seen corresponding path program 12 times [2021-07-09 18:41:11,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:11,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234926143] [2021-07-09 18:41:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:11,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234926143] [2021-07-09 18:41:11,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234926143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36544021] [2021-07-09 18:41:11,882 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 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 [2021-07-09 18:41:11,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:11,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36544021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:11,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:11,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:11,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242512693] [2021-07-09 18:41:11,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:11,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:11,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:11,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:11,993 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:12,407 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-07-09 18:41:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:41:12,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:12,411 INFO L225 Difference]: With dead ends: 1916 [2021-07-09 18:41:12,412 INFO L226 Difference]: Without dead ends: 1916 [2021-07-09 18:41:12,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:41:12,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-07-09 18:41:12,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-07-09 18:41:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:12,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-07-09 18:41:12,443 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-07-09 18:41:12,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:12,443 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-07-09 18:41:12,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:12,443 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-07-09 18:41:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:12,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:12,444 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:12,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:12,660 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:12,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1036250512, now seen corresponding path program 13 times [2021-07-09 18:41:12,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:12,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575193471] [2021-07-09 18:41:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575193471] [2021-07-09 18:41:12,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575193471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076757323] [2021-07-09 18:41:12,705 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 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 [2021-07-09 18:41:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:12,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:12,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076757323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:12,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:12,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:12,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243848867] [2021-07-09 18:41:12,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:12,806 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:13,289 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-07-09 18:41:13,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:41:13,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:13,293 INFO L225 Difference]: With dead ends: 1888 [2021-07-09 18:41:13,293 INFO L226 Difference]: Without dead ends: 1888 [2021-07-09 18:41:13,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:41:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-07-09 18:41:13,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-07-09 18:41:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-07-09 18:41:13,309 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-07-09 18:41:13,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:13,309 INFO L482 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-07-09 18:41:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-07-09 18:41:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:13,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:13,311 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:13,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:13,526 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:13,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:13,527 INFO L82 PathProgramCache]: Analyzing trace with hash 904089908, now seen corresponding path program 14 times [2021-07-09 18:41:13,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:13,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578600208] [2021-07-09 18:41:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:13,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:13,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578600208] [2021-07-09 18:41:13,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578600208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:13,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350242875] [2021-07-09 18:41:13,558 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 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 [2021-07-09 18:41:13,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:13,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:13,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:13,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350242875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:13,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:13,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:41:13,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348361877] [2021-07-09 18:41:13,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:13,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:13,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:13,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:13,648 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:13,796 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-07-09 18:41:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:13,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:13,798 INFO L225 Difference]: With dead ends: 912 [2021-07-09 18:41:13,798 INFO L226 Difference]: Without dead ends: 902 [2021-07-09 18:41:13,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:41:13,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-07-09 18:41:13,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-07-09 18:41:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-07-09 18:41:13,809 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-07-09 18:41:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:13,809 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-07-09 18:41:13,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-07-09 18:41:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:13,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:13,810 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:14,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 18:41:14,026 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:14,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash -285121176, now seen corresponding path program 15 times [2021-07-09 18:41:14,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:14,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086711277] [2021-07-09 18:41:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:14,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086711277] [2021-07-09 18:41:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086711277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585707606] [2021-07-09 18:41:14,072 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 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 [2021-07-09 18:41:14,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:14,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:14,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585707606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:14,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:14,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669103591] [2021-07-09 18:41:14,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:14,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:14,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:14,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:14,168 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:14,496 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-07-09 18:41:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:41:14,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:14,500 INFO L225 Difference]: With dead ends: 1623 [2021-07-09 18:41:14,500 INFO L226 Difference]: Without dead ends: 1615 [2021-07-09 18:41:14,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-07-09 18:41:14,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-07-09 18:41:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-07-09 18:41:14,516 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-07-09 18:41:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:14,516 INFO L482 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-07-09 18:41:14,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-07-09 18:41:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:14,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:14,518 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:14,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:14,733 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash 693436268, now seen corresponding path program 16 times [2021-07-09 18:41:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:14,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154105158] [2021-07-09 18:41:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:14,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154105158] [2021-07-09 18:41:14,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154105158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208915374] [2021-07-09 18:41:14,765 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 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 [2021-07-09 18:41:14,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:14,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:14,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208915374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:14,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:14,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:14,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602448624] [2021-07-09 18:41:14,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:14,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:14,852 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:15,295 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-07-09 18:41:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:41:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:15,299 INFO L225 Difference]: With dead ends: 1707 [2021-07-09 18:41:15,299 INFO L226 Difference]: Without dead ends: 1707 [2021-07-09 18:41:15,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-07-09 18:41:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-07-09 18:41:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-07-09 18:41:15,316 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-07-09 18:41:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:15,316 INFO L482 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-07-09 18:41:15,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-07-09 18:41:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:15,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:15,319 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:15,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-07-09 18:41:15,535 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:15,535 INFO L82 PathProgramCache]: Analyzing trace with hash 339248496, now seen corresponding path program 17 times [2021-07-09 18:41:15,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:15,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154635155] [2021-07-09 18:41:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:15,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154635155] [2021-07-09 18:41:15,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154635155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:15,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102214915] [2021-07-09 18:41:15,567 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 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 [2021-07-09 18:41:15,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:15,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:15,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:15,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:15,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102214915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:15,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:15,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:15,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281707926] [2021-07-09 18:41:15,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:15,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:15,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:15,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:15,658 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:15,882 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-07-09 18:41:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:15,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:15,885 INFO L225 Difference]: With dead ends: 1202 [2021-07-09 18:41:15,885 INFO L226 Difference]: Without dead ends: 1190 [2021-07-09 18:41:15,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-07-09 18:41:15,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-07-09 18:41:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-07-09 18:41:15,897 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-07-09 18:41:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:15,897 INFO L482 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-07-09 18:41:15,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-07-09 18:41:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:15,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:15,899 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:16,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:41:16,113 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1260950636, now seen corresponding path program 18 times [2021-07-09 18:41:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:16,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003547957] [2021-07-09 18:41:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:16,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:16,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003547957] [2021-07-09 18:41:16,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003547957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540711520] [2021-07-09 18:41:16,145 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 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 [2021-07-09 18:41:16,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:16,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:16,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:16,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540711520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:16,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:16,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277198019] [2021-07-09 18:41:16,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:16,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:16,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:16,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:16,265 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:16,577 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-07-09 18:41:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:41:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:16,580 INFO L225 Difference]: With dead ends: 1451 [2021-07-09 18:41:16,580 INFO L226 Difference]: Without dead ends: 1443 [2021-07-09 18:41:16,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-07-09 18:41:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-07-09 18:41:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-07-09 18:41:16,594 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-07-09 18:41:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:16,594 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-07-09 18:41:16,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-07-09 18:41:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:16,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:16,596 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:16,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:16,811 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2055459216, now seen corresponding path program 19 times [2021-07-09 18:41:16,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:16,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35137976] [2021-07-09 18:41:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:16,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35137976] [2021-07-09 18:41:16,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35137976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368534633] [2021-07-09 18:41:16,847 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 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 [2021-07-09 18:41:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:16,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:16,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368534633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:16,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:16,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:16,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435425484] [2021-07-09 18:41:16,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:16,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:16,944 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:17,294 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-07-09 18:41:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:41:17,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:17,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:17,298 INFO L225 Difference]: With dead ends: 1579 [2021-07-09 18:41:17,298 INFO L226 Difference]: Without dead ends: 1579 [2021-07-09 18:41:17,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-07-09 18:41:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-07-09 18:41:17,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-07-09 18:41:17,312 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-07-09 18:41:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:17,312 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-07-09 18:41:17,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-07-09 18:41:17,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:17,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:17,313 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:17,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:17,529 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:17,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1812947492, now seen corresponding path program 20 times [2021-07-09 18:41:17,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:17,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603562726] [2021-07-09 18:41:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:17,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:17,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603562726] [2021-07-09 18:41:17,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603562726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:17,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685315194] [2021-07-09 18:41:17,557 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 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 [2021-07-09 18:41:17,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:17,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:17,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:17,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685315194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:17,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:17,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:41:17,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195884120] [2021-07-09 18:41:17,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:17,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:17,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:17,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:17,668 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:17,940 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-07-09 18:41:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:41:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:17,944 INFO L225 Difference]: With dead ends: 1913 [2021-07-09 18:41:17,944 INFO L226 Difference]: Without dead ends: 1913 [2021-07-09 18:41:17,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-07-09 18:41:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-07-09 18:41:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-07-09 18:41:17,962 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-07-09 18:41:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:17,962 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-07-09 18:41:17,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:17,962 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-07-09 18:41:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:17,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:17,964 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:18,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:18,180 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:18,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:18,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1979075620, now seen corresponding path program 21 times [2021-07-09 18:41:18,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:18,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759344979] [2021-07-09 18:41:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:18,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759344979] [2021-07-09 18:41:18,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759344979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033819492] [2021-07-09 18:41:18,207 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 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 [2021-07-09 18:41:18,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:18,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033819492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:18,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:41:18,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843056458] [2021-07-09 18:41:18,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:18,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:18,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:18,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:18,304 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:18,549 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-07-09 18:41:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:41:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:18,552 INFO L225 Difference]: With dead ends: 1741 [2021-07-09 18:41:18,552 INFO L226 Difference]: Without dead ends: 1731 [2021-07-09 18:41:18,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:41:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-07-09 18:41:18,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-07-09 18:41:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-07-09 18:41:18,568 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-07-09 18:41:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:18,568 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-07-09 18:41:18,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-07-09 18:41:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:18,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:18,570 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:18,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:18,786 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:18,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:18,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1712063380, now seen corresponding path program 22 times [2021-07-09 18:41:18,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:18,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834410086] [2021-07-09 18:41:18,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834410086] [2021-07-09 18:41:18,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834410086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536335823] [2021-07-09 18:41:18,814 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 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 [2021-07-09 18:41:18,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:18,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:18,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:18,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:18,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536335823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:18,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:18,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:18,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467691477] [2021-07-09 18:41:18,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:18,905 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:19,241 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-07-09 18:41:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:19,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:19,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:19,244 INFO L225 Difference]: With dead ends: 1821 [2021-07-09 18:41:19,245 INFO L226 Difference]: Without dead ends: 1821 [2021-07-09 18:41:19,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:41:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-07-09 18:41:19,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-07-09 18:41:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-07-09 18:41:19,264 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-07-09 18:41:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:19,265 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-07-09 18:41:19,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-07-09 18:41:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:19,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:19,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:19,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:19,482 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:19,482 INFO L82 PathProgramCache]: Analyzing trace with hash -406491114, now seen corresponding path program 23 times [2021-07-09 18:41:19,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:19,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487335781] [2021-07-09 18:41:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:19,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487335781] [2021-07-09 18:41:19,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487335781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176025850] [2021-07-09 18:41:19,510 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 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 [2021-07-09 18:41:19,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:19,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:19,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:19,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:19,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176025850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:19,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:19,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:41:19,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957317900] [2021-07-09 18:41:19,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:19,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:19,620 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:19,762 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-07-09 18:41:19,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:19,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:19,764 INFO L225 Difference]: With dead ends: 1342 [2021-07-09 18:41:19,764 INFO L226 Difference]: Without dead ends: 1311 [2021-07-09 18:41:19,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:41:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-07-09 18:41:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-07-09 18:41:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-07-09 18:41:19,779 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-07-09 18:41:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:19,779 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-07-09 18:41:19,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-07-09 18:41:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:19,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:19,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:19,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-07-09 18:41:19,996 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:19,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1176867492, now seen corresponding path program 24 times [2021-07-09 18:41:19,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:19,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480203377] [2021-07-09 18:41:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:20,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:20,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480203377] [2021-07-09 18:41:20,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480203377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777477261] [2021-07-09 18:41:20,026 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 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 [2021-07-09 18:41:20,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:20,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:20,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777477261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:20,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:20,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219560147] [2021-07-09 18:41:20,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:20,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:20,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:20,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:20,100 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:20,453 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-07-09 18:41:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:41:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:20,458 INFO L225 Difference]: With dead ends: 2119 [2021-07-09 18:41:20,458 INFO L226 Difference]: Without dead ends: 2115 [2021-07-09 18:41:20,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-07-09 18:41:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-07-09 18:41:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-07-09 18:41:20,480 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-07-09 18:41:20,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:20,481 INFO L482 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-07-09 18:41:20,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-07-09 18:41:20,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:20,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:20,483 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:20,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:20,699 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:20,699 INFO L82 PathProgramCache]: Analyzing trace with hash -198310048, now seen corresponding path program 25 times [2021-07-09 18:41:20,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:20,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195927978] [2021-07-09 18:41:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:20,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195927978] [2021-07-09 18:41:20,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195927978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819959406] [2021-07-09 18:41:20,727 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 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 [2021-07-09 18:41:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:20,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:20,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:20,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819959406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:20,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:20,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:20,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826506802] [2021-07-09 18:41:20,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:20,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:20,807 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:21,226 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-07-09 18:41:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:41:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:21,230 INFO L225 Difference]: With dead ends: 2273 [2021-07-09 18:41:21,230 INFO L226 Difference]: Without dead ends: 2273 [2021-07-09 18:41:21,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:41:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-07-09 18:41:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-07-09 18:41:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-07-09 18:41:21,254 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-07-09 18:41:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:21,255 INFO L482 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-07-09 18:41:21,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-07-09 18:41:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:21,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:21,256 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:21,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 18:41:21,472 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2016185652, now seen corresponding path program 26 times [2021-07-09 18:41:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:21,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690867642] [2021-07-09 18:41:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:21,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690867642] [2021-07-09 18:41:21,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690867642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177800545] [2021-07-09 18:41:21,506 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 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 [2021-07-09 18:41:21,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:21,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:21,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:21,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:21,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177800545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:21,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:21,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:21,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146868144] [2021-07-09 18:41:21,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:21,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:21,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:21,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:21,657 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:21,918 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-07-09 18:41:21,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:21,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:21,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:21,922 INFO L225 Difference]: With dead ends: 2014 [2021-07-09 18:41:21,922 INFO L226 Difference]: Without dead ends: 2014 [2021-07-09 18:41:21,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:41:21,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-07-09 18:41:21,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-07-09 18:41:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-07-09 18:41:21,942 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-07-09 18:41:21,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:21,942 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-07-09 18:41:21,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-07-09 18:41:21,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:21,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:21,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:22,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:22,160 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash -499902228, now seen corresponding path program 27 times [2021-07-09 18:41:22,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:22,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465082349] [2021-07-09 18:41:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:22,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465082349] [2021-07-09 18:41:22,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465082349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932789182] [2021-07-09 18:41:22,189 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 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 [2021-07-09 18:41:22,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:22,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:22,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932789182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:22,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:41:22,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770489617] [2021-07-09 18:41:22,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:22,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:22,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:22,292 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:22,505 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-07-09 18:41:22,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-07-09 18:41:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:22,508 INFO L225 Difference]: With dead ends: 1776 [2021-07-09 18:41:22,508 INFO L226 Difference]: Without dead ends: 1764 [2021-07-09 18:41:22,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:22,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-07-09 18:41:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-07-09 18:41:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:22,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-07-09 18:41:22,538 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-07-09 18:41:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:22,538 INFO L482 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-07-09 18:41:22,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:22,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-07-09 18:41:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:22,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:22,540 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:22,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 18:41:22,757 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1595195728, now seen corresponding path program 28 times [2021-07-09 18:41:22,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:22,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366256507] [2021-07-09 18:41:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:22,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366256507] [2021-07-09 18:41:22,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366256507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471367169] [2021-07-09 18:41:22,786 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 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 [2021-07-09 18:41:22,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:22,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:22,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:22,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:22,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471367169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:22,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:22,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:41:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247156869] [2021-07-09 18:41:22,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:22,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:22,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:22,854 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:23,121 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-07-09 18:41:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-07-09 18:41:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:23,125 INFO L225 Difference]: With dead ends: 1940 [2021-07-09 18:41:23,125 INFO L226 Difference]: Without dead ends: 1940 [2021-07-09 18:41:23,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 153.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-07-09 18:41:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-07-09 18:41:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-07-09 18:41:23,145 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-07-09 18:41:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:23,145 INFO L482 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-07-09 18:41:23,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-07-09 18:41:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:23,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:23,147 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:23,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:41:23,363 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1507209712, now seen corresponding path program 3 times [2021-07-09 18:41:23,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:23,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751286585] [2021-07-09 18:41:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:23,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751286585] [2021-07-09 18:41:23,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751286585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433704989] [2021-07-09 18:41:23,416 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 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 [2021-07-09 18:41:23,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:23,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:23,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433704989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:23,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:23,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:23,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081581424] [2021-07-09 18:41:23,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:23,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:23,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:23,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:23,531 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:23,811 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-07-09 18:41:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:41:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:23,814 INFO L225 Difference]: With dead ends: 1759 [2021-07-09 18:41:23,814 INFO L226 Difference]: Without dead ends: 1759 [2021-07-09 18:41:23,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-07-09 18:41:23,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-07-09 18:41:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-07-09 18:41:23,832 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-07-09 18:41:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:23,832 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-07-09 18:41:23,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:23,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-07-09 18:41:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:23,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:23,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:24,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 18:41:24,050 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:24,050 INFO L82 PathProgramCache]: Analyzing trace with hash 877590964, now seen corresponding path program 4 times [2021-07-09 18:41:24,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:24,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093007916] [2021-07-09 18:41:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:24,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093007916] [2021-07-09 18:41:24,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093007916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842788590] [2021-07-09 18:41:24,077 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:24,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:24,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842788590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:24,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:41:24,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929382687] [2021-07-09 18:41:24,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:41:24,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:24,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:41:24,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:41:24,148 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:24,259 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-07-09 18:41:24,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:41:24,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:24,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:24,262 INFO L225 Difference]: With dead ends: 1872 [2021-07-09 18:41:24,262 INFO L226 Difference]: Without dead ends: 1854 [2021-07-09 18:41:24,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:41:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-07-09 18:41:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-07-09 18:41:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-07-09 18:41:24,305 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-07-09 18:41:24,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:24,305 INFO L482 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-07-09 18:41:24,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-07-09 18:41:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:24,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:24,307 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:24,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:41:24,521 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 118622872, now seen corresponding path program 5 times [2021-07-09 18:41:24,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:24,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413897194] [2021-07-09 18:41:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413897194] [2021-07-09 18:41:24,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413897194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444403315] [2021-07-09 18:41:24,564 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:24,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:24,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:24,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444403315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:24,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:24,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 18:41:24,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128461105] [2021-07-09 18:41:24,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:41:24,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:24,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:41:24,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:41:24,638 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:24,768 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-07-09 18:41:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:41:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:24,772 INFO L225 Difference]: With dead ends: 2133 [2021-07-09 18:41:24,772 INFO L226 Difference]: Without dead ends: 2133 [2021-07-09 18:41:24,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:41:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-07-09 18:41:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-07-09 18:41:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-07-09 18:41:24,796 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-07-09 18:41:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:24,797 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-07-09 18:41:24,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-07-09 18:41:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:24,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:24,799 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:25,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 18:41:25,015 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash 260141608, now seen corresponding path program 6 times [2021-07-09 18:41:25,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:25,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223027318] [2021-07-09 18:41:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:25,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223027318] [2021-07-09 18:41:25,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223027318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705490091] [2021-07-09 18:41:25,044 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:25,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:41:25,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:25,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705490091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:25,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:41:25,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565299255] [2021-07-09 18:41:25,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:25,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:25,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:25,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:25,148 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:25,389 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-07-09 18:41:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:41:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:25,392 INFO L225 Difference]: With dead ends: 2050 [2021-07-09 18:41:25,392 INFO L226 Difference]: Without dead ends: 2046 [2021-07-09 18:41:25,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-07-09 18:41:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-07-09 18:41:25,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-07-09 18:41:25,418 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-07-09 18:41:25,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:25,418 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-07-09 18:41:25,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:25,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-07-09 18:41:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:25,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:25,421 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:25,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 18:41:25,637 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1708393328, now seen corresponding path program 7 times [2021-07-09 18:41:25,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:25,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071594009] [2021-07-09 18:41:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:25,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071594009] [2021-07-09 18:41:25,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071594009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575244299] [2021-07-09 18:41:25,666 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:25,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:25,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575244299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:25,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:25,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:41:25,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135284165] [2021-07-09 18:41:25,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:25,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:25,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:25,749 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:26,012 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-07-09 18:41:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:26,016 INFO L225 Difference]: With dead ends: 2257 [2021-07-09 18:41:26,016 INFO L226 Difference]: Without dead ends: 2257 [2021-07-09 18:41:26,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-07-09 18:41:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-07-09 18:41:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-07-09 18:41:26,040 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-07-09 18:41:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:26,040 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-07-09 18:41:26,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-07-09 18:41:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:26,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:26,042 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:26,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:26,258 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1264325580, now seen corresponding path program 8 times [2021-07-09 18:41:26,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:26,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148936579] [2021-07-09 18:41:26,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:26,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148936579] [2021-07-09 18:41:26,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148936579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:26,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128361984] [2021-07-09 18:41:26,281 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:26,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:26,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:26,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:26,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128361984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:26,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:26,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 18:41:26,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730615701] [2021-07-09 18:41:26,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:41:26,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:26,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:41:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:41:26,358 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:26,496 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-07-09 18:41:26,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:41:26,496 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:26,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:26,500 INFO L225 Difference]: With dead ends: 2263 [2021-07-09 18:41:26,500 INFO L226 Difference]: Without dead ends: 2257 [2021-07-09 18:41:26,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:41:26,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-07-09 18:41:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-07-09 18:41:26,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-07-09 18:41:26,524 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-07-09 18:41:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:26,524 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-07-09 18:41:26,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-07-09 18:41:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:26,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:26,526 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:26,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:26,742 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:26,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:26,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1995631268, now seen corresponding path program 9 times [2021-07-09 18:41:26,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:26,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489595642] [2021-07-09 18:41:26,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:26,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:26,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489595642] [2021-07-09 18:41:26,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489595642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:26,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962561576] [2021-07-09 18:41:26,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:26,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:26,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:26,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962561576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:26,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:26,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-07-09 18:41:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943505308] [2021-07-09 18:41:26,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:41:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:26,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:41:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:41:26,877 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:27,017 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-07-09 18:41:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:41:27,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:27,022 INFO L225 Difference]: With dead ends: 2415 [2021-07-09 18:41:27,022 INFO L226 Difference]: Without dead ends: 2415 [2021-07-09 18:41:27,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:41:27,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-09 18:41:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-07-09 18:41:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-07-09 18:41:27,045 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-07-09 18:41:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:27,045 INFO L482 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-07-09 18:41:27,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-07-09 18:41:27,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:27,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:27,048 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:27,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:41:27,264 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:27,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1854112532, now seen corresponding path program 10 times [2021-07-09 18:41:27,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:27,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049058692] [2021-07-09 18:41:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:27,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049058692] [2021-07-09 18:41:27,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049058692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664799775] [2021-07-09 18:41:27,296 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:27,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:27,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664799775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:27,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:41:27,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216443176] [2021-07-09 18:41:27,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:27,374 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:27,604 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-07-09 18:41:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:41:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:27,608 INFO L225 Difference]: With dead ends: 2204 [2021-07-09 18:41:27,608 INFO L226 Difference]: Without dead ends: 2200 [2021-07-09 18:41:27,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:27,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-07-09 18:41:27,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-07-09 18:41:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-07-09 18:41:27,629 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-07-09 18:41:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:27,629 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-07-09 18:41:27,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-07-09 18:41:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:27,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:27,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:27,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:27,845 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1856436888, now seen corresponding path program 11 times [2021-07-09 18:41:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:27,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819990515] [2021-07-09 18:41:27,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:27,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819990515] [2021-07-09 18:41:27,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819990515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20084239] [2021-07-09 18:41:27,870 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:27,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:27,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:27,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:27,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:27,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20084239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:27,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:27,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:41:27,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984739078] [2021-07-09 18:41:27,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:41:27,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:27,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:41:27,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:41:27,976 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:28,112 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-07-09 18:41:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:28,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:28,116 INFO L225 Difference]: With dead ends: 2022 [2021-07-09 18:41:28,116 INFO L226 Difference]: Without dead ends: 2022 [2021-07-09 18:41:28,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:41:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-07-09 18:41:28,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-07-09 18:41:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-07-09 18:41:28,139 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-07-09 18:41:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:28,139 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-07-09 18:41:28,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-07-09 18:41:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:28,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:28,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:28,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-09 18:41:28,358 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:28,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:28,358 INFO L82 PathProgramCache]: Analyzing trace with hash 216767728, now seen corresponding path program 12 times [2021-07-09 18:41:28,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:28,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7437066] [2021-07-09 18:41:28,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:28,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:28,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7437066] [2021-07-09 18:41:28,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7437066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:28,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894049168] [2021-07-09 18:41:28,388 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:28,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:28,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:28,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894049168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:28,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:28,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:28,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004217905] [2021-07-09 18:41:28,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:28,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:28,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:28,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:28,535 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:28,743 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-07-09 18:41:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:28,748 INFO L225 Difference]: With dead ends: 2124 [2021-07-09 18:41:28,748 INFO L226 Difference]: Without dead ends: 2112 [2021-07-09 18:41:28,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:41:28,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-07-09 18:41:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-07-09 18:41:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-07-09 18:41:28,774 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-07-09 18:41:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:28,774 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-07-09 18:41:28,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-07-09 18:41:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:28,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:28,777 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:28,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:28,994 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:28,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:28,994 INFO L82 PathProgramCache]: Analyzing trace with hash -670090772, now seen corresponding path program 4 times [2021-07-09 18:41:28,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:28,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933944618] [2021-07-09 18:41:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933944618] [2021-07-09 18:41:29,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933944618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150860799] [2021-07-09 18:41:29,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:29,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:29,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:29,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150860799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:29,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:29,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091872763] [2021-07-09 18:41:29,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:29,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:29,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:29,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:29,115 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:29,379 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-07-09 18:41:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:29,383 INFO L225 Difference]: With dead ends: 2332 [2021-07-09 18:41:29,383 INFO L226 Difference]: Without dead ends: 2320 [2021-07-09 18:41:29,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-07-09 18:41:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-07-09 18:41:29,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-07-09 18:41:29,408 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-07-09 18:41:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:29,408 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-07-09 18:41:29,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-07-09 18:41:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:29,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:29,411 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:29,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 18:41:29,627 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1401396460, now seen corresponding path program 5 times [2021-07-09 18:41:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:29,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626777571] [2021-07-09 18:41:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:29,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626777571] [2021-07-09 18:41:29,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626777571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985185579] [2021-07-09 18:41:29,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:29,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:29,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:29,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985185579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:29,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:29,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:29,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906585247] [2021-07-09 18:41:29,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:29,736 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:30,021 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-07-09 18:41:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:41:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:30,025 INFO L225 Difference]: With dead ends: 2490 [2021-07-09 18:41:30,025 INFO L226 Difference]: Without dead ends: 2490 [2021-07-09 18:41:30,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:41:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-07-09 18:41:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-07-09 18:41:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-07-09 18:41:30,054 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-07-09 18:41:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:30,054 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-07-09 18:41:30,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-07-09 18:41:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:30,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:30,057 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:30,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 18:41:30,274 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:30,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1810785004, now seen corresponding path program 13 times [2021-07-09 18:41:30,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:30,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490626658] [2021-07-09 18:41:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490626658] [2021-07-09 18:41:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490626658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224996243] [2021-07-09 18:41:30,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:30,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224996243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:30,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:30,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551601610] [2021-07-09 18:41:30,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:30,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:30,392 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:30,665 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-07-09 18:41:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:41:30,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:30,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:30,670 INFO L225 Difference]: With dead ends: 2497 [2021-07-09 18:41:30,670 INFO L226 Difference]: Without dead ends: 2497 [2021-07-09 18:41:30,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:41:30,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-07-09 18:41:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-07-09 18:41:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-07-09 18:41:30,706 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-07-09 18:41:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:30,706 INFO L482 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-07-09 18:41:30,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-07-09 18:41:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:30,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:30,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:30,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:41:30,925 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -168744536, now seen corresponding path program 14 times [2021-07-09 18:41:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:30,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018787238] [2021-07-09 18:41:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:30,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:30,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018787238] [2021-07-09 18:41:30,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018787238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:30,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245557361] [2021-07-09 18:41:30,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:31,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:31,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:31,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245557361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:31,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:31,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859237739] [2021-07-09 18:41:31,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:31,111 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:31,611 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-07-09 18:41:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:41:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:31,615 INFO L225 Difference]: With dead ends: 2724 [2021-07-09 18:41:31,615 INFO L226 Difference]: Without dead ends: 2724 [2021-07-09 18:41:31,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-07-09 18:41:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-07-09 18:41:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-07-09 18:41:31,642 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-07-09 18:41:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:31,642 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-07-09 18:41:31,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-07-09 18:41:31,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:31,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:31,644 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:31,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-09 18:41:31,860 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash 563716900, now seen corresponding path program 15 times [2021-07-09 18:41:31,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:31,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008234460] [2021-07-09 18:41:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:31,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008234460] [2021-07-09 18:41:31,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008234460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039974585] [2021-07-09 18:41:31,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:31,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:41:31,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:31,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:31,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039974585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:31,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:31,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:31,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973201122] [2021-07-09 18:41:31,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:31,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:31,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:31,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:31,986 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:32,395 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-07-09 18:41:32,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:41:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:32,399 INFO L225 Difference]: With dead ends: 2582 [2021-07-09 18:41:32,400 INFO L226 Difference]: Without dead ends: 2578 [2021-07-09 18:41:32,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 264.6ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:41:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-07-09 18:41:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-07-09 18:41:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-07-09 18:41:32,426 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-07-09 18:41:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:32,426 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-07-09 18:41:32,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-07-09 18:41:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:32,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:32,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:32,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:32,645 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1088595216, now seen corresponding path program 16 times [2021-07-09 18:41:32,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:32,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811831460] [2021-07-09 18:41:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:32,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:32,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811831460] [2021-07-09 18:41:32,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811831460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:32,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990345725] [2021-07-09 18:41:32,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:32,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:32,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:32,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:32,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990345725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:32,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:32,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:32,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170458308] [2021-07-09 18:41:32,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:32,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:32,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:32,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:32,758 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:33,074 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-07-09 18:41:33,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:41:33,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:33,078 INFO L225 Difference]: With dead ends: 2411 [2021-07-09 18:41:33,078 INFO L226 Difference]: Without dead ends: 2411 [2021-07-09 18:41:33,078 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:41:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-07-09 18:41:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-07-09 18:41:33,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-07-09 18:41:33,103 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-07-09 18:41:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:33,103 INFO L482 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-07-09 18:41:33,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-07-09 18:41:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:33,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:33,105 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:33,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 18:41:33,321 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:33,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1331852852, now seen corresponding path program 6 times [2021-07-09 18:41:33,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:33,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122345677] [2021-07-09 18:41:33,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:33,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122345677] [2021-07-09 18:41:33,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122345677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372929271] [2021-07-09 18:41:33,343 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:33,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:33,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372929271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:33,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:33,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173365563] [2021-07-09 18:41:33,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:33,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:33,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:33,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:33,435 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:33,657 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-07-09 18:41:33,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:41:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:33,660 INFO L225 Difference]: With dead ends: 1987 [2021-07-09 18:41:33,660 INFO L226 Difference]: Without dead ends: 1975 [2021-07-09 18:41:33,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:41:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-07-09 18:41:33,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-07-09 18:41:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-07-09 18:41:33,682 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-07-09 18:41:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:33,682 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-07-09 18:41:33,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-07-09 18:41:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:33,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:33,685 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:33,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:41:33,901 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1010707988, now seen corresponding path program 7 times [2021-07-09 18:41:33,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:33,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48398236] [2021-07-09 18:41:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:33,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48398236] [2021-07-09 18:41:33,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48398236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:33,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344401465] [2021-07-09 18:41:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:33,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344401465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:34,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:34,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089684230] [2021-07-09 18:41:34,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:34,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:34,035 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:34,258 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-07-09 18:41:34,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:41:34,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:34,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:34,262 INFO L225 Difference]: With dead ends: 1951 [2021-07-09 18:41:34,262 INFO L226 Difference]: Without dead ends: 1923 [2021-07-09 18:41:34,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:41:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-07-09 18:41:34,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-07-09 18:41:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-07-09 18:41:34,283 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-07-09 18:41:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:34,283 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-07-09 18:41:34,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-07-09 18:41:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:34,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:34,286 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:34,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:34,502 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:34,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1924122076, now seen corresponding path program 8 times [2021-07-09 18:41:34,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:34,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716681103] [2021-07-09 18:41:34,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:34,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716681103] [2021-07-09 18:41:34,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716681103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808112580] [2021-07-09 18:41:34,536 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:34,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:34,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:34,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:34,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:34,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:34,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808112580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:34,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:34,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:41:34,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855521662] [2021-07-09 18:41:34,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:34,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:34,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:34,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:34,614 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:34,779 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-07-09 18:41:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:34,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-07-09 18:41:34,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:34,783 INFO L225 Difference]: With dead ends: 2417 [2021-07-09 18:41:34,783 INFO L226 Difference]: Without dead ends: 2417 [2021-07-09 18:41:34,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-07-09 18:41:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-07-09 18:41:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-07-09 18:41:34,809 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-07-09 18:41:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:34,810 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-07-09 18:41:34,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-07-09 18:41:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:34,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:34,812 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:35,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:35,028 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash -782245740, now seen corresponding path program 9 times [2021-07-09 18:41:35,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:35,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679135600] [2021-07-09 18:41:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:35,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679135600] [2021-07-09 18:41:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679135600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508833526] [2021-07-09 18:41:35,074 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:35,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:41:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:35,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:35,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508833526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:35,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:41:35,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225039405] [2021-07-09 18:41:35,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:35,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:35,148 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:35,340 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-07-09 18:41:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:41:35,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-07-09 18:41:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:35,344 INFO L225 Difference]: With dead ends: 2191 [2021-07-09 18:41:35,344 INFO L226 Difference]: Without dead ends: 2170 [2021-07-09 18:41:35,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:41:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-07-09 18:41:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-07-09 18:41:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-07-09 18:41:35,386 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-07-09 18:41:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:35,387 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-07-09 18:41:35,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-07-09 18:41:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:35,389 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:35,389 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:35,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:35,605 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1171437904, now seen corresponding path program 10 times [2021-07-09 18:41:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:35,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596546896] [2021-07-09 18:41:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596546896] [2021-07-09 18:41:35,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596546896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970119766] [2021-07-09 18:41:35,636 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:35,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:35,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:35,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970119766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:35,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:35,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:41:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315873960] [2021-07-09 18:41:35,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:35,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:35,761 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:35,924 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-07-09 18:41:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:41:35,925 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:35,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:35,928 INFO L225 Difference]: With dead ends: 1790 [2021-07-09 18:41:35,928 INFO L226 Difference]: Without dead ends: 1790 [2021-07-09 18:41:35,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:41:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-07-09 18:41:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-07-09 18:41:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:35,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-07-09 18:41:35,947 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-07-09 18:41:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:35,947 INFO L482 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-07-09 18:41:35,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-07-09 18:41:35,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:35,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:35,949 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:36,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-09 18:41:36,165 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:36,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2112049896, now seen corresponding path program 11 times [2021-07-09 18:41:36,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:36,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630781835] [2021-07-09 18:41:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:36,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630781835] [2021-07-09 18:41:36,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630781835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471976127] [2021-07-09 18:41:36,188 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:36,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:36,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:36,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471976127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:36,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:41:36,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495757837] [2021-07-09 18:41:36,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:36,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:36,262 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:36,399 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-07-09 18:41:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:41:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-07-09 18:41:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:36,403 INFO L225 Difference]: With dead ends: 2556 [2021-07-09 18:41:36,403 INFO L226 Difference]: Without dead ends: 2556 [2021-07-09 18:41:36,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:41:36,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-07-09 18:41:36,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-07-09 18:41:36,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-07-09 18:41:36,475 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-07-09 18:41:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:36,475 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-07-09 18:41:36,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-07-09 18:41:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:36,478 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:36,478 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:36,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:41:36,694 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:36,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:36,694 INFO L82 PathProgramCache]: Analyzing trace with hash -523450416, now seen corresponding path program 12 times [2021-07-09 18:41:36,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:36,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019950999] [2021-07-09 18:41:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019950999] [2021-07-09 18:41:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019950999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220082549] [2021-07-09 18:41:36,722 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:36,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:41:36,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:41:36,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:36,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220082549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:36,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:36,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:41:36,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276137622] [2021-07-09 18:41:36,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:41:36,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:36,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:41:36,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:41:36,805 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:36,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:36,925 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-07-09 18:41:36,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:41:36,925 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 27 [2021-07-09 18:41:36,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:36,928 INFO L225 Difference]: With dead ends: 2232 [2021-07-09 18:41:36,928 INFO L226 Difference]: Without dead ends: 2211 [2021-07-09 18:41:36,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:41:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-07-09 18:41:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-07-09 18:41:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:36,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-07-09 18:41:36,953 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-07-09 18:41:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:36,953 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-07-09 18:41:36,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-07-09 18:41:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-07-09 18:41:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:36,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:36,956 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:37,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:41:37,171 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:37,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1318431600, now seen corresponding path program 17 times [2021-07-09 18:41:37,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:37,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822747088] [2021-07-09 18:41:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:37,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:37,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822747088] [2021-07-09 18:41:37,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822747088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:37,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264644665] [2021-07-09 18:41:37,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:37,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:37,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:37,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:37,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:37,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264644665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:37,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:37,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:37,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574316964] [2021-07-09 18:41:37,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:37,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:37,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:37,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:37,350 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:37,847 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-07-09 18:41:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:41:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:37,854 INFO L225 Difference]: With dead ends: 3478 [2021-07-09 18:41:37,854 INFO L226 Difference]: Without dead ends: 3478 [2021-07-09 18:41:37,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:41:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-07-09 18:41:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-07-09 18:41:37,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:37,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-07-09 18:41:37,891 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-07-09 18:41:37,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:37,891 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-07-09 18:41:37,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:37,891 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-07-09 18:41:37,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:37,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:37,894 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:38,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:41:38,110 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2050893036, now seen corresponding path program 18 times [2021-07-09 18:41:38,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:38,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163353862] [2021-07-09 18:41:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:38,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163353862] [2021-07-09 18:41:38,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163353862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543353029] [2021-07-09 18:41:38,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:38,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:38,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543353029] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:38,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:41:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967549850] [2021-07-09 18:41:38,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:41:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:41:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:41:38,223 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:38,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:38,680 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-07-09 18:41:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:41:38,680 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:38,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:38,685 INFO L225 Difference]: With dead ends: 3323 [2021-07-09 18:41:38,686 INFO L226 Difference]: Without dead ends: 3319 [2021-07-09 18:41:38,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:41:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-07-09 18:41:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-07-09 18:41:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-07-09 18:41:38,720 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-07-09 18:41:38,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:38,720 INFO L482 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-07-09 18:41:38,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:38,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-07-09 18:41:38,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:38,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:38,723 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:38,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:41:38,925 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash -173194000, now seen corresponding path program 19 times [2021-07-09 18:41:38,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:38,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426544701] [2021-07-09 18:41:38,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:38,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:38,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426544701] [2021-07-09 18:41:38,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426544701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:38,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964157776] [2021-07-09 18:41:38,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:39,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:39,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964157776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:39,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:39,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:41:39,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810808091] [2021-07-09 18:41:39,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:39,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:39,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:39,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:39,078 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:39,460 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-07-09 18:41:39,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:41:39,460 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:39,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:39,465 INFO L225 Difference]: With dead ends: 3041 [2021-07-09 18:41:39,465 INFO L226 Difference]: Without dead ends: 3029 [2021-07-09 18:41:39,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:41:39,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-07-09 18:41:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-07-09 18:41:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-07-09 18:41:39,499 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-07-09 18:41:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:39,499 INFO L482 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-07-09 18:41:39,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-07-09 18:41:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:39,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:39,502 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:39,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:39,718 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2106791024, now seen corresponding path program 20 times [2021-07-09 18:41:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:39,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047815554] [2021-07-09 18:41:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:39,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047815554] [2021-07-09 18:41:39,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047815554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:39,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231444910] [2021-07-09 18:41:39,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:39,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:39,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:39,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:39,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:39,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231444910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:39,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:39,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:41:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899335984] [2021-07-09 18:41:39,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:39,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:39,831 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:40,377 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-07-09 18:41:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:41:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:40,384 INFO L225 Difference]: With dead ends: 4165 [2021-07-09 18:41:40,384 INFO L226 Difference]: Without dead ends: 4165 [2021-07-09 18:41:40,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-07-09 18:41:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-07-09 18:41:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-07-09 18:41:40,472 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-07-09 18:41:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:40,472 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-07-09 18:41:40,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:40,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-07-09 18:41:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:40,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:40,475 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:40,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 18:41:40,689 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:40,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:40,690 INFO L82 PathProgramCache]: Analyzing trace with hash -729353744, now seen corresponding path program 21 times [2021-07-09 18:41:40,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:40,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200805541] [2021-07-09 18:41:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:40,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:40,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200805541] [2021-07-09 18:41:40,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200805541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008908827] [2021-07-09 18:41:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:40,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:41:40,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:40,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:40,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:40,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008908827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:40,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:40,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-07-09 18:41:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161749806] [2021-07-09 18:41:40,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:41:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:41:40,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:41:40,854 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:41,376 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-07-09 18:41:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:41:41,376 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:41,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:41,384 INFO L225 Difference]: With dead ends: 4184 [2021-07-09 18:41:41,384 INFO L226 Difference]: Without dead ends: 4184 [2021-07-09 18:41:41,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:41:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-07-09 18:41:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-07-09 18:41:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:41,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-07-09 18:41:41,455 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-07-09 18:41:41,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:41,455 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-07-09 18:41:41,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-07-09 18:41:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:41,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:41,458 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:41,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 18:41:41,673 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 21775592, now seen corresponding path program 22 times [2021-07-09 18:41:41,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:41,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323183611] [2021-07-09 18:41:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:41,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323183611] [2021-07-09 18:41:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323183611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180845163] [2021-07-09 18:41:41,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:41,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:41:41,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:41,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180845163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:41,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:41,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:41,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576978063] [2021-07-09 18:41:41,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:41,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:41,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:41,811 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:42,159 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-07-09 18:41:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:41:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:42,166 INFO L225 Difference]: With dead ends: 3911 [2021-07-09 18:41:42,166 INFO L226 Difference]: Without dead ends: 3907 [2021-07-09 18:41:42,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:41:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-07-09 18:41:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-07-09 18:41:42,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-07-09 18:41:42,211 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-07-09 18:41:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:42,211 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-07-09 18:41:42,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-07-09 18:41:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:42,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:42,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:42,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 18:41:42,431 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:42,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1000333036, now seen corresponding path program 23 times [2021-07-09 18:41:42,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:42,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618740937] [2021-07-09 18:41:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:42,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618740937] [2021-07-09 18:41:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618740937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593633303] [2021-07-09 18:41:42,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:42,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:41:42,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:42,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:42,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:41:42,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593633303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:42,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:42,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-09 18:41:42,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913589034] [2021-07-09 18:41:42,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:42,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:42,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:42,580 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:43,036 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-07-09 18:41:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:41:43,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:43,043 INFO L225 Difference]: With dead ends: 4058 [2021-07-09 18:41:43,043 INFO L226 Difference]: Without dead ends: 4058 [2021-07-09 18:41:43,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:41:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-07-09 18:41:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-07-09 18:41:43,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-07-09 18:41:43,103 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-07-09 18:41:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:43,103 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-07-09 18:41:43,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-07-09 18:41:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:43,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:43,106 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:43,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:43,322 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash 646145264, now seen corresponding path program 24 times [2021-07-09 18:41:43,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:43,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672208837] [2021-07-09 18:41:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:43,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:43,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672208837] [2021-07-09 18:41:43,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672208837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:43,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49313036] [2021-07-09 18:41:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:43,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:41:43,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:43,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:43,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49313036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:43,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:43,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:43,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424364389] [2021-07-09 18:41:43,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:43,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:43,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:43,437 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:43,768 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-07-09 18:41:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:41:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:43,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:43,774 INFO L225 Difference]: With dead ends: 3346 [2021-07-09 18:41:43,774 INFO L226 Difference]: Without dead ends: 3334 [2021-07-09 18:41:43,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:41:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-07-09 18:41:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-07-09 18:41:43,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-07-09 18:41:43,810 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-07-09 18:41:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:43,811 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-07-09 18:41:43,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-07-09 18:41:43,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:43,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:43,814 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:44,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:44,030 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:44,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:44,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1567847404, now seen corresponding path program 25 times [2021-07-09 18:41:44,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:44,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633216924] [2021-07-09 18:41:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:44,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633216924] [2021-07-09 18:41:44,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633216924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904617205] [2021-07-09 18:41:44,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:41:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904617205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:44,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:44,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342362022] [2021-07-09 18:41:44,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:44,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:44,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:44,160 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:44,589 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-07-09 18:41:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:41:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:44,595 INFO L225 Difference]: With dead ends: 3635 [2021-07-09 18:41:44,595 INFO L226 Difference]: Without dead ends: 3631 [2021-07-09 18:41:44,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 18:41:44,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-07-09 18:41:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-07-09 18:41:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-07-09 18:41:44,635 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-07-09 18:41:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:44,635 INFO L482 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-07-09 18:41:44,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-07-09 18:41:44,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-09 18:41:44,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:44,661 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:44,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:44,877 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:44,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1748562448, now seen corresponding path program 26 times [2021-07-09 18:41:44,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:44,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464752243] [2021-07-09 18:41:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:44,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464752243] [2021-07-09 18:41:44,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464752243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685433251] [2021-07-09 18:41:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:44,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:41:44,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:44,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:41:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:41:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:44,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685433251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:44,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:41:44,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:41:44,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298057441] [2021-07-09 18:41:44,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:41:44,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:41:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:41:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:41:44,984 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:45,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:41:45,470 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-07-09 18:41:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:41:45,470 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-09 18:41:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:41:45,476 INFO L225 Difference]: With dead ends: 3810 [2021-07-09 18:41:45,477 INFO L226 Difference]: Without dead ends: 3810 [2021-07-09 18:41:45,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:41:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-07-09 18:41:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-07-09 18:41:45,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-07-09 18:41:45,517 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-07-09 18:41:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:41:45,517 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-07-09 18:41:45,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:41:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-07-09 18:41:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:41:45,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:41:45,520 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:41:45,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 18:41:45,722 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:41:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:41:45,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2115287982, now seen corresponding path program 29 times [2021-07-09 18:41:45,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:41:45,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912179701] [2021-07-09 18:41:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:41:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:41:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:41:46,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:41:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912179701] [2021-07-09 18:41:46,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912179701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:41:46,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781694298] [2021-07-09 18:41:46,317 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:41:46,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:41:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:41:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:41:46,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:42:14,976 WARN L205 SmtUtils]: Spent 28.24 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-07-09 18:42:15,249 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_15], 7=[A, v_prenex_25, v_prenex_17], 9=[v_prenex_23], 12=[v_prenex_19, v_prenex_21, v_prenex_20, v_prenex_14, v_prenex_13]} [2021-07-09 18:42:15,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:15,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-07-09 18:42:15,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:15,451 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-07-09 18:42:15,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,485 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-07-09 18:42:15,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 30 [2021-07-09 18:42:15,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:15,650 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2021-07-09 18:42:15,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:15,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:15,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 56 [2021-07-09 18:42:15,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:15,851 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2021-07-09 18:42:15,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:15,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:15,918 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-07-09 18:42:15,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-07-09 18:42:15,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,073 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-07-09 18:42:16,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,108 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-07-09 18:42:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-07-09 18:42:16,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,256 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-07-09 18:42:16,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,314 INFO L354 Elim1Store]: treesize reduction 12, result has 78.9 percent of original size [2021-07-09 18:42:16,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-07-09 18:42:16,327 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,461 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2021-07-09 18:42:16,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,502 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-07-09 18:42:16,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:42:16,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,625 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-07-09 18:42:16,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,661 INFO L354 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2021-07-09 18:42:16,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2021-07-09 18:42:16,663 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,782 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-07-09 18:42:16,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,824 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-07-09 18:42:16,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:42:16,833 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:16,940 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-07-09 18:42:16,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:42:16,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:16,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-07-09 18:42:16,991 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:42:17,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:42:17,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 10 dim-0 vars, 10 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-07-09 18:42:17,094 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 20 variables, input treesize:432, output treesize:135 [2021-07-09 18:42:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:42:17,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781694298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:42:17,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:42:17,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2021-07-09 18:42:17,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373075883] [2021-07-09 18:42:17,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:42:17,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:42:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:42:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:42:17,210 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:42:17,815 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-07-09 18:42:18,146 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-07-09 18:42:18,577 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-07-09 18:42:19,049 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-07-09 18:42:27,859 WARN L205 SmtUtils]: Spent 8.29 s on a formula simplification. DAG size of input: 89 DAG size of output: 58 [2021-07-09 18:42:56,183 WARN L205 SmtUtils]: Spent 28.26 s on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 18:43:24,910 WARN L205 SmtUtils]: Spent 28.28 s on a formula simplification. DAG size of input: 77 DAG size of output: 66 [2021-07-09 18:43:25,124 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-07-09 18:43:25,309 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-07-09 18:43:25,549 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-09 18:43:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:28,193 INFO L93 Difference]: Finished difference Result 2587 states and 8784 transitions. [2021-07-09 18:43:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:43:28,194 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:43:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:28,199 INFO L225 Difference]: With dead ends: 2587 [2021-07-09 18:43:28,199 INFO L226 Difference]: Without dead ends: 2572 [2021-07-09 18:43:28,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1243 ImplicationChecksByTransitivity, 96995.8ms TimeCoverageRelationStatistics Valid=855, Invalid=3567, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:43:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-07-09 18:43:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2119. [2021-07-09 18:43:28,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-07-09 18:43:28,231 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-07-09 18:43:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:28,231 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-07-09 18:43:28,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-07-09 18:43:28,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:43:28,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:28,234 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:28,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:43:28,449 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash -47808706, now seen corresponding path program 30 times [2021-07-09 18:43:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:28,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443395134] [2021-07-09 18:43:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:28,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443395134] [2021-07-09 18:43:28,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443395134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:28,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843008764] [2021-07-09 18:43:28,814 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:28,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:43:28,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:28,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:43:28,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:29,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 18:43:29,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,209 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-07-09 18:43:29,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 28 [2021-07-09 18:43:29,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,247 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-07-09 18:43:29,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 26 [2021-07-09 18:43:29,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:29,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-07-09 18:43:29,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,320 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:43:29,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,344 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-07-09 18:43:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 19 [2021-07-09 18:43:29,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:43:29,348 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:29,373 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:43:29,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-07-09 18:43:29,375 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:43:29,383 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:29,431 INFO L628 ElimStorePlain]: treesize reduction 56, result has 38.5 percent of original size [2021-07-09 18:43:29,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:43:29,432 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:35 [2021-07-09 18:43:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:29,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843008764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:29,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:29,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-09 18:43:29,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269167387] [2021-07-09 18:43:29,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:43:29,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:29,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:43:29,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:43:29,518 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:32,000 INFO L93 Difference]: Finished difference Result 3291 states and 11148 transitions. [2021-07-09 18:43:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:43:32,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:43:32,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:32,006 INFO L225 Difference]: With dead ends: 3291 [2021-07-09 18:43:32,006 INFO L226 Difference]: Without dead ends: 3234 [2021-07-09 18:43:32,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2482.9ms TimeCoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:43:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-07-09 18:43:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2177. [2021-07-09 18:43:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.5091911764705883) internal successors, (7636), 2176 states have internal predecessors, (7636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7636 transitions. [2021-07-09 18:43:32,040 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7636 transitions. Word has length 29 [2021-07-09 18:43:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:32,040 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 7636 transitions. [2021-07-09 18:43:32,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7636 transitions. [2021-07-09 18:43:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:43:32,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:32,043 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:32,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:32,259 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:32,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:32,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1876233986, now seen corresponding path program 31 times [2021-07-09 18:43:32,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:32,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450836894] [2021-07-09 18:43:32,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:32,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:32,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450836894] [2021-07-09 18:43:32,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450836894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:32,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945483687] [2021-07-09 18:43:32,571 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:32,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:43:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,043 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:43:33,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:43:33,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:43:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-07-09 18:43:33,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,135 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-07-09 18:43:33,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-07-09 18:43:33,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,191 INFO L354 Elim1Store]: treesize reduction 22, result has 61.4 percent of original size [2021-07-09 18:43:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 47 [2021-07-09 18:43:33,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2021-07-09 18:43:33,210 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:43:33,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:43:33,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:43:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:43:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-07-09 18:43:33,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:43:33,237 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:43:33,304 INFO L628 ElimStorePlain]: treesize reduction 44, result has 53.2 percent of original size [2021-07-09 18:43:33,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:43:33,305 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:367, output treesize:34 [2021-07-09 18:43:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:33,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945483687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:33,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:33,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:43:33,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874413736] [2021-07-09 18:43:33,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:43:33,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:33,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:43:33,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:43:33,389 INFO L87 Difference]: Start difference. First operand 2177 states and 7636 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:35,338 INFO L93 Difference]: Finished difference Result 3600 states and 12115 transitions. [2021-07-09 18:43:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:43:35,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:43:35,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:35,346 INFO L225 Difference]: With dead ends: 3600 [2021-07-09 18:43:35,346 INFO L226 Difference]: Without dead ends: 3556 [2021-07-09 18:43:35,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2048.9ms TimeCoverageRelationStatistics Valid=683, Invalid=2739, Unknown=0, NotChecked=0, Total=3422 [2021-07-09 18:43:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-07-09 18:43:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2245. [2021-07-09 18:43:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-07-09 18:43:35,395 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-07-09 18:43:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:35,395 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-07-09 18:43:35,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-07-09 18:43:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:43:35,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:35,400 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:35,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:35,616 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1584110280, now seen corresponding path program 32 times [2021-07-09 18:43:35,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:35,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541162221] [2021-07-09 18:43:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:35,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:35,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541162221] [2021-07-09 18:43:35,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541162221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:35,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092379588] [2021-07-09 18:43:35,980 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:36,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:43:36,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:43:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:43:36,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092379588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:36,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:36,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:43:36,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724125361] [2021-07-09 18:43:36,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:43:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:43:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:43:36,489 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:38,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:43:38,061 INFO L93 Difference]: Finished difference Result 3142 states and 10717 transitions. [2021-07-09 18:43:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:43:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:43:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:43:38,067 INFO L225 Difference]: With dead ends: 3142 [2021-07-09 18:43:38,067 INFO L226 Difference]: Without dead ends: 3112 [2021-07-09 18:43:38,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1650.1ms TimeCoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:43:38,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-07-09 18:43:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 2245. [2021-07-09 18:43:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.5062388591800357) internal successors, (7868), 2244 states have internal predecessors, (7868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:38,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 7868 transitions. [2021-07-09 18:43:38,134 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 7868 transitions. Word has length 29 [2021-07-09 18:43:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:43:38,135 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 7868 transitions. [2021-07-09 18:43:38,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:38,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 7868 transitions. [2021-07-09 18:43:38,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:43:38,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:43:38,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:43:38,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:38,352 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:43:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:43:38,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1619613102, now seen corresponding path program 13 times [2021-07-09 18:43:38,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:43:38,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823182827] [2021-07-09 18:43:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:43:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:38,603 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-07-09 18:43:38,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:38,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:43:38,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823182827] [2021-07-09 18:43:38,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823182827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:38,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481889109] [2021-07-09 18:43:38,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:43:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:43:38,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:43:38,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:43:39,850 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-07-09 18:43:40,105 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2021-07-09 18:43:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:43:40,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481889109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:43:40,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:43:40,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-07-09 18:43:40,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414445360] [2021-07-09 18:43:40,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:43:40,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:43:40,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:43:40,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:43:40,191 INFO L87 Difference]: Start difference. First operand 2245 states and 7868 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:43:42,867 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-09 18:44:07,999 WARN L205 SmtUtils]: Spent 24.80 s on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2021-07-09 18:44:10,152 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-07-09 18:44:14,400 WARN L205 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-07-09 18:44:29,159 WARN L205 SmtUtils]: Spent 14.20 s on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-09 18:44:37,388 WARN L205 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-07-09 18:44:37,655 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-07-09 18:44:37,945 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2021-07-09 18:44:38,417 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2021-07-09 18:44:38,702 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2021-07-09 18:44:38,900 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 60 [2021-07-09 18:44:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:44:39,202 INFO L93 Difference]: Finished difference Result 3710 states and 12255 transitions. [2021-07-09 18:44:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:44:39,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:44:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:44:39,209 INFO L225 Difference]: With dead ends: 3710 [2021-07-09 18:44:39,209 INFO L226 Difference]: Without dead ends: 3695 [2021-07-09 18:44:39,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 59376.0ms TimeCoverageRelationStatistics Valid=782, Invalid=3250, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:44:39,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-07-09 18:44:39,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2255. [2021-07-09 18:44:39,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 3.503549245785271) internal successors, (7897), 2254 states have internal predecessors, (7897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 7897 transitions. [2021-07-09 18:44:39,247 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 7897 transitions. Word has length 29 [2021-07-09 18:44:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:44:39,247 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 7897 transitions. [2021-07-09 18:44:39,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 7897 transitions. [2021-07-09 18:44:39,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:44:39,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:44:39,250 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:44:39,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:39,465 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:44:39,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:44:39,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1969180942, now seen corresponding path program 14 times [2021-07-09 18:44:39,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:44:39,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057622800] [2021-07-09 18:44:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:44:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:44:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:39,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:44:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057622800] [2021-07-09 18:44:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057622800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837807874] [2021-07-09 18:44:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:44:39,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:44:39,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:44:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:44:39,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:44:41,995 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 28 [2021-07-09 18:44:42,684 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2021-07-09 18:44:42,761 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_41, v_prenex_39], 7=[A, v_prenex_43, v_prenex_42, v_prenex_40]} [2021-07-09 18:44:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:42,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:44:42,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:42,919 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-09 18:44:42,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:42,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:42,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:42,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:44:42,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,079 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:44:43,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:44:43,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:44:43,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,369 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 79 [2021-07-09 18:44:43,370 INFO L628 ElimStorePlain]: treesize reduction 24, result has 91.0 percent of original size [2021-07-09 18:44:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,394 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:44:43,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:44:43,395 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,525 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:44:43,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:44:43,526 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,549 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:44:43,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:44:43,551 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,679 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-07-09 18:44:43,679 INFO L628 ElimStorePlain]: treesize reduction 27, result has 85.5 percent of original size [2021-07-09 18:44:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:44:43,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:44:43,707 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:44:43,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:44:43,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:44:43,764 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-07-09 18:44:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:44:43,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837807874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:44:43,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:44:43,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:44:43,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007855379] [2021-07-09 18:44:43,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:44:43,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:44:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:44:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:44:43,902 INFO L87 Difference]: Start difference. First operand 2255 states and 7897 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:44:44,521 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-07-09 18:44:59,564 WARN L205 SmtUtils]: Spent 14.65 s on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-07-09 18:45:03,945 WARN L205 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2021-07-09 18:45:30,627 WARN L205 SmtUtils]: Spent 26.46 s on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2021-07-09 18:45:30,981 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-07-09 18:45:31,481 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2021-07-09 18:45:31,762 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-07-09 18:45:31,944 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-07-09 18:45:32,444 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-07-09 18:45:32,881 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2021-07-09 18:45:33,401 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-09 18:45:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:33,558 INFO L93 Difference]: Finished difference Result 4143 states and 13701 transitions. [2021-07-09 18:45:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:45:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:45:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:33,566 INFO L225 Difference]: With dead ends: 4143 [2021-07-09 18:45:33,566 INFO L226 Difference]: Without dead ends: 4113 [2021-07-09 18:45:33,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 51925.4ms TimeCoverageRelationStatistics Valid=809, Invalid=3481, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:45:33,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-07-09 18:45:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 2272. [2021-07-09 18:45:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 3.5055041831792164) internal successors, (7961), 2271 states have internal predecessors, (7961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 7961 transitions. [2021-07-09 18:45:33,605 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 7961 transitions. Word has length 29 [2021-07-09 18:45:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:33,605 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 7961 transitions. [2021-07-09 18:45:33,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:33,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 7961 transitions. [2021-07-09 18:45:33,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:45:33,608 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:33,608 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:33,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 18:45:33,825 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:33,825 INFO L82 PathProgramCache]: Analyzing trace with hash -580502318, now seen corresponding path program 15 times [2021-07-09 18:45:33,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:33,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997816656] [2021-07-09 18:45:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:34,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997816656] [2021-07-09 18:45:34,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997816656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:34,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617805140] [2021-07-09 18:45:34,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:34,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:45:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:34,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:45:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:34,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:45:34,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:34,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:35,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 88 [2021-07-09 18:45:35,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-07-09 18:45:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,147 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-07-09 18:45:35,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-07-09 18:45:35,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,240 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-07-09 18:45:35,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 74 [2021-07-09 18:45:35,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:35,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:45:35,288 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,382 INFO L354 Elim1Store]: treesize reduction 16, result has 79.7 percent of original size [2021-07-09 18:45:35,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 72 [2021-07-09 18:45:35,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,437 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-07-09 18:45:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 13 [2021-07-09 18:45:35,438 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:45:35,443 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:35,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:45:35,527 INFO L354 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2021-07-09 18:45:35,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 35 treesize of output 62 [2021-07-09 18:45:35,538 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,542 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:45:35,543 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:35,721 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-07-09 18:45:35,721 INFO L628 ElimStorePlain]: treesize reduction 219, result has 44.6 percent of original size [2021-07-09 18:45:35,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-09 18:45:35,724 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:632, output treesize:216 [2021-07-09 18:45:35,888 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-07-09 18:45:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:35,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617805140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:35,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:35,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-07-09 18:45:35,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840780396] [2021-07-09 18:45:35,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:45:35,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:35,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:45:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:45:35,957 INFO L87 Difference]: Start difference. First operand 2272 states and 7961 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:37,644 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-07-09 18:45:38,076 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-07-09 18:45:38,414 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-07-09 18:45:38,534 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-09 18:45:38,693 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2021-07-09 18:45:39,012 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-07-09 18:45:39,152 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-07-09 18:45:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:39,257 INFO L93 Difference]: Finished difference Result 3440 states and 11411 transitions. [2021-07-09 18:45:39,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:45:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:45:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:39,264 INFO L225 Difference]: With dead ends: 3440 [2021-07-09 18:45:39,264 INFO L226 Difference]: Without dead ends: 3375 [2021-07-09 18:45:39,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 3602.6ms TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:45:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3375 states. [2021-07-09 18:45:39,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3375 to 2300. [2021-07-09 18:45:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.4993475424097435) internal successors, (8045), 2299 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8045 transitions. [2021-07-09 18:45:39,301 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8045 transitions. Word has length 29 [2021-07-09 18:45:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:39,301 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 8045 transitions. [2021-07-09 18:45:39,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8045 transitions. [2021-07-09 18:45:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:45:39,305 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:39,305 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:39,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:39,520 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -517413926, now seen corresponding path program 16 times [2021-07-09 18:45:39,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:39,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631735455] [2021-07-09 18:45:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:39,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:39,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631735455] [2021-07-09 18:45:39,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631735455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:39,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586276308] [2021-07-09 18:45:39,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:39,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:45:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:45:39,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586276308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:40,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:40,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:45:40,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017441951] [2021-07-09 18:45:40,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:45:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:45:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:45:40,408 INFO L87 Difference]: Start difference. First operand 2300 states and 8045 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:41,414 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2021-07-09 18:45:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:45:41,637 INFO L93 Difference]: Finished difference Result 3205 states and 10722 transitions. [2021-07-09 18:45:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:45:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:45:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:45:41,643 INFO L225 Difference]: With dead ends: 3205 [2021-07-09 18:45:41,643 INFO L226 Difference]: Without dead ends: 3190 [2021-07-09 18:45:41,643 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1542.0ms TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:45:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-07-09 18:45:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2296. [2021-07-09 18:45:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.5002178649237474) internal successors, (8033), 2295 states have internal predecessors, (8033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8033 transitions. [2021-07-09 18:45:41,679 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8033 transitions. Word has length 29 [2021-07-09 18:45:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:45:41,679 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8033 transitions. [2021-07-09 18:45:41,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8033 transitions. [2021-07-09 18:45:41,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:45:41,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:45:41,683 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:45:41,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-09 18:45:41,898 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:45:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:45:41,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1600210838, now seen corresponding path program 17 times [2021-07-09 18:45:41,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:45:41,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446923172] [2021-07-09 18:45:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:45:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:45:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:42,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:45:42,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446923172] [2021-07-09 18:45:42,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446923172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:42,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246272911] [2021-07-09 18:45:42,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:45:42,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:45:42,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:45:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:45:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:45:43,150 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_51, v_prenex_55], 7=[v_prenex_50, A, v_prenex_54, v_prenex_52, v_prenex_58, v_prenex_57]} [2021-07-09 18:45:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:45:43,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,309 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-07-09 18:45:43,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:45:43,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,461 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-07-09 18:45:43,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,492 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:45:43,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:45:43,495 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,623 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-07-09 18:45:43,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:45:43,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,778 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-07-09 18:45:43,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,812 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:45:43,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:45:43,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:43,926 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-07-09 18:45:43,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:43,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:43,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:45:43,962 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:44,067 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-07-09 18:45:44,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:44,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:45:44,104 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:44,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:44,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:45:44,230 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:45:44,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:45:44,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:45:44,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:45:44,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 18:45:44,329 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:345, output treesize:103 [2021-07-09 18:45:44,500 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2021-07-09 18:45:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:45:44,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246272911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:45:44,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:45:44,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:45:44,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541925232] [2021-07-09 18:45:44,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:45:44,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:45:44,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:45:44,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:45:44,517 INFO L87 Difference]: Start difference. First operand 2296 states and 8033 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:45:53,114 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-07-09 18:46:29,950 WARN L205 SmtUtils]: Spent 36.52 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-07-09 18:46:38,128 WARN L205 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-09 18:47:10,621 WARN L205 SmtUtils]: Spent 32.30 s on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-07-09 18:47:11,208 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-07-09 18:47:11,443 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2021-07-09 18:47:11,715 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-07-09 18:47:12,000 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-07-09 18:47:12,460 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79 [2021-07-09 18:47:12,761 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-07-09 18:47:12,966 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-07-09 18:47:13,319 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 91 [2021-07-09 18:47:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:13,618 INFO L93 Difference]: Finished difference Result 3169 states and 10683 transitions. [2021-07-09 18:47:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:47:13,619 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:47:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:13,625 INFO L225 Difference]: With dead ends: 3169 [2021-07-09 18:47:13,625 INFO L226 Difference]: Without dead ends: 3115 [2021-07-09 18:47:13,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 89000.0ms TimeCoverageRelationStatistics Valid=458, Invalid=2734, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:47:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-07-09 18:47:13,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2316. [2021-07-09 18:47:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 3.498488120950324) internal successors, (8099), 2315 states have internal predecessors, (8099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 8099 transitions. [2021-07-09 18:47:13,662 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 8099 transitions. Word has length 29 [2021-07-09 18:47:13,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:13,662 INFO L482 AbstractCegarLoop]: Abstraction has 2316 states and 8099 transitions. [2021-07-09 18:47:13,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:13,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 8099 transitions. [2021-07-09 18:47:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:47:13,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:13,665 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:13,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:13,870 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2024544714, now seen corresponding path program 18 times [2021-07-09 18:47:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:13,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144186657] [2021-07-09 18:47:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:14,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144186657] [2021-07-09 18:47:14,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144186657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984105252] [2021-07-09 18:47:14,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:14,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:47:14,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:47:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:47:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:14,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984105252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:14,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:14,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-07-09 18:47:14,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505392993] [2021-07-09 18:47:14,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:47:14,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:14,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:47:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:47:14,648 INFO L87 Difference]: Start difference. First operand 2316 states and 8099 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:15,268 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-07-09 18:47:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:47:15,385 INFO L93 Difference]: Finished difference Result 2857 states and 9771 transitions. [2021-07-09 18:47:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:47:15,385 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:47:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:47:15,391 INFO L225 Difference]: With dead ends: 2857 [2021-07-09 18:47:15,391 INFO L226 Difference]: Without dead ends: 2842 [2021-07-09 18:47:15,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1004.5ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:47:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-07-09 18:47:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2306. [2021-07-09 18:47:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2305 states have (on average 3.5010845986984815) internal successors, (8070), 2305 states have internal predecessors, (8070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 8070 transitions. [2021-07-09 18:47:15,426 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 8070 transitions. Word has length 29 [2021-07-09 18:47:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:47:15,426 INFO L482 AbstractCegarLoop]: Abstraction has 2306 states and 8070 transitions. [2021-07-09 18:47:15,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 8070 transitions. [2021-07-09 18:47:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:47:15,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:47:15,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:47:15,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-07-09 18:47:15,645 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:47:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:47:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1418429486, now seen corresponding path program 19 times [2021-07-09 18:47:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:47:15,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178986656] [2021-07-09 18:47:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:47:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:15,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:47:15,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178986656] [2021-07-09 18:47:15,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178986656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:15,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494976421] [2021-07-09 18:47:15,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:47:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:47:16,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:47:16,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:47:20,324 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 39 [2021-07-09 18:47:24,440 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 58 [2021-07-09 18:47:24,629 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_70, v_prenex_67], 7=[A, v_prenex_74, v_prenex_73, v_prenex_69, v_prenex_68, v_prenex_77]} [2021-07-09 18:47:24,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:47:24,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:24,769 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-07-09 18:47:24,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,786 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:47:24,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:24,900 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-07-09 18:47:24,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:24,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:24,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:47:24,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:25,039 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-07-09 18:47:25,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,065 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:47:25,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:47:25,066 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:25,167 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-07-09 18:47:25,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,194 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:47:25,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:47:25,195 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:25,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:47:25,344 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:25,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,454 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:47:25,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:47:25,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:25,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:47:25,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:47:25,569 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:47:25,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:47:25,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-09 18:47:25,648 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:305, output treesize:91 [2021-07-09 18:47:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:47:25,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494976421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:47:25,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:47:25,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-07-09 18:47:25,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376647620] [2021-07-09 18:47:25,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:47:25,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:47:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:47:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:47:25,755 INFO L87 Difference]: Start difference. First operand 2306 states and 8070 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:47:36,530 WARN L205 SmtUtils]: Spent 10.19 s on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2021-07-09 18:47:47,674 WARN L205 SmtUtils]: Spent 10.92 s on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-07-09 18:47:58,182 WARN L205 SmtUtils]: Spent 8.17 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-07-09 18:48:06,576 WARN L205 SmtUtils]: Spent 8.36 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-07-09 18:48:22,961 WARN L205 SmtUtils]: Spent 14.29 s on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2021-07-09 18:48:35,267 WARN L205 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-09 18:48:41,660 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-07-09 18:48:41,813 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-07-09 18:48:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:42,081 INFO L93 Difference]: Finished difference Result 3233 states and 11042 transitions. [2021-07-09 18:48:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:48:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:48:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:42,088 INFO L225 Difference]: With dead ends: 3233 [2021-07-09 18:48:42,088 INFO L226 Difference]: Without dead ends: 3218 [2021-07-09 18:48:42,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 74097.7ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:48:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3218 states. [2021-07-09 18:48:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3218 to 2318. [2021-07-09 18:48:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 3.503668536901165) internal successors, (8118), 2317 states have internal predecessors, (8118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 8118 transitions. [2021-07-09 18:48:42,127 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 8118 transitions. Word has length 29 [2021-07-09 18:48:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:42,127 INFO L482 AbstractCegarLoop]: Abstraction has 2318 states and 8118 transitions. [2021-07-09 18:48:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 8118 transitions. [2021-07-09 18:48:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:48:42,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:42,131 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:42,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:42,346 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:42,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:42,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1099848014, now seen corresponding path program 33 times [2021-07-09 18:48:42,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:42,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774764282] [2021-07-09 18:48:42,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:42,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774764282] [2021-07-09 18:48:42,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774764282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:42,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654869580] [2021-07-09 18:48:42,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:42,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:48:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:42,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:48:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,100 INFO L354 Elim1Store]: treesize reduction 24, result has 59.3 percent of original size [2021-07-09 18:48:43,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 47 [2021-07-09 18:48:43,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:43,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-09 18:48:43,148 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,197 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 71 [2021-07-09 18:48:43,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:48:43,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,267 INFO L354 Elim1Store]: treesize reduction 38, result has 35.6 percent of original size [2021-07-09 18:48:43,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 33 [2021-07-09 18:48:43,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:48:43,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:48:43,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:48:43,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:48:43,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2021-07-09 18:48:43,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:43,310 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-07-09 18:48:43,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-07-09 18:48:43,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:48:43,315 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,317 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:48:43,318 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:43,382 INFO L628 ElimStorePlain]: treesize reduction 43, result has 50.6 percent of original size [2021-07-09 18:48:43,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:48:43,383 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:388, output treesize:34 [2021-07-09 18:48:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:43,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654869580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:43,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:43,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:48:43,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302238913] [2021-07-09 18:48:43,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:48:43,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:43,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:48:43,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:48:43,449 INFO L87 Difference]: Start difference. First operand 2318 states and 8118 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:45,885 INFO L93 Difference]: Finished difference Result 4037 states and 13530 transitions. [2021-07-09 18:48:45,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:48:45,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:48:45,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:45,893 INFO L225 Difference]: With dead ends: 4037 [2021-07-09 18:48:45,894 INFO L226 Difference]: Without dead ends: 3993 [2021-07-09 18:48:45,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2309.8ms TimeCoverageRelationStatistics Valid=657, Invalid=2535, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:48:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-07-09 18:48:45,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 2466. [2021-07-09 18:48:45,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.5030425963488843) internal successors, (8635), 2465 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8635 transitions. [2021-07-09 18:48:45,941 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8635 transitions. Word has length 29 [2021-07-09 18:48:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:45,941 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8635 transitions. [2021-07-09 18:48:45,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8635 transitions. [2021-07-09 18:48:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:48:45,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:45,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-07-09 18:48:46,160 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:46,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:46,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1934471044, now seen corresponding path program 34 times [2021-07-09 18:48:46,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:46,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872491013] [2021-07-09 18:48:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:46,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872491013] [2021-07-09 18:48:46,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872491013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:46,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463489548] [2021-07-09 18:48:46,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:46,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:48:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 18:48:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:46,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463489548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:46,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:46,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-07-09 18:48:46,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11175398] [2021-07-09 18:48:46,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:48:46,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:46,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:48:46,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:48:46,963 INFO L87 Difference]: Start difference. First operand 2466 states and 8635 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:48:48,661 INFO L93 Difference]: Finished difference Result 3644 states and 12305 transitions. [2021-07-09 18:48:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:48:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:48:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:48:48,668 INFO L225 Difference]: With dead ends: 3644 [2021-07-09 18:48:48,668 INFO L226 Difference]: Without dead ends: 3600 [2021-07-09 18:48:48,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1753.2ms TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:48:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2021-07-09 18:48:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2454. [2021-07-09 18:48:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2454 states, 2453 states have (on average 3.5026498165511617) internal successors, (8592), 2453 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2454 states to 2454 states and 8592 transitions. [2021-07-09 18:48:48,707 INFO L78 Accepts]: Start accepts. Automaton has 2454 states and 8592 transitions. Word has length 29 [2021-07-09 18:48:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:48:48,707 INFO L482 AbstractCegarLoop]: Abstraction has 2454 states and 8592 transitions. [2021-07-09 18:48:48,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2454 states and 8592 transitions. [2021-07-09 18:48:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:48:48,711 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:48:48,711 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:48:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:48,925 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:48:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:48:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1316037810, now seen corresponding path program 20 times [2021-07-09 18:48:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:48:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861155822] [2021-07-09 18:48:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:48:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:48:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:49,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:48:49,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861155822] [2021-07-09 18:48:49,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861155822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:49,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111371931] [2021-07-09 18:48:49,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:48:49,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:48:49,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:48:49,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:48:49,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:48:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,964 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:48:49,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:48:49,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,981 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:48:49,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-07-09 18:48:49,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:48:50,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,021 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-07-09 18:48:50,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:48:50,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,023 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:48:50,024 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,049 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:48:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:48:50,050 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,076 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:48:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:48:50,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:50,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:48:50,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,127 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:48:50,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-07-09 18:48:50,128 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,147 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-07-09 18:48:50,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-07-09 18:48:50,147 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:50,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:48:50,161 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:48:50,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:48:50,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:48:50,201 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-09 18:48:50,280 INFO L628 ElimStorePlain]: treesize reduction 33, result has 57.7 percent of original size [2021-07-09 18:48:50,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-09 18:48:50,281 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:431, output treesize:45 [2021-07-09 18:48:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:48:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111371931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:48:50,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:48:50,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2021-07-09 18:48:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384954541] [2021-07-09 18:48:50,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:48:50,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:48:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:48:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:48:50,352 INFO L87 Difference]: Start difference. First operand 2454 states and 8592 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:48:51,175 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2021-07-09 18:48:51,379 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2021-07-09 18:48:51,503 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-07-09 18:48:51,656 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2021-07-09 18:48:51,929 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-09 18:48:52,300 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2021-07-09 18:48:52,506 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-07-09 18:48:52,852 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-07-09 18:48:53,017 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-07-09 18:48:53,786 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-07-09 18:48:54,071 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 18:48:54,226 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-07-09 18:48:54,410 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 47 [2021-07-09 18:48:54,602 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-07-09 18:48:55,350 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2021-07-09 18:48:55,583 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2021-07-09 18:48:55,853 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-07-09 18:48:56,185 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 73 [2021-07-09 18:48:56,348 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-07-09 18:48:56,621 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-07-09 18:48:56,891 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2021-07-09 18:48:57,122 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-07-09 18:48:57,391 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2021-07-09 18:48:58,252 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-09 18:48:58,393 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-09 18:48:58,687 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-07-09 18:48:58,947 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-07-09 18:48:59,446 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-09 18:48:59,602 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-07-09 18:48:59,809 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 62 [2021-07-09 18:49:00,034 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-07-09 18:49:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:00,159 INFO L93 Difference]: Finished difference Result 4608 states and 15272 transitions. [2021-07-09 18:49:00,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-07-09 18:49:00,160 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:49:00,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:00,168 INFO L225 Difference]: With dead ends: 4608 [2021-07-09 18:49:00,168 INFO L226 Difference]: Without dead ends: 4593 [2021-07-09 18:49:00,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 8797.7ms TimeCoverageRelationStatistics Valid=908, Invalid=7648, Unknown=0, NotChecked=0, Total=8556 [2021-07-09 18:49:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4593 states. [2021-07-09 18:49:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4593 to 2453. [2021-07-09 18:49:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 3.504078303425775) internal successors, (8592), 2452 states have internal predecessors, (8592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 8592 transitions. [2021-07-09 18:49:00,223 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 8592 transitions. Word has length 29 [2021-07-09 18:49:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:00,224 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 8592 transitions. [2021-07-09 18:49:00,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 8592 transitions. [2021-07-09 18:49:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:49:00,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:00,241 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:00,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-07-09 18:49:00,442 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1804724658, now seen corresponding path program 21 times [2021-07-09 18:49:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:00,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699058038] [2021-07-09 18:49:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:01,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:01,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:01,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699058038] [2021-07-09 18:49:01,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699058038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:01,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700995221] [2021-07-09 18:49:01,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:01,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:49:01,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:49:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:45,930 WARN L205 SmtUtils]: Spent 44.39 s on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-09 18:49:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:49:46,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:46,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,141 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:46,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:49:46,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:46,202 INFO L628 ElimStorePlain]: treesize reduction 15, result has 81.3 percent of original size [2021-07-09 18:49:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:46,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:49:46,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:46,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:46,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:46,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:49:46,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:46,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:46,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:49:46,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:112, output treesize:33 [2021-07-09 18:49:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700995221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:46,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:49:46,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-07-09 18:49:46,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088444301] [2021-07-09 18:49:46,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:49:46,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:49:46,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:49:46,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:49:46,335 INFO L87 Difference]: Start difference. First operand 2453 states and 8592 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:47,398 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-07-09 18:49:48,106 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-07-09 18:49:48,346 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-09 18:49:49,463 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2021-07-09 18:49:49,693 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-09 18:49:49,837 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2021-07-09 18:49:49,983 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2021-07-09 18:49:50,983 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-07-09 18:49:51,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:49:51,095 INFO L93 Difference]: Finished difference Result 4353 states and 14593 transitions. [2021-07-09 18:49:51,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:49:51,096 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:49:51,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:49:51,104 INFO L225 Difference]: With dead ends: 4353 [2021-07-09 18:49:51,104 INFO L226 Difference]: Without dead ends: 4323 [2021-07-09 18:49:51,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 48846.2ms TimeCoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:49:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4323 states. [2021-07-09 18:49:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4323 to 2463. [2021-07-09 18:49:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 3.500812347684809) internal successors, (8619), 2462 states have internal predecessors, (8619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 8619 transitions. [2021-07-09 18:49:51,188 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 8619 transitions. Word has length 29 [2021-07-09 18:49:51,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:49:51,188 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 8619 transitions. [2021-07-09 18:49:51,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:49:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 8619 transitions. [2021-07-09 18:49:51,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:49:51,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:49:51,191 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:49:51,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable742,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:51,392 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:49:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:49:51,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1829857094, now seen corresponding path program 22 times [2021-07-09 18:49:51,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:49:51,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866167207] [2021-07-09 18:49:51,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:49:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:49:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:49:51,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:49:51,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866167207] [2021-07-09 18:49:51,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866167207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:49:51,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060659842] [2021-07-09 18:49:51,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:49:52,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:49:52,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:49:52,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:49:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:49:58,311 WARN L205 SmtUtils]: Spent 6.12 s on a formula simplification that was a NOOP. DAG size: 61 [2021-07-09 18:49:58,990 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 89 [2021-07-09 18:49:59,086 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_93, v_prenex_91], 7=[v_prenex_94, A, v_prenex_92, v_prenex_90]} [2021-07-09 18:49:59,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:59,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:49:59,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:59,360 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-07-09 18:49:59,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:49:59,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:59,577 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:49:59,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:59,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:49:59,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:59,739 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-07-09 18:49:59,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:49:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,773 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:49:59,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:49:59,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:49:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:49:59,799 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:49:59,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:49:59,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:00,015 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 18:50:00,016 INFO L628 ElimStorePlain]: treesize reduction 27, result has 89.3 percent of original size [2021-07-09 18:50:00,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,042 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:50:00,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:50:00,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:00,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:00,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:50:00,183 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:50:00,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:50:00,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:50:00,208 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:50:00,314 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-07-09 18:50:00,315 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.0 percent of original size [2021-07-09 18:50:00,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:50:00,318 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:345, output treesize:82 [2021-07-09 18:50:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:50:00,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060659842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:50:00,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:50:00,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-09 18:50:00,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819511342] [2021-07-09 18:50:00,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:50:00,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:50:00,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:50:00,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:50:00,438 INFO L87 Difference]: Start difference. First operand 2463 states and 8619 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:50:01,087 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2021-07-09 18:50:07,874 WARN L205 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 91 DAG size of output: 51 [2021-07-09 18:50:19,187 WARN L205 SmtUtils]: Spent 11.26 s on a formula simplification. DAG size of input: 85 DAG size of output: 52 [2021-07-09 18:50:21,337 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 102 DAG size of output: 36 [2021-07-09 18:50:21,576 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2021-07-09 18:50:21,848 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-07-09 18:50:26,290 WARN L205 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2021-07-09 18:50:26,519 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 18:50:28,773 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2021-07-09 18:50:35,022 WARN L205 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2021-07-09 18:50:58,157 WARN L205 SmtUtils]: Spent 23.10 s on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-07-09 18:50:58,782 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-09 18:51:01,269 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 71 [2021-07-09 18:51:09,543 WARN L205 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 86 DAG size of output: 76 [2021-07-09 18:51:15,970 WARN L205 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-07-09 18:51:16,186 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-09 18:51:16,388 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2021-07-09 18:51:16,767 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-09 18:51:17,212 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2021-07-09 18:51:17,550 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 108 [2021-07-09 18:51:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:18,037 INFO L93 Difference]: Finished difference Result 4854 states and 16220 transitions. [2021-07-09 18:51:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:51:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:51:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:18,047 INFO L225 Difference]: With dead ends: 4854 [2021-07-09 18:51:18,047 INFO L226 Difference]: Without dead ends: 4824 [2021-07-09 18:51:18,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 81898.2ms TimeCoverageRelationStatistics Valid=761, Invalid=4069, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:51:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4824 states. [2021-07-09 18:51:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4824 to 2470. [2021-07-09 18:51:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 2469 states have (on average 3.5006075334143376) internal successors, (8643), 2469 states have internal predecessors, (8643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 8643 transitions. [2021-07-09 18:51:18,093 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 8643 transitions. Word has length 29 [2021-07-09 18:51:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:18,093 INFO L482 AbstractCegarLoop]: Abstraction has 2470 states and 8643 transitions. [2021-07-09 18:51:18,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 8643 transitions. [2021-07-09 18:51:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:51:18,096 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:18,096 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:51:18,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-07-09 18:51:18,312 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1094655562, now seen corresponding path program 23 times [2021-07-09 18:51:18,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:18,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625593838] [2021-07-09 18:51:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:18,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:18,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625593838] [2021-07-09 18:51:18,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625593838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:18,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679996848] [2021-07-09 18:51:18,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:18,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:51:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 18:51:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:21,169 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 30 [2021-07-09 18:51:23,426 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 68 [2021-07-09 18:51:23,793 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-07-09 18:51:24,055 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2021-07-09 18:51:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:24,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679996848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:24,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:51:24,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-07-09 18:51:24,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510611933] [2021-07-09 18:51:24,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:51:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:51:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:51:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:51:24,229 INFO L87 Difference]: Start difference. First operand 2470 states and 8643 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:26,489 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-07-09 18:51:26,955 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-09 18:51:28,582 WARN L205 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 67 DAG size of output: 35 [2021-07-09 18:51:28,742 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-07-09 18:51:29,090 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-07-09 18:51:29,440 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-07-09 18:51:31,653 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 103 DAG size of output: 49 [2021-07-09 18:51:31,948 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-07-09 18:51:32,289 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2021-07-09 18:51:34,899 WARN L205 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2021-07-09 18:51:37,376 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2021-07-09 18:51:39,667 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2021-07-09 18:51:39,926 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2021-07-09 18:51:40,103 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2021-07-09 18:51:40,752 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2021-07-09 18:51:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:51:40,838 INFO L93 Difference]: Finished difference Result 4250 states and 14363 transitions. [2021-07-09 18:51:40,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:51:40,838 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:51:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:51:40,846 INFO L225 Difference]: With dead ends: 4250 [2021-07-09 18:51:40,847 INFO L226 Difference]: Without dead ends: 4235 [2021-07-09 18:51:40,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 20750.9ms TimeCoverageRelationStatistics Valid=552, Invalid=2640, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:51:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-07-09 18:51:40,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 2477. [2021-07-09 18:51:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2477 states, 2476 states have (on average 3.500403877221325) internal successors, (8667), 2476 states have internal predecessors, (8667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2477 states to 2477 states and 8667 transitions. [2021-07-09 18:51:40,893 INFO L78 Accepts]: Start accepts. Automaton has 2477 states and 8667 transitions. Word has length 29 [2021-07-09 18:51:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:51:40,893 INFO L482 AbstractCegarLoop]: Abstraction has 2477 states and 8667 transitions. [2021-07-09 18:51:40,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:51:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2477 states and 8667 transitions. [2021-07-09 18:51:40,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:51:40,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:51:40,898 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:51:41,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:41,114 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:51:41,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:51:41,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1069523126, now seen corresponding path program 24 times [2021-07-09 18:51:41,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:51:41,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371650832] [2021-07-09 18:51:41,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:51:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:51:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:51:41,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:51:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371650832] [2021-07-09 18:51:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371650832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:51:41,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578963214] [2021-07-09 18:51:41,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:51:41,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:51:41,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:51:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:51:41,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:51:48,079 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 34 [2021-07-09 18:52:28,661 WARN L205 SmtUtils]: Spent 40.49 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-07-09 18:52:28,711 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_111], 7=[v_prenex_107, v_prenex_108, v_prenex_109, v_prenex_110]} [2021-07-09 18:52:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:52:28,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:28,874 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-07-09 18:52:28,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:28,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-07-09 18:52:28,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:28,990 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-07-09 18:52:28,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:29,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:52:29,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:29,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:52:29,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:29,206 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-07-09 18:52:29,206 INFO L628 ElimStorePlain]: treesize reduction 19, result has 91.5 percent of original size [2021-07-09 18:52:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,236 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:52:29,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:52:29,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:29,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,278 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-07-09 18:52:29,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-07-09 18:52:29,280 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:29,401 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-07-09 18:52:29,401 INFO L628 ElimStorePlain]: treesize reduction 21, result has 87.3 percent of original size [2021-07-09 18:52:29,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,423 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:52:29,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-07-09 18:52:29,424 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:29,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:29,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:52:29,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:29,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-07-09 18:52:29,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:52:29,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:52:29,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-09 18:52:29,549 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:301, output treesize:71 [2021-07-09 18:52:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:52:29,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578963214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:52:29,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:52:29,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-09 18:52:29,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879861502] [2021-07-09 18:52:29,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:52:29,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:52:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:52:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:52:29,665 INFO L87 Difference]: Start difference. First operand 2477 states and 8667 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:52:30,261 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-07-09 18:52:30,534 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-07-09 18:52:30,826 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-07-09 18:52:31,183 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-07-09 18:52:31,324 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-07-09 18:52:31,518 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-07-09 18:52:31,916 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 54 [2021-07-09 18:52:40,053 WARN L205 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-07-09 18:52:40,569 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-07-09 18:52:46,956 WARN L205 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2021-07-09 18:52:47,114 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-07-09 18:52:47,379 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-07-09 18:52:47,620 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-07-09 18:53:34,237 WARN L205 SmtUtils]: Spent 46.44 s on a formula simplification. DAG size of input: 141 DAG size of output: 108 [2021-07-09 18:53:56,582 WARN L205 SmtUtils]: Spent 22.30 s on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2021-07-09 18:54:47,058 WARN L205 SmtUtils]: Spent 48.33 s on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2021-07-09 18:54:47,202 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-07-09 18:54:47,471 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-07-09 18:54:49,774 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-07-09 18:54:50,090 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-07-09 18:54:50,251 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 58 [2021-07-09 18:54:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:50,437 INFO L93 Difference]: Finished difference Result 4860 states and 16315 transitions. [2021-07-09 18:54:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-07-09 18:54:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:54:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:50,446 INFO L225 Difference]: With dead ends: 4860 [2021-07-09 18:54:50,446 INFO L226 Difference]: Without dead ends: 4830 [2021-07-09 18:54:50,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 182881.2ms TimeCoverageRelationStatistics Valid=803, Invalid=4167, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:54:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4830 states. [2021-07-09 18:54:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4830 to 2466. [2021-07-09 18:54:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 2465 states have (on average 3.502231237322515) internal successors, (8633), 2465 states have internal predecessors, (8633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 8633 transitions. [2021-07-09 18:54:50,492 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 8633 transitions. Word has length 29 [2021-07-09 18:54:50,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:50,492 INFO L482 AbstractCegarLoop]: Abstraction has 2466 states and 8633 transitions. [2021-07-09 18:54:50,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:50,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 8633 transitions. [2021-07-09 18:54:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:54:50,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:50,496 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:50,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:50,709 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:50,709 INFO L82 PathProgramCache]: Analyzing trace with hash -847199862, now seen corresponding path program 35 times [2021-07-09 18:54:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:50,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879487780] [2021-07-09 18:54:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:51,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:51,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879487780] [2021-07-09 18:54:51,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879487780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:51,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051494079] [2021-07-09 18:54:51,051 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:51,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:54:51,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:51,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:54:51,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,556 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-07-09 18:54:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 52 [2021-07-09 18:54:51,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,613 INFO L354 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2021-07-09 18:54:51,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 38 [2021-07-09 18:54:51,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 7 [2021-07-09 18:54:51,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,675 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-07-09 18:54:51,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 23 [2021-07-09 18:54:51,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:51,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 97 [2021-07-09 18:54:51,814 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,817 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:54:51,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:54:51,821 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,888 INFO L354 Elim1Store]: treesize reduction 36, result has 57.6 percent of original size [2021-07-09 18:54:51,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 33 treesize of output 61 [2021-07-09 18:54:51,899 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:51,920 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-07-09 18:54:51,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 19 [2021-07-09 18:54:51,922 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:52,001 INFO L628 ElimStorePlain]: treesize reduction 112, result has 36.7 percent of original size [2021-07-09 18:54:52,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:54:52,002 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:433, output treesize:52 [2021-07-09 18:54:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051494079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:52,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:52,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-07-09 18:54:52,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070439204] [2021-07-09 18:54:52,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:54:52,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:54:52,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:54:52,196 INFO L87 Difference]: Start difference. First operand 2466 states and 8633 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:53,958 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:54:54,097 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-07-09 18:54:54,221 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-07-09 18:54:54,532 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-07-09 18:54:54,817 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-07-09 18:54:54,972 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-07-09 18:54:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:55,766 INFO L93 Difference]: Finished difference Result 4518 states and 15011 transitions. [2021-07-09 18:54:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:54:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:54:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:55,774 INFO L225 Difference]: With dead ends: 4518 [2021-07-09 18:54:55,774 INFO L226 Difference]: Without dead ends: 4474 [2021-07-09 18:54:55,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 3398.6ms TimeCoverageRelationStatistics Valid=810, Invalid=3746, Unknown=0, NotChecked=0, Total=4556 [2021-07-09 18:54:55,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-07-09 18:54:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 2505. [2021-07-09 18:54:55,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2504 states have (on average 3.5027955271565494) internal successors, (8771), 2504 states have internal predecessors, (8771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:55,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 8771 transitions. [2021-07-09 18:54:55,821 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 8771 transitions. Word has length 29 [2021-07-09 18:54:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:55,821 INFO L482 AbstractCegarLoop]: Abstraction has 2505 states and 8771 transitions. [2021-07-09 18:54:55,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 8771 transitions. [2021-07-09 18:54:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:54:55,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:55,825 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:56,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:56,040 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash -12576832, now seen corresponding path program 36 times [2021-07-09 18:54:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:56,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242993035] [2021-07-09 18:54:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:56,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:56,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242993035] [2021-07-09 18:54:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242993035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:56,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137691368] [2021-07-09 18:54:56,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:56,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:54:56,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:54:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:54:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:54:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:56,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-07-09 18:54:56,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:54:56,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,725 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-07-09 18:54:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-07-09 18:54:56,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:54:56,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,778 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-07-09 18:54:56,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-07-09 18:54:56,787 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:54:56,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-07-09 18:54:56,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-07-09 18:54:56,851 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-09 18:54:56,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:54:56,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:54:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 10 [2021-07-09 18:54:56,859 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-09 18:54:56,896 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-07-09 18:54:56,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-09 18:54:56,897 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:355, output treesize:35 [2021-07-09 18:54:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:56,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137691368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:56,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:54:56,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-07-09 18:54:56,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179659286] [2021-07-09 18:54:56,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:54:56,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:54:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:54:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:54:56,955 INFO L87 Difference]: Start difference. First operand 2505 states and 8771 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:58,323 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2021-07-09 18:54:58,541 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-07-09 18:54:58,842 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-07-09 18:54:59,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:54:59,182 INFO L93 Difference]: Finished difference Result 4394 states and 14553 transitions. [2021-07-09 18:54:59,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:54:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:54:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:54:59,190 INFO L225 Difference]: With dead ends: 4394 [2021-07-09 18:54:59,190 INFO L226 Difference]: Without dead ends: 4364 [2021-07-09 18:54:59,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2149.4ms TimeCoverageRelationStatistics Valid=590, Invalid=2490, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:54:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4364 states. [2021-07-09 18:54:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4364 to 2537. [2021-07-09 18:54:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 3.5055205047318614) internal successors, (8890), 2536 states have internal predecessors, (8890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 8890 transitions. [2021-07-09 18:54:59,246 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 8890 transitions. Word has length 29 [2021-07-09 18:54:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:54:59,246 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 8890 transitions. [2021-07-09 18:54:59,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:54:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 8890 transitions. [2021-07-09 18:54:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:54:59,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:54:59,249 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:54:59,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:59,465 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:54:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:54:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash -207836590, now seen corresponding path program 37 times [2021-07-09 18:54:59,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:54:59,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572597912] [2021-07-09 18:54:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:54:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:54:59,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:54:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572597912] [2021-07-09 18:54:59,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572597912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:54:59,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886325910] [2021-07-09 18:54:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:54:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:54:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:54:59,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:00,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886325910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:00,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:00,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-07-09 18:55:00,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158176605] [2021-07-09 18:55:00,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:55:00,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:00,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:55:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:55:00,229 INFO L87 Difference]: Start difference. First operand 2537 states and 8890 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:55:01,480 INFO L93 Difference]: Finished difference Result 3675 states and 12063 transitions. [2021-07-09 18:55:01,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:55:01,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 18:55:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:55:01,487 INFO L225 Difference]: With dead ends: 3675 [2021-07-09 18:55:01,488 INFO L226 Difference]: Without dead ends: 3645 [2021-07-09 18:55:01,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1314.7ms TimeCoverageRelationStatistics Valid=450, Invalid=1806, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:55:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3645 states. [2021-07-09 18:55:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3645 to 2550. [2021-07-09 18:55:01,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2550 states, 2549 states have (on average 3.507257748136524) internal successors, (8940), 2549 states have internal predecessors, (8940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:01,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2550 states to 2550 states and 8940 transitions. [2021-07-09 18:55:01,530 INFO L78 Accepts]: Start accepts. Automaton has 2550 states and 8940 transitions. Word has length 29 [2021-07-09 18:55:01,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:55:01,530 INFO L482 AbstractCegarLoop]: Abstraction has 2550 states and 8940 transitions. [2021-07-09 18:55:01,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:01,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2550 states and 8940 transitions. [2021-07-09 18:55:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 18:55:01,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:55:01,533 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:55:01,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable964 [2021-07-09 18:55:01,749 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:55:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:55:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1152820346, now seen corresponding path program 25 times [2021-07-09 18:55:01,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:55:01,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642480037] [2021-07-09 18:55:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:55:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:02,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:55:02,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642480037] [2021-07-09 18:55:02,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642480037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:02,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187035052] [2021-07-09 18:55:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:55:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:55:02,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:55:06,444 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 42 [2021-07-09 18:55:32,796 WARN L205 SmtUtils]: Spent 26.22 s on a formula simplification. DAG size of input: 102 DAG size of output: 82 [2021-07-09 18:55:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:55:33,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187035052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:55:33,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:55:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-07-09 18:55:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287535043] [2021-07-09 18:55:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:55:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:55:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:55:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:55:33,081 INFO L87 Difference]: Start difference. First operand 2550 states and 8940 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:55:35,794 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-07-09 18:55:40,388 WARN L205 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 40 DAG size of output: 39 Received shutdown request... [2021-07-09 18:55:44,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:55:45,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:55:45,159 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-09 18:55:45,161 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:55:45,163 WARN L196 ceAbstractionStarter]: Timeout [2021-07-09 18:55:45,163 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:55:45 BasicIcfg [2021-07-09 18:55:45,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:55:45,163 INFO L168 Benchmark]: Toolchain (without parser) took 890704.26 ms. Allocated memory was 199.2 MB in the beginning and 777.0 MB in the end (delta: 577.8 MB). Free memory was 178.4 MB in the beginning and 335.3 MB in the end (delta: -156.9 MB). Peak memory consumption was 421.7 MB. Max. memory is 8.0 GB. [2021-07-09 18:55:45,163 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 179.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:55:45,163 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.64 ms. Allocated memory is still 199.2 MB. Free memory was 178.3 MB in the beginning and 176.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:55:45,163 INFO L168 Benchmark]: Boogie Preprocessor took 10.72 ms. Allocated memory is still 199.2 MB. Free memory was 176.9 MB in the beginning and 175.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:55:45,163 INFO L168 Benchmark]: RCFGBuilder took 247.79 ms. Allocated memory is still 199.2 MB. Free memory was 175.9 MB in the beginning and 162.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-07-09 18:55:45,163 INFO L168 Benchmark]: TraceAbstraction took 890424.52 ms. Allocated memory was 199.2 MB in the beginning and 777.0 MB in the end (delta: 577.8 MB). Free memory was 162.0 MB in the beginning and 335.3 MB in the end (delta: -173.3 MB). Peak memory consumption was 405.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:55:45,163 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 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 179.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.64 ms. Allocated memory is still 199.2 MB. Free memory was 178.3 MB in the beginning and 176.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.72 ms. Allocated memory is still 199.2 MB. Free memory was 176.9 MB in the beginning and 175.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 247.79 ms. Allocated memory is still 199.2 MB. Free memory was 175.9 MB in the beginning and 162.4 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 890424.52 ms. Allocated memory was 199.2 MB in the beginning and 777.0 MB in the end (delta: 577.8 MB). Free memory was 162.0 MB in the beginning and 335.3 MB in the end (delta: -173.3 MB). Peak memory consumption was 405.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (2550states) and FLOYD_HOARE automaton (currently 35 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (665 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 890364.7ms, OverallIterations: 100, TraceHistogramMax: 2, EmptinessCheckTime: 261.5ms, AutomataDifference: 650539.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4112 SDtfs, 22135 SDslu, 26057 SDs, 0 SdLazy, 42651 SolverSat, 3761 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 45513.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5113 GetRequests, 1997 SyntacticMatches, 75 SemanticMatches, 3041 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37010 ImplicationChecksByTransitivity, 790921.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2550occurred in iteration=99, InterpolantAutomatonStates: 2563, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2703.5ms AutomataMinimizationTime, 99 MinimizatonAttempts, 86784 StatesRemovedByMinimization, 99 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 351.2ms SsaConstructionTime, 990.8ms SatisfiabilityAnalysisTime, 213126.0ms InterpolantComputationTime, 5182 NumberOfCodeBlocks, 5182 NumberOfCodeBlocksAsserted, 299 NumberOfCheckSat, 4990 ConstructedInterpolants, 69 QuantifiedInterpolants, 56128 SizeOfPredicates, 391 NumberOfNonLiveVariables, 5368 ConjunctsInSsa, 993 ConjunctsInUnsatCore, 192 InterpolantComputations, 8 PerfectInterpolantSequences, 247/891 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown