/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:40:09,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:40:09,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:40:09,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:40:09,809 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:40:09,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:40:09,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:40:09,810 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-Separate.epf [2021-06-05 14:40:09,825 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:40:09,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:40:09,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:40:09,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:40:09,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:40:09,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:40:09,826 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:40:09,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:40:09,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:40:09,826 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:40:09,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:40:09,826 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:40:09,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:40:09,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:40:09,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:40:09,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:40:10,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:40:10,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:40:10,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:40:10,066 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:40:10,067 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:40:10,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl [2021-06-05 14:40:10,082 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-symm.wvr.bpl' [2021-06-05 14:40:10,129 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:40:10,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:40:10,132 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:40:10,132 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:40:10,132 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:40:10,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:40:10,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:40:10,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:40:10,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:40:10,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,183 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,183 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... [2021-06-05 14:40:10,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:40:10,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:40:10,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:40:10,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:40:10,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:40:10,262 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:40:10,262 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:40:10,262 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:40:10,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:40:10,263 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:40:10,263 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:40:10,263 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:40:10,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:40:10,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:40:10,264 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:40:10,733 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:40:10,734 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 14:40:10,736 INFO L202 PluginConnector]: Adding new model poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:40:10 BoogieIcfgContainer [2021-06-05 14:40:10,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:40:10,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:40:10,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:40:10,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:40:10,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:40:10" (1/2) ... [2021-06-05 14:40:10,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ce41f6d and model type poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:40:10, skipping insertion in model container [2021-06-05 14:40:10,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:40:10" (2/2) ... [2021-06-05 14:40:10,745 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-symm.wvr.bpl [2021-06-05 14:40:10,749 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:40:10,750 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:40:10,750 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:40:10,751 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:40:10,778 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:40:10,801 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:40:10,821 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:40:10,821 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:40:10,821 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:40:10,821 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:40:10,821 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:40:10,824 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:40:10,825 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:40:10,825 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:40:10,831 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 26 transitions, 68 flow [2021-06-05 14:40:10,840 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:40:10,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:10,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:10,847 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1990166855, now seen corresponding path program 1 times [2021-06-05 14:40:10,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:10,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412140210] [2021-06-05 14:40:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:11,530 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 121 [2021-06-05 14:40:11,954 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-05 14:40:12,282 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 48 [2021-06-05 14:40:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:12,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:12,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412140210] [2021-06-05 14:40:12,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412140210] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:12,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:12,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:40:12,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144124567] [2021-06-05 14:40:12,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:40:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:40:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:40:12,374 INFO L87 Difference]: Start difference. First operand has 41 states, 39 states have (on average 2.871794871794872) internal successors, (112), 40 states have internal predecessors, (112), 0 states have call successors, (0), 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 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:12,611 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-05 14:40:12,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:12,666 INFO L93 Difference]: Finished difference Result 66 states and 158 transitions. [2021-06-05 14:40:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:40:12,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:40:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:12,674 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:40:12,674 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:40:12,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 611.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:40:12,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:40:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2021-06-05 14:40:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.813953488372093) internal successors, (121), 43 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 121 transitions. [2021-06-05 14:40:12,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 121 transitions. Word has length 10 [2021-06-05 14:40:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:12,704 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 121 transitions. [2021-06-05 14:40:12,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:12,705 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 121 transitions. [2021-06-05 14:40:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:40:12,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:12,705 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:12,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:40:12,706 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1977673933, now seen corresponding path program 2 times [2021-06-05 14:40:12,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:12,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412806444] [2021-06-05 14:40:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,093 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2021-06-05 14:40:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412806444] [2021-06-05 14:40:13,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412806444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:40:13,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728806005] [2021-06-05 14:40:13,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:40:13,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:40:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:40:13,153 INFO L87 Difference]: Start difference. First operand 44 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,319 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-05 14:40:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,344 INFO L93 Difference]: Finished difference Result 66 states and 156 transitions. [2021-06-05 14:40:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:40:13,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:40:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,345 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:40:13,345 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:40:13,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:40:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:40:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-05 14:40:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 126 transitions. [2021-06-05 14:40:13,350 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 126 transitions. Word has length 10 [2021-06-05 14:40:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,350 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 126 transitions. [2021-06-05 14:40:13,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 126 transitions. [2021-06-05 14:40:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:40:13,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,351 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:40:13,351 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1880928136, now seen corresponding path program 1 times [2021-06-05 14:40:13,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865358573] [2021-06-05 14:40:13,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865358573] [2021-06-05 14:40:13,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865358573] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715594271] [2021-06-05 14:40:13,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,363 INFO L87 Difference]: Start difference. First operand 46 states and 126 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,372 INFO L93 Difference]: Finished difference Result 52 states and 141 transitions. [2021-06-05 14:40:13,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:40:13,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,375 INFO L225 Difference]: With dead ends: 52 [2021-06-05 14:40:13,375 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 14:40:13,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 14:40:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 14:40:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.764705882352941) internal successors, (141), 51 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 141 transitions. [2021-06-05 14:40:13,379 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 141 transitions. Word has length 11 [2021-06-05 14:40:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,379 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 141 transitions. [2021-06-05 14:40:13,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,379 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 141 transitions. [2021-06-05 14:40:13,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:40:13,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:40:13,380 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1648216420, now seen corresponding path program 1 times [2021-06-05 14:40:13,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065355609] [2021-06-05 14:40:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065355609] [2021-06-05 14:40:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065355609] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101004645] [2021-06-05 14:40:13,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,399 INFO L87 Difference]: Start difference. First operand 52 states and 141 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,410 INFO L93 Difference]: Finished difference Result 58 states and 156 transitions. [2021-06-05 14:40:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:40:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,414 INFO L225 Difference]: With dead ends: 58 [2021-06-05 14:40:13,414 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 14:40:13,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 14:40:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-06-05 14:40:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 57 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 156 transitions. [2021-06-05 14:40:13,424 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 156 transitions. Word has length 11 [2021-06-05 14:40:13,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,425 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 156 transitions. [2021-06-05 14:40:13,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 156 transitions. [2021-06-05 14:40:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:40:13,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,425 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:40:13,426 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1504532924, now seen corresponding path program 1 times [2021-06-05 14:40:13,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011363503] [2021-06-05 14:40:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011363503] [2021-06-05 14:40:13,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011363503] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014178302] [2021-06-05 14:40:13,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,448 INFO L87 Difference]: Start difference. First operand 58 states and 156 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,455 INFO L93 Difference]: Finished difference Result 66 states and 175 transitions. [2021-06-05 14:40:13,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:40:13,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,456 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:40:13,456 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 14:40:13,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 14:40:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-06-05 14:40:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.6923076923076925) internal successors, (175), 65 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 175 transitions. [2021-06-05 14:40:13,469 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 175 transitions. Word has length 11 [2021-06-05 14:40:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,469 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 175 transitions. [2021-06-05 14:40:13,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 175 transitions. [2021-06-05 14:40:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:40:13,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,470 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:40:13,470 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1535932638, now seen corresponding path program 1 times [2021-06-05 14:40:13,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070121170] [2021-06-05 14:40:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070121170] [2021-06-05 14:40:13,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070121170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739615206] [2021-06-05 14:40:13,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,482 INFO L87 Difference]: Start difference. First operand 66 states and 175 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,486 INFO L93 Difference]: Finished difference Result 74 states and 194 transitions. [2021-06-05 14:40:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:40:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,487 INFO L225 Difference]: With dead ends: 74 [2021-06-05 14:40:13,487 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 14:40:13,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 14:40:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-06-05 14:40:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.6575342465753424) internal successors, (194), 73 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 194 transitions. [2021-06-05 14:40:13,489 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 194 transitions. Word has length 11 [2021-06-05 14:40:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,490 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 194 transitions. [2021-06-05 14:40:13,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 194 transitions. [2021-06-05 14:40:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:40:13,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:40:13,491 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash -375396698, now seen corresponding path program 1 times [2021-06-05 14:40:13,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888028615] [2021-06-05 14:40:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:13,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888028615] [2021-06-05 14:40:13,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888028615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233338457] [2021-06-05 14:40:13,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,512 INFO L87 Difference]: Start difference. First operand 74 states and 194 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,528 INFO L93 Difference]: Finished difference Result 100 states and 228 transitions. [2021-06-05 14:40:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:40:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,529 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:40:13,530 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:40:13,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:40:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-05 14:40:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.4625) internal successors, (197), 80 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2021-06-05 14:40:13,544 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 12 [2021-06-05 14:40:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,544 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2021-06-05 14:40:13,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2021-06-05 14:40:13,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:40:13,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:40:13,546 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1248628485, now seen corresponding path program 1 times [2021-06-05 14:40:13,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448549432] [2021-06-05 14:40:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:13,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448549432] [2021-06-05 14:40:13,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448549432] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051006588] [2021-06-05 14:40:13,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,577 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,596 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-06-05 14:40:13,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:40:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,597 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:40:13,597 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:40:13,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:40:13,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2021-06-05 14:40:13,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2021-06-05 14:40:13,599 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 12 [2021-06-05 14:40:13,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,600 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2021-06-05 14:40:13,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,600 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2021-06-05 14:40:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:40:13,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,600 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:40:13,600 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash -579329596, now seen corresponding path program 1 times [2021-06-05 14:40:13,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374901090] [2021-06-05 14:40:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:13,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374901090] [2021-06-05 14:40:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374901090] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925257347] [2021-06-05 14:40:13,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,635 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,645 INFO L93 Difference]: Finished difference Result 82 states and 160 transitions. [2021-06-05 14:40:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:40:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,646 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:40:13,646 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:40:13,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:40:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-06-05 14:40:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1384615384615384) internal successors, (139), 65 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 139 transitions. [2021-06-05 14:40:13,648 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 139 transitions. Word has length 12 [2021-06-05 14:40:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,649 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 139 transitions. [2021-06-05 14:40:13,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 139 transitions. [2021-06-05 14:40:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:40:13,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:40:13,652 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 339573799, now seen corresponding path program 1 times [2021-06-05 14:40:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682248019] [2021-06-05 14:40:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:40:13,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682248019] [2021-06-05 14:40:13,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682248019] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:40:13,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:40:13,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:40:13,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077162186] [2021-06-05 14:40:13,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:40:13,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:13,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:40:13,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,694 INFO L87 Difference]: Start difference. First operand 66 states and 139 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:13,711 INFO L93 Difference]: Finished difference Result 82 states and 155 transitions. [2021-06-05 14:40:13,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:40:13,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:40:13,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:13,712 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:40:13,712 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:40:13,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:40:13,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:40:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-06-05 14:40:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-06-05 14:40:13,715 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 12 [2021-06-05 14:40:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:13,715 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-06-05 14:40:13,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-06-05 14:40:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:40:13,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:13,718 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:13,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:40:13,718 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1848204445, now seen corresponding path program 1 times [2021-06-05 14:40:13,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:13,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54155011] [2021-06-05 14:40:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:13,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:13,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54155011] [2021-06-05 14:40:13,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54155011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:13,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375790475] [2021-06-05 14:40:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:40:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:14,206 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-06-05 14:40:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:14,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375790475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:14,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:14,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:40:14,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193779416] [2021-06-05 14:40:14,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:14,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:14,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:14,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:14,477 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:14,604 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-06-05 14:40:14,802 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-05 14:40:14,976 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-05 14:40:15,162 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-05 14:40:15,349 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-06-05 14:40:15,559 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2021-06-05 14:40:15,713 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-06-05 14:40:15,895 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-06-05 14:40:16,073 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-05 14:40:16,210 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 14:40:16,407 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2021-06-05 14:40:16,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:16,438 INFO L93 Difference]: Finished difference Result 133 states and 272 transitions. [2021-06-05 14:40:16,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:40:16,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:40:16,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:16,439 INFO L225 Difference]: With dead ends: 133 [2021-06-05 14:40:16,440 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:40:16,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2202.9ms TimeCoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:40:16,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:40:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2021-06-05 14:40:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 14:40:16,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 14 [2021-06-05 14:40:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:16,442 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 14:40:16,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 14:40:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:40:16,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:16,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:16,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 14:40:16,658 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1124293829, now seen corresponding path program 2 times [2021-06-05 14:40:16,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:16,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91182404] [2021-06-05 14:40:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:16,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:16,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:16,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91182404] [2021-06-05 14:40:16,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91182404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610260351] [2021-06-05 14:40:16,927 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 [2021-06-05 14:40:16,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:16,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:40:16,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:17,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610260351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:17,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:17,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:40:17,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140624055] [2021-06-05 14:40:17,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:17,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:17,286 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:17,624 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-06-05 14:40:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:40:17,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:40:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:17,627 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:40:17,627 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:40:17,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 566.6ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:40:17,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:40:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-06-05 14:40:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-06-05 14:40:17,635 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-06-05 14:40:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:17,635 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-06-05 14:40:17,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-06-05 14:40:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:40:17,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:17,636 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:17,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:40:17,855 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:17,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1311401613, now seen corresponding path program 3 times [2021-06-05 14:40:17,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:17,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706642614] [2021-06-05 14:40:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706642614] [2021-06-05 14:40:18,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706642614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130674393] [2021-06-05 14:40:18,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:18,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:40:18,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:18,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:40:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:18,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130674393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:18,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:18,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:40:18,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212435041] [2021-06-05 14:40:18,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:18,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:18,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:18,301 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:18,653 INFO L93 Difference]: Finished difference Result 108 states and 218 transitions. [2021-06-05 14:40:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:40:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:40:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:18,654 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:40:18,654 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:40:18,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:40:18,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:40:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 14:40:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 14:40:18,656 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 14 [2021-06-05 14:40:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:18,656 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 14:40:18,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 14:40:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:40:18,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:18,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:18,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 14:40:18,877 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:18,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1308775837, now seen corresponding path program 4 times [2021-06-05 14:40:18,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:18,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566282219] [2021-06-05 14:40:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:19,041 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-05 14:40:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:19,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566282219] [2021-06-05 14:40:19,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566282219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852487700] [2021-06-05 14:40:19,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:19,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:40:19,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:40:19,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:19,308 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-05 14:40:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:19,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852487700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:19,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:19,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:40:19,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242288669] [2021-06-05 14:40:19,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:40:19,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:19,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:40:19,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:40:19,414 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,700 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-06-05 14:40:19,818 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-05 14:40:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:19,961 INFO L93 Difference]: Finished difference Result 120 states and 237 transitions. [2021-06-05 14:40:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:40:19,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:40:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:19,962 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:40:19,962 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:40:19,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 816.8ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:40:19,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:40:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2021-06-05 14:40:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2021-06-05 14:40:19,965 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 14 [2021-06-05 14:40:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:19,965 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2021-06-05 14:40:19,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2021-06-05 14:40:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:40:19,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:19,965 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:20,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,177 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1047840443, now seen corresponding path program 5 times [2021-06-05 14:40:20,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:20,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477819713] [2021-06-05 14:40:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:20,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:20,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477819713] [2021-06-05 14:40:20,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477819713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:20,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542214594] [2021-06-05 14:40:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:20,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:40:20,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:40:20,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:40:20,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:23,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 14:40:23,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,389 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,394 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,401 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,401 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,407 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,413 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,413 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,419 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,427 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:40:23,437 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,450 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,463 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,470 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:40:23,484 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,490 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,495 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,501 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,507 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,513 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,520 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,526 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,532 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,537 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,545 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,550 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,554 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,555 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,560 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,565 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,600 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,617 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,623 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2021-06-05 14:40:23,631 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,638 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,639 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,644 INFO L550 ElimStorePlain]: Start of recursive call 38: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,649 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,649 INFO L550 ElimStorePlain]: Start of recursive call 39: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,658 INFO L550 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,666 INFO L550 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,674 INFO L550 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,681 INFO L550 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,693 INFO L550 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,700 INFO L550 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:40:23,708 INFO L550 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,712 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,713 INFO L550 ElimStorePlain]: Start of recursive call 47: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,717 INFO L550 ElimStorePlain]: Start of recursive call 48: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,722 INFO L550 ElimStorePlain]: Start of recursive call 49: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,727 INFO L550 ElimStorePlain]: Start of recursive call 50: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,735 INFO L550 ElimStorePlain]: Start of recursive call 51: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,741 INFO L550 ElimStorePlain]: Start of recursive call 52: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,746 INFO L550 ElimStorePlain]: Start of recursive call 53: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2021-06-05 14:40:23,753 INFO L550 ElimStorePlain]: Start of recursive call 54: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,757 INFO L550 ElimStorePlain]: Start of recursive call 55: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,763 INFO L550 ElimStorePlain]: Start of recursive call 56: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,769 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,770 INFO L550 ElimStorePlain]: Start of recursive call 57: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,775 INFO L550 ElimStorePlain]: Start of recursive call 58: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,779 INFO L550 ElimStorePlain]: Start of recursive call 59: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,783 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,783 INFO L550 ElimStorePlain]: Start of recursive call 60: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,788 INFO L550 ElimStorePlain]: Start of recursive call 61: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,792 INFO L550 ElimStorePlain]: Start of recursive call 62: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,796 INFO L550 ElimStorePlain]: Start of recursive call 63: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,804 INFO L550 ElimStorePlain]: Start of recursive call 64: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,809 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,810 INFO L550 ElimStorePlain]: Start of recursive call 65: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:40:23,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2021-06-05 14:40:23,816 INFO L550 ElimStorePlain]: Start of recursive call 66: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,821 INFO L550 ElimStorePlain]: Start of recursive call 67: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,826 INFO L550 ElimStorePlain]: Start of recursive call 68: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,830 INFO L550 ElimStorePlain]: Start of recursive call 69: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,834 INFO L550 ElimStorePlain]: Start of recursive call 70: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,838 INFO L550 ElimStorePlain]: Start of recursive call 71: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,842 INFO L550 ElimStorePlain]: Start of recursive call 72: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,846 INFO L550 ElimStorePlain]: Start of recursive call 73: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,850 INFO L550 ElimStorePlain]: Start of recursive call 74: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,854 INFO L550 ElimStorePlain]: Start of recursive call 75: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,858 INFO L550 ElimStorePlain]: Start of recursive call 76: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,861 INFO L550 ElimStorePlain]: Start of recursive call 77: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,865 INFO L550 ElimStorePlain]: Start of recursive call 78: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,869 INFO L550 ElimStorePlain]: Start of recursive call 79: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,872 INFO L550 ElimStorePlain]: Start of recursive call 80: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,876 INFO L550 ElimStorePlain]: Start of recursive call 81: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,973 INFO L628 ElimStorePlain]: treesize reduction 34, result has 77.5 percent of original size [2021-06-05 14:40:23,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 14:40:23,977 INFO L550 ElimStorePlain]: Start of recursive call 82: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:40:23,979 INFO L550 ElimStorePlain]: Start of recursive call 83: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:23,982 INFO L550 ElimStorePlain]: Start of recursive call 84: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:23,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 14:40:23,985 INFO L550 ElimStorePlain]: Start of recursive call 85: End of recursive call: and 1 xjuncts. [2021-06-05 14:40:24,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:40:24,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:40:24,010 INFO L247 ElimStorePlain]: Needed 85 recursive calls to eliminate 3 variables, input treesize:4202, output treesize:38 [2021-06-05 14:40:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542214594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:40:24,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:40:24,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541198076] [2021-06-05 14:40:24,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:40:24,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:40:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:40:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:40:24,058 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:40:24,218 INFO L93 Difference]: Finished difference Result 93 states and 184 transitions. [2021-06-05 14:40:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:40:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:40:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:40:24,220 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:40:24,220 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:40:24,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:40:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:40:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-06-05 14:40:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 14:40:24,225 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 14 [2021-06-05 14:40:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:40:24,225 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 14:40:24,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:40:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 14:40:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:40:24,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:40:24,226 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:40:24,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 14:40:24,442 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:40:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:40:24,442 INFO L82 PathProgramCache]: Analyzing trace with hash 685771365, now seen corresponding path program 1 times [2021-06-05 14:40:24,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:40:24,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30082167] [2021-06-05 14:40:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:40:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:40:24,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:40:24,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30082167] [2021-06-05 14:40:24,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30082167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:40:24,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331764440] [2021-06-05 14:40:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:40:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:40:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:40:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:40:24,966 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown