/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 13:49:43,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 13:49:43,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 13:49:43,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 13:49:43,993 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 13:49:44,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 13:49:44,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 13:49:44,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 13:49:44,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 13:49:44,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 13:49:44,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 13:49:44,038 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 13:49:44,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 13:49:44,038 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 13:49:44,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 13:49:44,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 13:49:44,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 13:49:44,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 13:49:44,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 13:49:44,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 13:49:44,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 13:49:44,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 13:49:44,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 13:49:44,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 13:49:44,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 13:49:44,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 13:49:44,041 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 13:49:44,041 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 13:49:44,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 13:49:44,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 13:49:44,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 13:49:44,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 13:49:44,565 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 13:49:44,566 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 13:49:44,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl [2021-05-03 13:49:44,568 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/clever.wvr.bpl' [2021-05-03 13:49:44,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 13:49:44,631 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 13:49:44,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 13:49:44,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 13:49:44,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 13:49:44,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 13:49:44,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 13:49:44,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 13:49:44,655 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 13:49:44,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... [2021-05-03 13:49:44,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 13:49:44,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 13:49:44,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 13:49:44,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 13:49:44,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 13:49:44,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 13:49:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 13:49:44,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 13:49:44,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 13:49:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 13:49:44,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 13:49:44,737 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 13:49:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 13:49:44,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 13:49:44,737 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 13:49:44,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 13:49:44,875 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 13:49:44,877 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 01:49:44 BoogieIcfgContainer [2021-05-03 13:49:44,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 13:49:44,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 13:49:44,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 13:49:44,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 13:49:44,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 01:49:44" (1/2) ... [2021-05-03 13:49:44,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53413f6c and model type clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 01:49:44, skipping insertion in model container [2021-05-03 13:49:44,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 01:49:44" (2/2) ... [2021-05-03 13:49:44,882 INFO L111 eAbstractionObserver]: Analyzing ICFG clever.wvr.bpl [2021-05-03 13:49:44,886 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 13:49:44,886 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 13:49:44,888 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 13:49:44,889 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 13:49:44,910 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 13:49:44,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 13:49:44,934 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 13:49:44,934 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 13:49:44,934 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 13:49:44,934 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 13:49:44,934 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 13:49:44,934 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 13:49:44,934 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 13:49:44,934 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 13:49:44,940 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 30 places, 26 transitions, 68 flow [2021-05-03 13:49:44,949 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:44,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 13:49:44,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:44,962 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:44,962 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1207424972, now seen corresponding path program 1 times [2021-05-03 13:49:44,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:44,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190253560] [2021-05-03 13:49:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190253560] [2021-05-03 13:49:45,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:45,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 13:49:45,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836036072] [2021-05-03 13:49:45,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 13:49:45,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:45,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 13:49:45,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 13:49:45,097 INFO L87 Difference]: Start difference. First operand has 61 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-05-03 13:49:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:45,123 INFO L93 Difference]: Finished difference Result 99 states and 202 transitions. [2021-05-03 13:49:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 13:49:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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 [2021-05-03 13:49:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:45,130 INFO L225 Difference]: With dead ends: 99 [2021-05-03 13:49:45,131 INFO L226 Difference]: Without dead ends: 92 [2021-05-03 13:49:45,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 13:49:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-03 13:49:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-05-03 13:49:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 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) [2021-05-03 13:49:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-05-03 13:49:45,157 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 12 [2021-05-03 13:49:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:45,157 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-05-03 13:49:45,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 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) [2021-05-03 13:49:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-05-03 13:49:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:45,158 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,158 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 13:49:45,159 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,159 INFO L82 PathProgramCache]: Analyzing trace with hash -680974379, now seen corresponding path program 1 times [2021-05-03 13:49:45,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304916249] [2021-05-03 13:49:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304916249] [2021-05-03 13:49:45,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:45,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 13:49:45,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414563755] [2021-05-03 13:49:45,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 13:49:45,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 13:49:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 13:49:45,191 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:45,234 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-05-03 13:49:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:45,238 INFO L225 Difference]: With dead ends: 138 [2021-05-03 13:49:45,238 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 13:49:45,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 13:49:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-05-03 13:49:45,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-05-03 13:49:45,248 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 15 [2021-05-03 13:49:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:45,248 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-05-03 13:49:45,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-05-03 13:49:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 13:49:45,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,249 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 13:49:45,249 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,250 INFO L82 PathProgramCache]: Analyzing trace with hash -606254835, now seen corresponding path program 2 times [2021-05-03 13:49:45,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256816966] [2021-05-03 13:49:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256816966] [2021-05-03 13:49:45,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353991731] [2021-05-03 13:49:45,308 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 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 [2021-05-03 13:49:45,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:45,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:45,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 13:49:45,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:45,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-03 13:49:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965589295] [2021-05-03 13:49:45,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:49:45,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:49:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:49:45,405 INFO L87 Difference]: Start difference. First operand 93 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:45,474 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-05-03 13:49:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 13:49:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 13:49:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:45,482 INFO L225 Difference]: With dead ends: 139 [2021-05-03 13:49:45,483 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 13:49:45,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:45,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 13:49:45,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-05-03 13:49:45,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-05-03 13:49:45,492 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 15 [2021-05-03 13:49:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:45,492 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-05-03 13:49:45,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-05-03 13:49:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:49:45,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:45,493 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:45,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 13:49:45,715 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:45,716 INFO L82 PathProgramCache]: Analyzing trace with hash 554535225, now seen corresponding path program 1 times [2021-05-03 13:49:45,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:45,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228403828] [2021-05-03 13:49:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:45,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228403828] [2021-05-03 13:49:45,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712856725] [2021-05-03 13:49:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:45,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 13:49:45,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:46,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 13:49:46,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562258438] [2021-05-03 13:49:46,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:49:46,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:49:46,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:46,057 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,229 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2021-05-03 13:49:46,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 13:49:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,230 INFO L225 Difference]: With dead ends: 174 [2021-05-03 13:49:46,231 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 13:49:46,231 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:49:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 13:49:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 116. [2021-05-03 13:49:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-05-03 13:49:46,252 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 19 [2021-05-03 13:49:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,252 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-05-03 13:49:46,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-05-03 13:49:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 13:49:46,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,253 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,454 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1442580746, now seen corresponding path program 1 times [2021-05-03 13:49:46,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322197311] [2021-05-03 13:49:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:46,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322197311] [2021-05-03 13:49:46,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 13:49:46,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 13:49:46,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10336582] [2021-05-03 13:49:46,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 13:49:46,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 13:49:46,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:46,488 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2021-05-03 13:49:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,508 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-05-03 13:49:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 13:49:46,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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 19 [2021-05-03 13:49:46,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,509 INFO L225 Difference]: With dead ends: 139 [2021-05-03 13:49:46,509 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 13:49:46,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 13:49:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 13:49:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 119. [2021-05-03 13:49:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1610169491525424) internal successors, (255), 118 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 255 transitions. [2021-05-03 13:49:46,519 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 255 transitions. Word has length 19 [2021-05-03 13:49:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,520 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 255 transitions. [2021-05-03 13:49:46,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 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) [2021-05-03 13:49:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 255 transitions. [2021-05-03 13:49:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:49:46,520 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,521 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 13:49:46,521 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1722529490, now seen corresponding path program 2 times [2021-05-03 13:49:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479177491] [2021-05-03 13:49:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479177491] [2021-05-03 13:49:46,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555427430] [2021-05-03 13:49:46,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:49:46,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:46,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:46,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:46,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 13:49:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495117879] [2021-05-03 13:49:46,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:49:46,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:46,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:49:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:46,642 INFO L87 Difference]: Start difference. First operand 119 states and 255 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:46,717 INFO L93 Difference]: Finished difference Result 323 states and 674 transitions. [2021-05-03 13:49:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:49:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:46,718 INFO L225 Difference]: With dead ends: 323 [2021-05-03 13:49:46,718 INFO L226 Difference]: Without dead ends: 323 [2021-05-03 13:49:46,719 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:49:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-05-03 13:49:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 214. [2021-05-03 13:49:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.2816901408450705) internal successors, (486), 213 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 486 transitions. [2021-05-03 13:49:46,730 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 486 transitions. Word has length 22 [2021-05-03 13:49:46,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:46,733 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 486 transitions. [2021-05-03 13:49:46,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:46,734 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 486 transitions. [2021-05-03 13:49:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:49:46,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:46,738 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:46,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:46,949 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1469628671, now seen corresponding path program 1 times [2021-05-03 13:49:46,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:46,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903172664] [2021-05-03 13:49:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903172664] [2021-05-03 13:49:47,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770245529] [2021-05-03 13:49:47,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 13:49:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:47,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:47,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:47,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-03 13:49:47,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436809345] [2021-05-03 13:49:47,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:49:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:49:47,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:47,243 INFO L87 Difference]: Start difference. First operand 214 states and 486 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:47,567 INFO L93 Difference]: Finished difference Result 526 states and 1173 transitions. [2021-05-03 13:49:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:49:47,568 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:49:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:47,570 INFO L225 Difference]: With dead ends: 526 [2021-05-03 13:49:47,570 INFO L226 Difference]: Without dead ends: 519 [2021-05-03 13:49:47,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:49:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-05-03 13:49:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 379. [2021-05-03 13:49:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.3412698412698414) internal successors, (885), 378 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 885 transitions. [2021-05-03 13:49:47,579 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 885 transitions. Word has length 22 [2021-05-03 13:49:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:47,579 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 885 transitions. [2021-05-03 13:49:47,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:47,579 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 885 transitions. [2021-05-03 13:49:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:49:47,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:47,580 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:47,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:47,793 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:47,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1564569345, now seen corresponding path program 2 times [2021-05-03 13:49:47,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:47,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877520097] [2021-05-03 13:49:47,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:47,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877520097] [2021-05-03 13:49:47,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143410634] [2021-05-03 13:49:47,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 13:49:47,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:47,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:48,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:48,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-03 13:49:48,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429167085] [2021-05-03 13:49:48,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:49:48,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:48,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:49:48,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:48,131 INFO L87 Difference]: Start difference. First operand 379 states and 885 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:48,403 INFO L93 Difference]: Finished difference Result 636 states and 1439 transitions. [2021-05-03 13:49:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:49:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:49:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:48,406 INFO L225 Difference]: With dead ends: 636 [2021-05-03 13:49:48,406 INFO L226 Difference]: Without dead ends: 629 [2021-05-03 13:49:48,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:49:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-05-03 13:49:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 503. [2021-05-03 13:49:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.364541832669323) internal successors, (1187), 502 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1187 transitions. [2021-05-03 13:49:48,416 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1187 transitions. Word has length 22 [2021-05-03 13:49:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:48,417 INFO L480 AbstractCegarLoop]: Abstraction has 503 states and 1187 transitions. [2021-05-03 13:49:48,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:48,417 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1187 transitions. [2021-05-03 13:49:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:49:48,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:48,418 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:48,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:48,632 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:48,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1884591873, now seen corresponding path program 3 times [2021-05-03 13:49:48,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:48,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031297598] [2021-05-03 13:49:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031297598] [2021-05-03 13:49:48,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663739015] [2021-05-03 13:49:48,718 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 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 [2021-05-03 13:49:48,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:49:48,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:48,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:49:48,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:48,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-03 13:49:48,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614818770] [2021-05-03 13:49:48,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:49:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:49:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:48,857 INFO L87 Difference]: Start difference. First operand 503 states and 1187 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:49,076 INFO L93 Difference]: Finished difference Result 772 states and 1773 transitions. [2021-05-03 13:49:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:49:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:49:49,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:49,079 INFO L225 Difference]: With dead ends: 772 [2021-05-03 13:49:49,080 INFO L226 Difference]: Without dead ends: 758 [2021-05-03 13:49:49,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:49:49,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-05-03 13:49:49,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 650. [2021-05-03 13:49:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 2.391371340523883) internal successors, (1552), 649 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 1552 transitions. [2021-05-03 13:49:49,093 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 1552 transitions. Word has length 22 [2021-05-03 13:49:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:49,093 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 1552 transitions. [2021-05-03 13:49:49,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 1552 transitions. [2021-05-03 13:49:49,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:49:49,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:49,094 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:49,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,309 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1462940773, now seen corresponding path program 4 times [2021-05-03 13:49:49,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:49,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271794243] [2021-05-03 13:49:49,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:49,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271794243] [2021-05-03 13:49:49,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368262346] [2021-05-03 13:49:49,431 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:49,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:49,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:49,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:49,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-03 13:49:49,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065825313] [2021-05-03 13:49:49,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:49:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:49,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:49:49,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:49,582 INFO L87 Difference]: Start difference. First operand 650 states and 1552 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:49,822 INFO L93 Difference]: Finished difference Result 760 states and 1794 transitions. [2021-05-03 13:49:49,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:49:49,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:49:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:49,825 INFO L225 Difference]: With dead ends: 760 [2021-05-03 13:49:49,825 INFO L226 Difference]: Without dead ends: 753 [2021-05-03 13:49:49,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:49:49,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-05-03 13:49:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 695. [2021-05-03 13:49:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.403458213256484) internal successors, (1668), 694 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1668 transitions. [2021-05-03 13:49:49,836 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1668 transitions. Word has length 22 [2021-05-03 13:49:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:49,837 INFO L480 AbstractCegarLoop]: Abstraction has 695 states and 1668 transitions. [2021-05-03 13:49:49,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1668 transitions. [2021-05-03 13:49:49,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 13:49:49,838 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:49,838 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:50,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 13:49:50,052 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash 402162683, now seen corresponding path program 5 times [2021-05-03 13:49:50,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:50,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740238659] [2021-05-03 13:49:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740238659] [2021-05-03 13:49:50,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100935450] [2021-05-03 13:49:50,147 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:50,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:49:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:49:50,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:50,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:50,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-05-03 13:49:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723926203] [2021-05-03 13:49:50,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 13:49:50,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 13:49:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:49:50,291 INFO L87 Difference]: Start difference. First operand 695 states and 1668 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:50,538 INFO L93 Difference]: Finished difference Result 812 states and 1925 transitions. [2021-05-03 13:49:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:49:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 13:49:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:50,541 INFO L225 Difference]: With dead ends: 812 [2021-05-03 13:49:50,541 INFO L226 Difference]: Without dead ends: 805 [2021-05-03 13:49:50,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:49:50,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-05-03 13:49:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 745. [2021-05-03 13:49:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 2.413978494623656) internal successors, (1796), 744 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1796 transitions. [2021-05-03 13:49:50,553 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1796 transitions. Word has length 22 [2021-05-03 13:49:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:50,553 INFO L480 AbstractCegarLoop]: Abstraction has 745 states and 1796 transitions. [2021-05-03 13:49:50,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:50,553 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1796 transitions. [2021-05-03 13:49:50,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:50,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:50,554 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:50,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 13:49:50,769 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:50,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1433916551, now seen corresponding path program 6 times [2021-05-03 13:49:50,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:50,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228943710] [2021-05-03 13:49:50,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:50,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228943710] [2021-05-03 13:49:50,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128023353] [2021-05-03 13:49:50,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:50,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:49:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:50,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:51,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:51,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:51,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071680922] [2021-05-03 13:49:51,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:51,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:51,086 INFO L87 Difference]: Start difference. First operand 745 states and 1796 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:51,646 INFO L93 Difference]: Finished difference Result 1425 states and 3333 transitions. [2021-05-03 13:49:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:49:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:51,651 INFO L225 Difference]: With dead ends: 1425 [2021-05-03 13:49:51,651 INFO L226 Difference]: Without dead ends: 1411 [2021-05-03 13:49:51,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:49:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-05-03 13:49:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1030. [2021-05-03 13:49:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.445092322643343) internal successors, (2516), 1029 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2516 transitions. [2021-05-03 13:49:51,670 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2516 transitions. Word has length 25 [2021-05-03 13:49:51,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:51,670 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 2516 transitions. [2021-05-03 13:49:51,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2516 transitions. [2021-05-03 13:49:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:51,672 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:51,672 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:51,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,889 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:51,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:51,889 INFO L82 PathProgramCache]: Analyzing trace with hash -589865018, now seen corresponding path program 7 times [2021-05-03 13:49:51,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:51,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412316138] [2021-05-03 13:49:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:51,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412316138] [2021-05-03 13:49:51,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145532623] [2021-05-03 13:49:51,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:49:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:49:51,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:51,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 13:49:51,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362865600] [2021-05-03 13:49:51,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:49:51,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:51,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:49:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:49:51,967 INFO L87 Difference]: Start difference. First operand 1030 states and 2516 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,007 INFO L93 Difference]: Finished difference Result 1306 states and 3010 transitions. [2021-05-03 13:49:52,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:49:52,007 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,011 INFO L225 Difference]: With dead ends: 1306 [2021-05-03 13:49:52,011 INFO L226 Difference]: Without dead ends: 1303 [2021-05-03 13:49:52,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-05-03 13:49:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1033. [2021-05-03 13:49:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.435077519379845) internal successors, (2513), 1032 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2513 transitions. [2021-05-03 13:49:52,028 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2513 transitions. Word has length 25 [2021-05-03 13:49:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,028 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2513 transitions. [2021-05-03 13:49:52,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2513 transitions. [2021-05-03 13:49:52,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:52,030 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,030 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:52,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,245 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1073972118, now seen corresponding path program 8 times [2021-05-03 13:49:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:52,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176280105] [2021-05-03 13:49:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:52,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176280105] [2021-05-03 13:49:52,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125573730] [2021-05-03 13:49:52,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:49:52,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:52,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:49:52,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:52,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 13:49:52,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718710802] [2021-05-03 13:49:52,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:49:52,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:49:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:49:52,335 INFO L87 Difference]: Start difference. First operand 1033 states and 2513 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,384 INFO L93 Difference]: Finished difference Result 1948 states and 4632 transitions. [2021-05-03 13:49:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:52,385 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,390 INFO L225 Difference]: With dead ends: 1948 [2021-05-03 13:49:52,390 INFO L226 Difference]: Without dead ends: 1948 [2021-05-03 13:49:52,390 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:49:52,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-05-03 13:49:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1621. [2021-05-03 13:49:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.504938271604938) internal successors, (4058), 1620 states have internal predecessors, (4058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4058 transitions. [2021-05-03 13:49:52,421 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4058 transitions. Word has length 25 [2021-05-03 13:49:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,421 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 4058 transitions. [2021-05-03 13:49:52,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4058 transitions. [2021-05-03 13:49:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:52,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,423 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:52,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 13:49:52,629 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:52,629 INFO L82 PathProgramCache]: Analyzing trace with hash -396917486, now seen corresponding path program 9 times [2021-05-03 13:49:52,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:52,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431486938] [2021-05-03 13:49:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431486938] [2021-05-03 13:49:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000807530] [2021-05-03 13:49:52,656 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:52,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 13:49:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:49:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:49:52,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:52,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 13:49:52,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045724414] [2021-05-03 13:49:52,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:49:52,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:49:52,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:49:52,729 INFO L87 Difference]: Start difference. First operand 1621 states and 4058 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:52,769 INFO L93 Difference]: Finished difference Result 1941 states and 4622 transitions. [2021-05-03 13:49:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:49:52,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:52,774 INFO L225 Difference]: With dead ends: 1941 [2021-05-03 13:49:52,774 INFO L226 Difference]: Without dead ends: 1938 [2021-05-03 13:49:52,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:49:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1938 states. [2021-05-03 13:49:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1938 to 1621. [2021-05-03 13:49:52,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.5) internal successors, (4050), 1620 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 4050 transitions. [2021-05-03 13:49:52,801 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 4050 transitions. Word has length 25 [2021-05-03 13:49:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:52,801 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 4050 transitions. [2021-05-03 13:49:52,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 4050 transitions. [2021-05-03 13:49:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:52,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:52,803 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:53,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 13:49:53,018 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -2034489942, now seen corresponding path program 10 times [2021-05-03 13:49:53,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:53,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244594131] [2021-05-03 13:49:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:53,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244594131] [2021-05-03 13:49:53,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446243220] [2021-05-03 13:49:53,036 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:53,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:49:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:53,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:53,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:53,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 13:49:53,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899522405] [2021-05-03 13:49:53,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:49:53,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:49:53,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:49:53,094 INFO L87 Difference]: Start difference. First operand 1621 states and 4050 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:53,160 INFO L93 Difference]: Finished difference Result 1932 states and 4596 transitions. [2021-05-03 13:49:53,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:49:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:53,165 INFO L225 Difference]: With dead ends: 1932 [2021-05-03 13:49:53,165 INFO L226 Difference]: Without dead ends: 1918 [2021-05-03 13:49:53,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:49:53,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-05-03 13:49:53,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1635. [2021-05-03 13:49:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1635 states, 1634 states have (on average 2.4871481028151776) internal successors, (4064), 1634 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1635 states to 1635 states and 4064 transitions. [2021-05-03 13:49:53,189 INFO L78 Accepts]: Start accepts. Automaton has 1635 states and 4064 transitions. Word has length 25 [2021-05-03 13:49:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:53,189 INFO L480 AbstractCegarLoop]: Abstraction has 1635 states and 4064 transitions. [2021-05-03 13:49:53,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1635 states and 4064 transitions. [2021-05-03 13:49:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:53,191 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:53,191 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:53,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 13:49:53,406 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:53,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:53,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1747780543, now seen corresponding path program 11 times [2021-05-03 13:49:53,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:53,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810660662] [2021-05-03 13:49:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:53,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810660662] [2021-05-03 13:49:53,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219420484] [2021-05-03 13:49:53,547 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:53,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:49:53,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:53,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:53,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:53,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:53,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656246824] [2021-05-03 13:49:53,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:53,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:53,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:53,700 INFO L87 Difference]: Start difference. First operand 1635 states and 4064 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:54,266 INFO L93 Difference]: Finished difference Result 2667 states and 6496 transitions. [2021-05-03 13:49:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:49:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:54,273 INFO L225 Difference]: With dead ends: 2667 [2021-05-03 13:49:54,273 INFO L226 Difference]: Without dead ends: 2634 [2021-05-03 13:49:54,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:49:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-05-03 13:49:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2167. [2021-05-03 13:49:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 2.5203139427516157) internal successors, (5459), 2166 states have internal predecessors, (5459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 5459 transitions. [2021-05-03 13:49:54,307 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 5459 transitions. Word has length 25 [2021-05-03 13:49:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:54,307 INFO L480 AbstractCegarLoop]: Abstraction has 2167 states and 5459 transitions. [2021-05-03 13:49:54,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 5459 transitions. [2021-05-03 13:49:54,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:54,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:54,310 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:54,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:54,527 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:54,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:54,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1345299591, now seen corresponding path program 12 times [2021-05-03 13:49:54,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:54,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208493101] [2021-05-03 13:49:54,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:54,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208493101] [2021-05-03 13:49:54,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723259023] [2021-05-03 13:49:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:54,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 13:49:54,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:54,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:54,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:54,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033668125] [2021-05-03 13:49:54,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:54,804 INFO L87 Difference]: Start difference. First operand 2167 states and 5459 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:55,394 INFO L93 Difference]: Finished difference Result 2799 states and 6877 transitions. [2021-05-03 13:49:55,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:49:55,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:55,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:55,402 INFO L225 Difference]: With dead ends: 2799 [2021-05-03 13:49:55,402 INFO L226 Difference]: Without dead ends: 2766 [2021-05-03 13:49:55,402 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:49:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-05-03 13:49:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2353. [2021-05-03 13:49:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2353 states, 2352 states have (on average 2.5357142857142856) internal successors, (5964), 2352 states have internal predecessors, (5964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2353 states to 2353 states and 5964 transitions. [2021-05-03 13:49:55,441 INFO L78 Accepts]: Start accepts. Automaton has 2353 states and 5964 transitions. Word has length 25 [2021-05-03 13:49:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:55,441 INFO L480 AbstractCegarLoop]: Abstraction has 2353 states and 5964 transitions. [2021-05-03 13:49:55,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 2353 states and 5964 transitions. [2021-05-03 13:49:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:55,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:55,445 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:55,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 13:49:55,657 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2025191615, now seen corresponding path program 13 times [2021-05-03 13:49:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:55,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571003262] [2021-05-03 13:49:55,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:55,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571003262] [2021-05-03 13:49:55,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488694002] [2021-05-03 13:49:55,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:55,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:55,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:55,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:55,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586033058] [2021-05-03 13:49:55,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:55,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:55,937 INFO L87 Difference]: Start difference. First operand 2353 states and 5964 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:56,544 INFO L93 Difference]: Finished difference Result 3085 states and 7606 transitions. [2021-05-03 13:49:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:49:56,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:56,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:56,550 INFO L225 Difference]: With dead ends: 3085 [2021-05-03 13:49:56,550 INFO L226 Difference]: Without dead ends: 3052 [2021-05-03 13:49:56,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:49:56,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3052 states. [2021-05-03 13:49:56,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3052 to 2653. [2021-05-03 13:49:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.5448717948717947) internal successors, (6749), 2652 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 6749 transitions. [2021-05-03 13:49:56,593 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 6749 transitions. Word has length 25 [2021-05-03 13:49:56,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:56,593 INFO L480 AbstractCegarLoop]: Abstraction has 2653 states and 6749 transitions. [2021-05-03 13:49:56,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:56,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 6749 transitions. [2021-05-03 13:49:56,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:56,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:56,596 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:56,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,805 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:56,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:56,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1949753153, now seen corresponding path program 14 times [2021-05-03 13:49:56,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:56,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547481627] [2021-05-03 13:49:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547481627] [2021-05-03 13:49:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017381100] [2021-05-03 13:49:56,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:56,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:49:56,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:56,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:49:57,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:57,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:57,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219203509] [2021-05-03 13:49:57,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:57,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:57,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:57,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:57,064 INFO L87 Difference]: Start difference. First operand 2653 states and 6749 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:57,633 INFO L93 Difference]: Finished difference Result 3403 states and 8493 transitions. [2021-05-03 13:49:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:49:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:57,639 INFO L225 Difference]: With dead ends: 3403 [2021-05-03 13:49:57,639 INFO L226 Difference]: Without dead ends: 3367 [2021-05-03 13:49:57,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:49:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-05-03 13:49:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2970. [2021-05-03 13:49:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 2.560794880431122) internal successors, (7603), 2969 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 7603 transitions. [2021-05-03 13:49:57,692 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 7603 transitions. Word has length 25 [2021-05-03 13:49:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:57,692 INFO L480 AbstractCegarLoop]: Abstraction has 2970 states and 7603 transitions. [2021-05-03 13:49:57,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 7603 transitions. [2021-05-03 13:49:57,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:57,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:57,699 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:57,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:57,913 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1002318503, now seen corresponding path program 15 times [2021-05-03 13:49:57,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:57,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314342400] [2021-05-03 13:49:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314342400] [2021-05-03 13:49:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209255926] [2021-05-03 13:49:58,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:58,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:49:58,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:58,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:58,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:58,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060920909] [2021-05-03 13:49:58,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:58,192 INFO L87 Difference]: Start difference. First operand 2970 states and 7603 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:58,644 INFO L93 Difference]: Finished difference Result 3443 states and 8662 transitions. [2021-05-03 13:49:58,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:49:58,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:58,650 INFO L225 Difference]: With dead ends: 3443 [2021-05-03 13:49:58,650 INFO L226 Difference]: Without dead ends: 3410 [2021-05-03 13:49:58,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:49:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-05-03 13:49:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 3167. [2021-05-03 13:49:58,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3167 states, 3166 states have (on average 2.5634870499052433) internal successors, (8116), 3166 states have internal predecessors, (8116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3167 states to 3167 states and 8116 transitions. [2021-05-03 13:49:58,732 INFO L78 Accepts]: Start accepts. Automaton has 3167 states and 8116 transitions. Word has length 25 [2021-05-03 13:49:58,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:58,733 INFO L480 AbstractCegarLoop]: Abstraction has 3167 states and 8116 transitions. [2021-05-03 13:49:58,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:58,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3167 states and 8116 transitions. [2021-05-03 13:49:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:58,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:58,740 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:58,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 13:49:58,953 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:58,953 INFO L82 PathProgramCache]: Analyzing trace with hash -58459587, now seen corresponding path program 16 times [2021-05-03 13:49:58,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:58,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212774608] [2021-05-03 13:49:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:49:59,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:49:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212774608] [2021-05-03 13:49:59,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264920009] [2021-05-03 13:49:59,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:49:59,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:49:59,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:49:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:49:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:49:59,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:49:59,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:49:59,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720441103] [2021-05-03 13:49:59,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:49:59,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:49:59,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:49:59,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:49:59,221 INFO L87 Difference]: Start difference. First operand 3167 states and 8116 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:49:59,637 INFO L93 Difference]: Finished difference Result 3520 states and 8898 transitions. [2021-05-03 13:49:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 13:49:59,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:49:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:49:59,642 INFO L225 Difference]: With dead ends: 3520 [2021-05-03 13:49:59,642 INFO L226 Difference]: Without dead ends: 3507 [2021-05-03 13:49:59,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:49:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2021-05-03 13:49:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3303. [2021-05-03 13:49:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.562992125984252) internal successors, (8463), 3302 states have internal predecessors, (8463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8463 transitions. [2021-05-03 13:49:59,680 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8463 transitions. Word has length 25 [2021-05-03 13:49:59,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:49:59,680 INFO L480 AbstractCegarLoop]: Abstraction has 3303 states and 8463 transitions. [2021-05-03 13:49:59,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:49:59,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8463 transitions. [2021-05-03 13:49:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 13:49:59,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:49:59,684 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:49:59,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:49:59,898 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:49:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:49:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1190377043, now seen corresponding path program 17 times [2021-05-03 13:49:59,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:49:59,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592799545] [2021-05-03 13:49:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:49:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:00,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592799545] [2021-05-03 13:50:00,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550422125] [2021-05-03 13:50:00,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:00,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 13:50:00,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:00,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:00,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:00,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:00,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:00,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724453275] [2021-05-03 13:50:00,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:00,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:00,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:00,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:00,202 INFO L87 Difference]: Start difference. First operand 3303 states and 8463 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:00,682 INFO L93 Difference]: Finished difference Result 3850 states and 9692 transitions. [2021-05-03 13:50:00,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:50:00,682 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 13:50:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:00,688 INFO L225 Difference]: With dead ends: 3850 [2021-05-03 13:50:00,688 INFO L226 Difference]: Without dead ends: 3817 [2021-05-03 13:50:00,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:50:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-05-03 13:50:00,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 3492. [2021-05-03 13:50:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.5665998281294757) internal successors, (8960), 3491 states have internal predecessors, (8960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 8960 transitions. [2021-05-03 13:50:00,729 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 8960 transitions. Word has length 25 [2021-05-03 13:50:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:00,730 INFO L480 AbstractCegarLoop]: Abstraction has 3492 states and 8960 transitions. [2021-05-03 13:50:00,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 8960 transitions. [2021-05-03 13:50:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 13:50:00,734 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:00,734 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:00,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 13:50:00,947 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:00,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:00,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1196506414, now seen corresponding path program 3 times [2021-05-03 13:50:00,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:00,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254321612] [2021-05-03 13:50:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:01,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254321612] [2021-05-03 13:50:01,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198938782] [2021-05-03 13:50:01,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:01,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:01,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 13:50:01,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:01,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:01,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 13:50:01,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914339689] [2021-05-03 13:50:01,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 13:50:01,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:01,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 13:50:01,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:01,159 INFO L87 Difference]: Start difference. First operand 3492 states and 8960 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:01,335 INFO L93 Difference]: Finished difference Result 3385 states and 8558 transitions. [2021-05-03 13:50:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 13:50:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:01,375 INFO L225 Difference]: With dead ends: 3385 [2021-05-03 13:50:01,375 INFO L226 Difference]: Without dead ends: 3093 [2021-05-03 13:50:01,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 196.4ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:01,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-05-03 13:50:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 3088. [2021-05-03 13:50:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.557823129251701) internal successors, (7896), 3087 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 7896 transitions. [2021-05-03 13:50:01,408 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 7896 transitions. Word has length 26 [2021-05-03 13:50:01,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:01,408 INFO L480 AbstractCegarLoop]: Abstraction has 3088 states and 7896 transitions. [2021-05-03 13:50:01,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:01,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 7896 transitions. [2021-05-03 13:50:01,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 13:50:01,411 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:01,411 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:01,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 13:50:01,625 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1322834441, now seen corresponding path program 18 times [2021-05-03 13:50:01,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:01,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558295895] [2021-05-03 13:50:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:01,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558295895] [2021-05-03 13:50:01,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940701926] [2021-05-03 13:50:01,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:01,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:01,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:50:01,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:01,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:01,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 13:50:01,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506664305] [2021-05-03 13:50:01,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:50:01,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:50:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:50:01,978 INFO L87 Difference]: Start difference. First operand 3088 states and 7896 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:02,782 INFO L93 Difference]: Finished difference Result 3805 states and 9503 transitions. [2021-05-03 13:50:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:50:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 13:50:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:02,786 INFO L225 Difference]: With dead ends: 3805 [2021-05-03 13:50:02,786 INFO L226 Difference]: Without dead ends: 3772 [2021-05-03 13:50:02,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 514.5ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:50:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2021-05-03 13:50:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 3327. [2021-05-03 13:50:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.5673481659651234) internal successors, (8539), 3326 states have internal predecessors, (8539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8539 transitions. [2021-05-03 13:50:02,846 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8539 transitions. Word has length 28 [2021-05-03 13:50:02,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:02,846 INFO L480 AbstractCegarLoop]: Abstraction has 3327 states and 8539 transitions. [2021-05-03 13:50:02,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:02,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8539 transitions. [2021-05-03 13:50:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 13:50:02,849 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:02,850 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:03,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,064 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash -35994437, now seen corresponding path program 19 times [2021-05-03 13:50:03,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:03,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976814862] [2021-05-03 13:50:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976814862] [2021-05-03 13:50:03,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619474387] [2021-05-03 13:50:03,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:03,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:50:03,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:03,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:03,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 13:50:03,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988967309] [2021-05-03 13:50:03,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:50:03,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:03,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:50:03,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:50:03,425 INFO L87 Difference]: Start difference. First operand 3327 states and 8539 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:04,169 INFO L93 Difference]: Finished difference Result 3901 states and 9836 transitions. [2021-05-03 13:50:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:50:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 13:50:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:04,173 INFO L225 Difference]: With dead ends: 3901 [2021-05-03 13:50:04,173 INFO L226 Difference]: Without dead ends: 3868 [2021-05-03 13:50:04,174 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 538.0ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:50:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2021-05-03 13:50:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3566. [2021-05-03 13:50:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3565 states have (on average 2.571669004207574) internal successors, (9168), 3565 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 9168 transitions. [2021-05-03 13:50:04,228 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 9168 transitions. Word has length 28 [2021-05-03 13:50:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:04,228 INFO L480 AbstractCegarLoop]: Abstraction has 3566 states and 9168 transitions. [2021-05-03 13:50:04,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:04,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 9168 transitions. [2021-05-03 13:50:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 13:50:04,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:04,232 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:04,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 13:50:04,445 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:04,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1212842193, now seen corresponding path program 20 times [2021-05-03 13:50:04,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:04,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539830228] [2021-05-03 13:50:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:04,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539830228] [2021-05-03 13:50:04,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607809786] [2021-05-03 13:50:04,624 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:04,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:04,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:04,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:50:04,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:04,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:04,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:50:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451650823] [2021-05-03 13:50:04,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:04,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:04,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:04,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:04,823 INFO L87 Difference]: Start difference. First operand 3566 states and 9168 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:05,677 INFO L93 Difference]: Finished difference Result 4372 states and 10996 transitions. [2021-05-03 13:50:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:50:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 13:50:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:05,681 INFO L225 Difference]: With dead ends: 4372 [2021-05-03 13:50:05,681 INFO L226 Difference]: Without dead ends: 4339 [2021-05-03 13:50:05,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:50:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-05-03 13:50:05,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3961. [2021-05-03 13:50:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 2.5717171717171716) internal successors, (10184), 3960 states have internal predecessors, (10184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 10184 transitions. [2021-05-03 13:50:05,727 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 10184 transitions. Word has length 28 [2021-05-03 13:50:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:05,727 INFO L480 AbstractCegarLoop]: Abstraction has 3961 states and 10184 transitions. [2021-05-03 13:50:05,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 10184 transitions. [2021-05-03 13:50:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:05,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:05,731 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:05,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,945 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -257747651, now seen corresponding path program 4 times [2021-05-03 13:50:05,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:05,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618862447] [2021-05-03 13:50:05,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:05,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618862447] [2021-05-03 13:50:05,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457248905] [2021-05-03 13:50:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:05,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:05,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:06,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:06,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 13:50:06,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191916710] [2021-05-03 13:50:06,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:50:06,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:06,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:50:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:50:06,043 INFO L87 Difference]: Start difference. First operand 3961 states and 10184 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:06,149 INFO L93 Difference]: Finished difference Result 4649 states and 11665 transitions. [2021-05-03 13:50:06,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:06,150 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:06,156 INFO L225 Difference]: With dead ends: 4649 [2021-05-03 13:50:06,156 INFO L226 Difference]: Without dead ends: 4649 [2021-05-03 13:50:06,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-05-03 13:50:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4178. [2021-05-03 13:50:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.573617428776634) internal successors, (10750), 4177 states have internal predecessors, (10750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 10750 transitions. [2021-05-03 13:50:06,231 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 10750 transitions. Word has length 29 [2021-05-03 13:50:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:06,232 INFO L480 AbstractCegarLoop]: Abstraction has 4178 states and 10750 transitions. [2021-05-03 13:50:06,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 10750 transitions. [2021-05-03 13:50:06,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:06,237 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:06,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:06,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 13:50:06,452 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:06,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:06,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2058011506, now seen corresponding path program 21 times [2021-05-03 13:50:06,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:06,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176098702] [2021-05-03 13:50:06,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:06,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176098702] [2021-05-03 13:50:06,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375887232] [2021-05-03 13:50:06,482 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:06,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 13:50:06,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:06,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:06,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-03 13:50:06,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023215891] [2021-05-03 13:50:06,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 13:50:06,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:06,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 13:50:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:06,565 INFO L87 Difference]: Start difference. First operand 4178 states and 10750 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:06,661 INFO L93 Difference]: Finished difference Result 3822 states and 9413 transitions. [2021-05-03 13:50:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:06,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:06,666 INFO L225 Difference]: With dead ends: 3822 [2021-05-03 13:50:06,666 INFO L226 Difference]: Without dead ends: 3822 [2021-05-03 13:50:06,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:50:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-05-03 13:50:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3081. [2021-05-03 13:50:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3081 states, 3080 states have (on average 2.523701298701299) internal successors, (7773), 3080 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3081 states to 3081 states and 7773 transitions. [2021-05-03 13:50:06,707 INFO L78 Accepts]: Start accepts. Automaton has 3081 states and 7773 transitions. Word has length 29 [2021-05-03 13:50:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:06,707 INFO L480 AbstractCegarLoop]: Abstraction has 3081 states and 7773 transitions. [2021-05-03 13:50:06,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3081 states and 7773 transitions. [2021-05-03 13:50:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:06,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:06,710 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:06,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 13:50:06,925 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:06,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1837908011, now seen corresponding path program 22 times [2021-05-03 13:50:06,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:06,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967900712] [2021-05-03 13:50:06,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:06,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:06,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967900712] [2021-05-03 13:50:06,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870055890] [2021-05-03 13:50:06,966 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:06,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:06,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:06,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:50:06,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:07,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:07,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 13:50:07,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101627224] [2021-05-03 13:50:07,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:07,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:07,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:07,024 INFO L87 Difference]: Start difference. First operand 3081 states and 7773 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:07,094 INFO L93 Difference]: Finished difference Result 3755 states and 9365 transitions. [2021-05-03 13:50:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:07,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:07,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:07,099 INFO L225 Difference]: With dead ends: 3755 [2021-05-03 13:50:07,099 INFO L226 Difference]: Without dead ends: 3743 [2021-05-03 13:50:07,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3743 states. [2021-05-03 13:50:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3743 to 3644. [2021-05-03 13:50:07,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 2.4888827889102387) internal successors, (9067), 3643 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 9067 transitions. [2021-05-03 13:50:07,148 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 9067 transitions. Word has length 29 [2021-05-03 13:50:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:07,148 INFO L480 AbstractCegarLoop]: Abstraction has 3644 states and 9067 transitions. [2021-05-03 13:50:07,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 9067 transitions. [2021-05-03 13:50:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:07,150 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:07,150 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:07,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,351 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:07,351 INFO L82 PathProgramCache]: Analyzing trace with hash 432491545, now seen corresponding path program 23 times [2021-05-03 13:50:07,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:07,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380326306] [2021-05-03 13:50:07,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380326306] [2021-05-03 13:50:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595931758] [2021-05-03 13:50:07,416 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:07,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:07,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:07,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:50:07,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:07,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:07,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 13:50:07,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796500747] [2021-05-03 13:50:07,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:50:07,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:07,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:50:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:50:07,515 INFO L87 Difference]: Start difference. First operand 3644 states and 9067 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:07,564 INFO L93 Difference]: Finished difference Result 3731 states and 9053 transitions. [2021-05-03 13:50:07,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:07,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:07,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:07,568 INFO L225 Difference]: With dead ends: 3731 [2021-05-03 13:50:07,568 INFO L226 Difference]: Without dead ends: 3731 [2021-05-03 13:50:07,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:50:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2021-05-03 13:50:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3636. [2021-05-03 13:50:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.4434662998624486) internal successors, (8882), 3635 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 8882 transitions. [2021-05-03 13:50:07,618 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 8882 transitions. Word has length 29 [2021-05-03 13:50:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:07,619 INFO L480 AbstractCegarLoop]: Abstraction has 3636 states and 8882 transitions. [2021-05-03 13:50:07,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 8882 transitions. [2021-05-03 13:50:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:07,622 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:07,622 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:07,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,837 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:07,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:07,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1962584287, now seen corresponding path program 24 times [2021-05-03 13:50:07,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:07,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118265786] [2021-05-03 13:50:07,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:07,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118265786] [2021-05-03 13:50:07,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247124795] [2021-05-03 13:50:07,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:07,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:07,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:50:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:07,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:07,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 13:50:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777072177] [2021-05-03 13:50:07,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:50:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:50:07,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:50:07,968 INFO L87 Difference]: Start difference. First operand 3636 states and 8882 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,023 INFO L93 Difference]: Finished difference Result 3810 states and 9235 transitions. [2021-05-03 13:50:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 13:50:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,028 INFO L225 Difference]: With dead ends: 3810 [2021-05-03 13:50:08,028 INFO L226 Difference]: Without dead ends: 3808 [2021-05-03 13:50:08,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3808 states. [2021-05-03 13:50:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3808 to 3714. [2021-05-03 13:50:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.4368435227578775) internal successors, (9048), 3713 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9048 transitions. [2021-05-03 13:50:08,071 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9048 transitions. Word has length 29 [2021-05-03 13:50:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,071 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 9048 transitions. [2021-05-03 13:50:08,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9048 transitions. [2021-05-03 13:50:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:08,074 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,074 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:08,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-03 13:50:08,288 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:08,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:08,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1927015269, now seen corresponding path program 25 times [2021-05-03 13:50:08,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:08,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443596186] [2021-05-03 13:50:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:08,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443596186] [2021-05-03 13:50:08,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331827160] [2021-05-03 13:50:08,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:50:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:08,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:08,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-03 13:50:08,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211037477] [2021-05-03 13:50:08,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 13:50:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 13:50:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 13:50:08,380 INFO L87 Difference]: Start difference. First operand 3714 states and 9048 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,431 INFO L93 Difference]: Finished difference Result 3976 states and 9563 transitions. [2021-05-03 13:50:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:08,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:08,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,435 INFO L225 Difference]: With dead ends: 3976 [2021-05-03 13:50:08,435 INFO L226 Difference]: Without dead ends: 3973 [2021-05-03 13:50:08,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:50:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3973 states. [2021-05-03 13:50:08,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3973 to 3873. [2021-05-03 13:50:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3872 states have (on average 2.424586776859504) internal successors, (9388), 3872 states have internal predecessors, (9388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 9388 transitions. [2021-05-03 13:50:08,473 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 9388 transitions. Word has length 29 [2021-05-03 13:50:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,473 INFO L480 AbstractCegarLoop]: Abstraction has 3873 states and 9388 transitions. [2021-05-03 13:50:08,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 9388 transitions. [2021-05-03 13:50:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 13:50:08,476 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,476 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:08,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,677 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:08,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:08,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1902637985, now seen corresponding path program 26 times [2021-05-03 13:50:08,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:08,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633888735] [2021-05-03 13:50:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633888735] [2021-05-03 13:50:08,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211928964] [2021-05-03 13:50:08,719 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:08,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 13:50:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:08,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:08,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-03 13:50:08,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727181578] [2021-05-03 13:50:08,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:08,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:08,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:08,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:08,786 INFO L87 Difference]: Start difference. First operand 3873 states and 9388 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:08,855 INFO L93 Difference]: Finished difference Result 3970 states and 9396 transitions. [2021-05-03 13:50:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 13:50:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 13:50:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:08,858 INFO L225 Difference]: With dead ends: 3970 [2021-05-03 13:50:08,859 INFO L226 Difference]: Without dead ends: 3967 [2021-05-03 13:50:08,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:08,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2021-05-03 13:50:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 3722. [2021-05-03 13:50:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3721 states have (on average 2.3931738779897875) internal successors, (8905), 3721 states have internal predecessors, (8905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 8905 transitions. [2021-05-03 13:50:08,912 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 8905 transitions. Word has length 29 [2021-05-03 13:50:08,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:08,912 INFO L480 AbstractCegarLoop]: Abstraction has 3722 states and 8905 transitions. [2021-05-03 13:50:08,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 8905 transitions. [2021-05-03 13:50:08,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 13:50:08,915 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:08,915 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:09,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-03 13:50:09,122 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:09,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1685054023, now seen corresponding path program 27 times [2021-05-03 13:50:09,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:09,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249802089] [2021-05-03 13:50:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:09,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249802089] [2021-05-03 13:50:09,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369045289] [2021-05-03 13:50:09,267 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:09,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:50:09,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:09,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 13:50:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:09,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:09,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 13:50:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77174017] [2021-05-03 13:50:09,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:50:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:50:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:09,529 INFO L87 Difference]: Start difference. First operand 3722 states and 8905 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:10,534 INFO L93 Difference]: Finished difference Result 4929 states and 11573 transitions. [2021-05-03 13:50:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 13:50:10,535 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 13:50:10,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:10,539 INFO L225 Difference]: With dead ends: 4929 [2021-05-03 13:50:10,539 INFO L226 Difference]: Without dead ends: 4855 [2021-05-03 13:50:10,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 865.4ms TimeCoverageRelationStatistics Valid=257, Invalid=2193, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:50:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4855 states. [2021-05-03 13:50:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4855 to 4204. [2021-05-03 13:50:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 4203 states have (on average 2.3925767309064954) internal successors, (10056), 4203 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 10056 transitions. [2021-05-03 13:50:10,610 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 10056 transitions. Word has length 31 [2021-05-03 13:50:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:10,610 INFO L480 AbstractCegarLoop]: Abstraction has 4204 states and 10056 transitions. [2021-05-03 13:50:10,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 10056 transitions. [2021-05-03 13:50:10,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 13:50:10,614 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:10,614 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:10,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 13:50:10,822 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:10,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1536626305, now seen corresponding path program 28 times [2021-05-03 13:50:10,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:10,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257708941] [2021-05-03 13:50:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257708941] [2021-05-03 13:50:10,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326228596] [2021-05-03 13:50:10,949 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:10,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 13:50:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:11,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:11,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 13:50:11,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760910359] [2021-05-03 13:50:11,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:50:11,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:11,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:50:11,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:11,191 INFO L87 Difference]: Start difference. First operand 4204 states and 10056 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:12,146 INFO L93 Difference]: Finished difference Result 5234 states and 12282 transitions. [2021-05-03 13:50:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:50:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 13:50:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:12,152 INFO L225 Difference]: With dead ends: 5234 [2021-05-03 13:50:12,152 INFO L226 Difference]: Without dead ends: 5194 [2021-05-03 13:50:12,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 740.6ms TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:50:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-05-03 13:50:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4469. [2021-05-03 13:50:12,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 4468 states have (on average 2.3983885407341092) internal successors, (10716), 4468 states have internal predecessors, (10716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 10716 transitions. [2021-05-03 13:50:12,204 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 10716 transitions. Word has length 31 [2021-05-03 13:50:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:12,204 INFO L480 AbstractCegarLoop]: Abstraction has 4469 states and 10716 transitions. [2021-05-03 13:50:12,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 10716 transitions. [2021-05-03 13:50:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 13:50:12,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:12,208 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:12,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 13:50:12,409 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:12,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1216603777, now seen corresponding path program 29 times [2021-05-03 13:50:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:12,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919082547] [2021-05-03 13:50:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:12,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919082547] [2021-05-03 13:50:12,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998486678] [2021-05-03 13:50:12,524 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:12,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:50:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 13:50:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:12,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:12,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 13:50:12,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393567425] [2021-05-03 13:50:12,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:50:12,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:50:12,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:12,802 INFO L87 Difference]: Start difference. First operand 4469 states and 10716 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:13,822 INFO L93 Difference]: Finished difference Result 5435 states and 12809 transitions. [2021-05-03 13:50:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:50:13,822 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 13:50:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:13,828 INFO L225 Difference]: With dead ends: 5435 [2021-05-03 13:50:13,828 INFO L226 Difference]: Without dead ends: 5402 [2021-05-03 13:50:13,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 839.0ms TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:50:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2021-05-03 13:50:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 4799. [2021-05-03 13:50:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4799 states, 4798 states have (on average 2.4022509378907877) internal successors, (11526), 4798 states have internal predecessors, (11526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4799 states to 4799 states and 11526 transitions. [2021-05-03 13:50:13,891 INFO L78 Accepts]: Start accepts. Automaton has 4799 states and 11526 transitions. Word has length 31 [2021-05-03 13:50:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:13,891 INFO L480 AbstractCegarLoop]: Abstraction has 4799 states and 11526 transitions. [2021-05-03 13:50:13,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4799 states and 11526 transitions. [2021-05-03 13:50:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 13:50:13,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:13,895 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:14,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 13:50:14,108 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:14,109 INFO L82 PathProgramCache]: Analyzing trace with hash 269169127, now seen corresponding path program 30 times [2021-05-03 13:50:14,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:14,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814287031] [2021-05-03 13:50:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:14,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814287031] [2021-05-03 13:50:14,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510660954] [2021-05-03 13:50:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:14,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:50:14,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:14,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 13:50:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:14,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:14,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 13:50:14,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940520214] [2021-05-03 13:50:14,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:50:14,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:50:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:14,515 INFO L87 Difference]: Start difference. First operand 4799 states and 11526 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:15,362 INFO L93 Difference]: Finished difference Result 5530 states and 13106 transitions. [2021-05-03 13:50:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:50:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 13:50:15,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:15,367 INFO L225 Difference]: With dead ends: 5530 [2021-05-03 13:50:15,367 INFO L226 Difference]: Without dead ends: 5486 [2021-05-03 13:50:15,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:50:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-05-03 13:50:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 5052. [2021-05-03 13:50:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.404474361512572) internal successors, (12145), 5051 states have internal predecessors, (12145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 12145 transitions. [2021-05-03 13:50:15,429 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 12145 transitions. Word has length 31 [2021-05-03 13:50:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:15,429 INFO L480 AbstractCegarLoop]: Abstraction has 5052 states and 12145 transitions. [2021-05-03 13:50:15,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 12145 transitions. [2021-05-03 13:50:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:15,433 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:15,433 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:15,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 13:50:15,645 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:15,646 INFO L82 PathProgramCache]: Analyzing trace with hash 192336266, now seen corresponding path program 31 times [2021-05-03 13:50:15,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:15,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803196496] [2021-05-03 13:50:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:15,757 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803196496] [2021-05-03 13:50:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868633973] [2021-05-03 13:50:15,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:15,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:15,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 13:50:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044539924] [2021-05-03 13:50:15,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:50:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:50:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:15,988 INFO L87 Difference]: Start difference. First operand 5052 states and 12145 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:16,371 INFO L93 Difference]: Finished difference Result 5662 states and 13472 transitions. [2021-05-03 13:50:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:50:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:16,377 INFO L225 Difference]: With dead ends: 5662 [2021-05-03 13:50:16,377 INFO L226 Difference]: Without dead ends: 5648 [2021-05-03 13:50:16,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5648 states. [2021-05-03 13:50:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5648 to 5352. [2021-05-03 13:50:16,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 2.4075873668473182) internal successors, (12883), 5351 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 12883 transitions. [2021-05-03 13:50:16,442 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 12883 transitions. Word has length 32 [2021-05-03 13:50:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:16,452 INFO L480 AbstractCegarLoop]: Abstraction has 5352 states and 12883 transitions. [2021-05-03 13:50:16,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 12883 transitions. [2021-05-03 13:50:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:16,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:16,456 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:16,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 13:50:16,671 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:16,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1042547118, now seen corresponding path program 32 times [2021-05-03 13:50:16,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:16,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145351585] [2021-05-03 13:50:16,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145351585] [2021-05-03 13:50:16,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118185613] [2021-05-03 13:50:16,816 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:16,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:16,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:17,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:17,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 13:50:17,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269937940] [2021-05-03 13:50:17,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:50:17,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:17,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:50:17,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:17,008 INFO L87 Difference]: Start difference. First operand 5352 states and 12883 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:17,423 INFO L93 Difference]: Finished difference Result 5807 states and 13850 transitions. [2021-05-03 13:50:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:17,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:17,429 INFO L225 Difference]: With dead ends: 5807 [2021-05-03 13:50:17,429 INFO L226 Difference]: Without dead ends: 5793 [2021-05-03 13:50:17,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5793 states. [2021-05-03 13:50:17,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5793 to 5524. [2021-05-03 13:50:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 2.4110085098678256) internal successors, (13316), 5523 states have internal predecessors, (13316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 13316 transitions. [2021-05-03 13:50:17,497 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 13316 transitions. Word has length 32 [2021-05-03 13:50:17,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:17,497 INFO L480 AbstractCegarLoop]: Abstraction has 5524 states and 13316 transitions. [2021-05-03 13:50:17,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 13316 transitions. [2021-05-03 13:50:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:17,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:17,501 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:17,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 13:50:17,717 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash -785972854, now seen corresponding path program 33 times [2021-05-03 13:50:17,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:17,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708941900] [2021-05-03 13:50:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:17,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708941900] [2021-05-03 13:50:17,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570114410] [2021-05-03 13:50:17,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:17,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:17,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:17,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:18,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:18,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:18,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996042202] [2021-05-03 13:50:18,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:18,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:18,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:18,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:18,027 INFO L87 Difference]: Start difference. First operand 5524 states and 13316 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:18,584 INFO L93 Difference]: Finished difference Result 6674 states and 15890 transitions. [2021-05-03 13:50:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:50:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:18,590 INFO L225 Difference]: With dead ends: 6674 [2021-05-03 13:50:18,590 INFO L226 Difference]: Without dead ends: 6644 [2021-05-03 13:50:18,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 434.6ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:18,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6644 states. [2021-05-03 13:50:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6644 to 5926. [2021-05-03 13:50:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 2.416877637130802) internal successors, (14320), 5925 states have internal predecessors, (14320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 14320 transitions. [2021-05-03 13:50:18,675 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 14320 transitions. Word has length 32 [2021-05-03 13:50:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:18,675 INFO L480 AbstractCegarLoop]: Abstraction has 5926 states and 14320 transitions. [2021-05-03 13:50:18,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 14320 transitions. [2021-05-03 13:50:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:18,679 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:18,679 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:18,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,880 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:18,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:18,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1229434194, now seen corresponding path program 34 times [2021-05-03 13:50:18,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:18,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658324964] [2021-05-03 13:50:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:18,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:18,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658324964] [2021-05-03 13:50:18,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135786739] [2021-05-03 13:50:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:18,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:18,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:18,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556351027] [2021-05-03 13:50:19,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:19,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:19,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:19,164 INFO L87 Difference]: Start difference. First operand 5926 states and 14320 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:19,531 INFO L93 Difference]: Finished difference Result 7466 states and 17775 transitions. [2021-05-03 13:50:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:50:19,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:19,538 INFO L225 Difference]: With dead ends: 7466 [2021-05-03 13:50:19,538 INFO L226 Difference]: Without dead ends: 7426 [2021-05-03 13:50:19,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:19,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-05-03 13:50:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6811. [2021-05-03 13:50:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6811 states, 6810 states have (on average 2.4252569750367106) internal successors, (16516), 6810 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6811 states to 6811 states and 16516 transitions. [2021-05-03 13:50:19,612 INFO L78 Accepts]: Start accepts. Automaton has 6811 states and 16516 transitions. Word has length 32 [2021-05-03 13:50:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:19,612 INFO L480 AbstractCegarLoop]: Abstraction has 6811 states and 16516 transitions. [2021-05-03 13:50:19,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 6811 states and 16516 transitions. [2021-05-03 13:50:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:19,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:19,617 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:19,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,817 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:19,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:19,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1606884228, now seen corresponding path program 35 times [2021-05-03 13:50:19,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:19,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355687314] [2021-05-03 13:50:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355687314] [2021-05-03 13:50:19,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466455408] [2021-05-03 13:50:19,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:19,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:50:19,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:19,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:20,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:20,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-03 13:50:20,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506620011] [2021-05-03 13:50:20,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:20,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:20,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:20,122 INFO L87 Difference]: Start difference. First operand 6811 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:20,520 INFO L93 Difference]: Finished difference Result 7186 states and 17309 transitions. [2021-05-03 13:50:20,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 13:50:20,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:20,528 INFO L225 Difference]: With dead ends: 7186 [2021-05-03 13:50:20,528 INFO L226 Difference]: Without dead ends: 7172 [2021-05-03 13:50:20,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:50:20,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7172 states. [2021-05-03 13:50:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7172 to 6996. [2021-05-03 13:50:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.4264474624731953) internal successors, (16973), 6995 states have internal predecessors, (16973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 16973 transitions. [2021-05-03 13:50:20,611 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 16973 transitions. Word has length 32 [2021-05-03 13:50:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:20,613 INFO L480 AbstractCegarLoop]: Abstraction has 6996 states and 16973 transitions. [2021-05-03 13:50:20,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:20,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 16973 transitions. [2021-05-03 13:50:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:20,618 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:20,618 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:20,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:20,837 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:20,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:20,837 INFO L82 PathProgramCache]: Analyzing trace with hash 665097084, now seen corresponding path program 36 times [2021-05-03 13:50:20,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:20,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620762355] [2021-05-03 13:50:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:20,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620762355] [2021-05-03 13:50:20,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15717081] [2021-05-03 13:50:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:20,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:50:20,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:20,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:21,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:21,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958350241] [2021-05-03 13:50:21,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:21,140 INFO L87 Difference]: Start difference. First operand 6996 states and 16973 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:21,486 INFO L93 Difference]: Finished difference Result 8381 states and 20098 transitions. [2021-05-03 13:50:21,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:50:21,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:21,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:21,495 INFO L225 Difference]: With dead ends: 8381 [2021-05-03 13:50:21,495 INFO L226 Difference]: Without dead ends: 8341 [2021-05-03 13:50:21,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:50:21,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2021-05-03 13:50:21,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 7795. [2021-05-03 13:50:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7795 states, 7794 states have (on average 2.4280215550423403) internal successors, (18924), 7794 states have internal predecessors, (18924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7795 states to 7795 states and 18924 transitions. [2021-05-03 13:50:21,609 INFO L78 Accepts]: Start accepts. Automaton has 7795 states and 18924 transitions. Word has length 32 [2021-05-03 13:50:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:21,609 INFO L480 AbstractCegarLoop]: Abstraction has 7795 states and 18924 transitions. [2021-05-03 13:50:21,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7795 states and 18924 transitions. [2021-05-03 13:50:21,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:21,615 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:21,615 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:21,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-03 13:50:21,815 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash -781323630, now seen corresponding path program 37 times [2021-05-03 13:50:21,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:21,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154949358] [2021-05-03 13:50:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:21,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154949358] [2021-05-03 13:50:21,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388578729] [2021-05-03 13:50:21,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:21,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:22,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 13:50:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885492429] [2021-05-03 13:50:22,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:50:22,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:22,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:50:22,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:22,126 INFO L87 Difference]: Start difference. First operand 7795 states and 18924 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:22,701 INFO L93 Difference]: Finished difference Result 9510 states and 22724 transitions. [2021-05-03 13:50:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:50:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:22,710 INFO L225 Difference]: With dead ends: 9510 [2021-05-03 13:50:22,710 INFO L226 Difference]: Without dead ends: 9476 [2021-05-03 13:50:22,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:50:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9476 states. [2021-05-03 13:50:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9476 to 8348. [2021-05-03 13:50:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8347 states have (on average 2.434527375104828) internal successors, (20321), 8347 states have internal predecessors, (20321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 20321 transitions. [2021-05-03 13:50:22,804 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 20321 transitions. Word has length 32 [2021-05-03 13:50:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:22,804 INFO L480 AbstractCegarLoop]: Abstraction has 8348 states and 20321 transitions. [2021-05-03 13:50:22,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 20321 transitions. [2021-05-03 13:50:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:22,810 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:22,810 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:23,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:23,013 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:23,013 INFO L82 PathProgramCache]: Analyzing trace with hash 914060890, now seen corresponding path program 38 times [2021-05-03 13:50:23,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:23,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694950317] [2021-05-03 13:50:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:23,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694950317] [2021-05-03 13:50:23,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53075234] [2021-05-03 13:50:23,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:23,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:23,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:23,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:23,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:23,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677811202] [2021-05-03 13:50:23,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:23,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:23,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:23,325 INFO L87 Difference]: Start difference. First operand 8348 states and 20321 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:23,802 INFO L93 Difference]: Finished difference Result 9488 states and 22893 transitions. [2021-05-03 13:50:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:50:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:23,812 INFO L225 Difference]: With dead ends: 9488 [2021-05-03 13:50:23,812 INFO L226 Difference]: Without dead ends: 9449 [2021-05-03 13:50:23,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 424.3ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:50:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9449 states. [2021-05-03 13:50:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9449 to 8723. [2021-05-03 13:50:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.4369410685622563) internal successors, (21255), 8722 states have internal predecessors, (21255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 21255 transitions. [2021-05-03 13:50:23,909 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 21255 transitions. Word has length 32 [2021-05-03 13:50:23,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:23,910 INFO L480 AbstractCegarLoop]: Abstraction has 8723 states and 21255 transitions. [2021-05-03 13:50:23,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:23,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 21255 transitions. [2021-05-03 13:50:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:23,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:23,916 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:24,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:24,130 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:24,130 INFO L82 PathProgramCache]: Analyzing trace with hash 333478102, now seen corresponding path program 39 times [2021-05-03 13:50:24,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:24,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512982633] [2021-05-03 13:50:24,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:24,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512982633] [2021-05-03 13:50:24,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578671915] [2021-05-03 13:50:24,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:24,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:24,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:24,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:24,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:24,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:24,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840035487] [2021-05-03 13:50:24,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:24,405 INFO L87 Difference]: Start difference. First operand 8723 states and 21255 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:24,889 INFO L93 Difference]: Finished difference Result 11530 states and 27803 transitions. [2021-05-03 13:50:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:50:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:24,901 INFO L225 Difference]: With dead ends: 11530 [2021-05-03 13:50:24,901 INFO L226 Difference]: Without dead ends: 11490 [2021-05-03 13:50:24,901 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:50:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11490 states. [2021-05-03 13:50:25,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11490 to 9431. [2021-05-03 13:50:25,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9431 states, 9430 states have (on average 2.4407211028632028) internal successors, (23016), 9430 states have internal predecessors, (23016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9431 states to 9431 states and 23016 transitions. [2021-05-03 13:50:25,035 INFO L78 Accepts]: Start accepts. Automaton has 9431 states and 23016 transitions. Word has length 32 [2021-05-03 13:50:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:25,036 INFO L480 AbstractCegarLoop]: Abstraction has 9431 states and 23016 transitions. [2021-05-03 13:50:25,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9431 states and 23016 transitions. [2021-05-03 13:50:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:25,043 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:25,043 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:25,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 13:50:25,257 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1184169596, now seen corresponding path program 40 times [2021-05-03 13:50:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:25,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548835727] [2021-05-03 13:50:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:25,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548835727] [2021-05-03 13:50:25,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479032563] [2021-05-03 13:50:25,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:25,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:25,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:25,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:25,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:25,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2021-05-03 13:50:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93201216] [2021-05-03 13:50:25,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:50:25,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:25,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:50:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:25,539 INFO L87 Difference]: Start difference. First operand 9431 states and 23016 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:25,814 INFO L93 Difference]: Finished difference Result 10586 states and 25593 transitions. [2021-05-03 13:50:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:50:25,814 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:25,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:25,825 INFO L225 Difference]: With dead ends: 10586 [2021-05-03 13:50:25,825 INFO L226 Difference]: Without dead ends: 10559 [2021-05-03 13:50:25,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:25,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-05-03 13:50:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 10133. [2021-05-03 13:50:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.438709040663245) internal successors, (24709), 10132 states have internal predecessors, (24709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 24709 transitions. [2021-05-03 13:50:25,937 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 24709 transitions. Word has length 32 [2021-05-03 13:50:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:25,937 INFO L480 AbstractCegarLoop]: Abstraction has 10133 states and 24709 transitions. [2021-05-03 13:50:25,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 24709 transitions. [2021-05-03 13:50:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:25,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:25,943 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:26,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 13:50:26,143 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:26,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:26,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1122464136, now seen corresponding path program 41 times [2021-05-03 13:50:26,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:26,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207470459] [2021-05-03 13:50:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:26,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207470459] [2021-05-03 13:50:26,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550945761] [2021-05-03 13:50:26,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:26,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:50:26,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:26,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:26,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:26,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-05-03 13:50:26,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512617160] [2021-05-03 13:50:26,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 13:50:26,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 13:50:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 13:50:26,454 INFO L87 Difference]: Start difference. First operand 10133 states and 24709 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:26,798 INFO L93 Difference]: Finished difference Result 11077 states and 26854 transitions. [2021-05-03 13:50:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:50:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:26,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:26,809 INFO L225 Difference]: With dead ends: 11077 [2021-05-03 13:50:26,809 INFO L226 Difference]: Without dead ends: 11043 [2021-05-03 13:50:26,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 307.4ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2021-05-03 13:50:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10335. [2021-05-03 13:50:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10335 states, 10334 states have (on average 2.439713566866654) internal successors, (25212), 10334 states have internal predecessors, (25212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10335 states to 10335 states and 25212 transitions. [2021-05-03 13:50:26,928 INFO L78 Accepts]: Start accepts. Automaton has 10335 states and 25212 transitions. Word has length 32 [2021-05-03 13:50:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:26,928 INFO L480 AbstractCegarLoop]: Abstraction has 10335 states and 25212 transitions. [2021-05-03 13:50:26,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 10335 states and 25212 transitions. [2021-05-03 13:50:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 13:50:26,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:26,936 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:27,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-03 13:50:27,136 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:27,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1802356160, now seen corresponding path program 42 times [2021-05-03 13:50:27,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:27,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792756364] [2021-05-03 13:50:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:27,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:27,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792756364] [2021-05-03 13:50:27,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119592897] [2021-05-03 13:50:27,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:27,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:50:27,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 13:50:27,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:27,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:27,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:27,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-05-03 13:50:27,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833383480] [2021-05-03 13:50:27,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 13:50:27,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:27,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 13:50:27,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:27,421 INFO L87 Difference]: Start difference. First operand 10335 states and 25212 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:27,762 INFO L93 Difference]: Finished difference Result 11359 states and 27517 transitions. [2021-05-03 13:50:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:50:27,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 13:50:27,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:27,775 INFO L225 Difference]: With dead ends: 11359 [2021-05-03 13:50:27,776 INFO L226 Difference]: Without dead ends: 11319 [2021-05-03 13:50:27,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:50:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11319 states. [2021-05-03 13:50:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11319 to 10443. [2021-05-03 13:50:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10443 states, 10442 states have (on average 2.439666730511396) internal successors, (25475), 10442 states have internal predecessors, (25475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10443 states to 10443 states and 25475 transitions. [2021-05-03 13:50:27,907 INFO L78 Accepts]: Start accepts. Automaton has 10443 states and 25475 transitions. Word has length 32 [2021-05-03 13:50:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:27,907 INFO L480 AbstractCegarLoop]: Abstraction has 10443 states and 25475 transitions. [2021-05-03 13:50:27,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 10443 states and 25475 transitions. [2021-05-03 13:50:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 13:50:27,914 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:27,914 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:28,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,129 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:28,129 INFO L82 PathProgramCache]: Analyzing trace with hash -192221343, now seen corresponding path program 5 times [2021-05-03 13:50:28,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:28,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44078971] [2021-05-03 13:50:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-03 13:50:28,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44078971] [2021-05-03 13:50:28,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336481245] [2021-05-03 13:50:28,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:28,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:50:28,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:28,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 13:50:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-03 13:50:28,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:28,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-05-03 13:50:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655273776] [2021-05-03 13:50:28,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 13:50:28,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 13:50:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:28,513 INFO L87 Difference]: Start difference. First operand 10443 states and 25475 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:28,797 INFO L93 Difference]: Finished difference Result 10579 states and 25763 transitions. [2021-05-03 13:50:28,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:28,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 13:50:28,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:28,812 INFO L225 Difference]: With dead ends: 10579 [2021-05-03 13:50:28,812 INFO L226 Difference]: Without dead ends: 10480 [2021-05-03 13:50:28,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:50:28,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10480 states. [2021-05-03 13:50:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10480 to 10452. [2021-05-03 13:50:28,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.4395751602717444) internal successors, (25496), 10451 states have internal predecessors, (25496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 25496 transitions. [2021-05-03 13:50:28,958 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 25496 transitions. Word has length 33 [2021-05-03 13:50:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:28,958 INFO L480 AbstractCegarLoop]: Abstraction has 10452 states and 25496 transitions. [2021-05-03 13:50:28,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:28,959 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 25496 transitions. [2021-05-03 13:50:28,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:28,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:28,967 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:29,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,168 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -290320826, now seen corresponding path program 43 times [2021-05-03 13:50:29,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:29,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509043304] [2021-05-03 13:50:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:29,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:29,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509043304] [2021-05-03 13:50:29,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95761980] [2021-05-03 13:50:29,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:29,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:50:29,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:29,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:29,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-03 13:50:29,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295663091] [2021-05-03 13:50:29,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:29,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:29,288 INFO L87 Difference]: Start difference. First operand 10452 states and 25496 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:29,435 INFO L93 Difference]: Finished difference Result 13175 states and 31451 transitions. [2021-05-03 13:50:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:50:29,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:29,451 INFO L225 Difference]: With dead ends: 13175 [2021-05-03 13:50:29,451 INFO L226 Difference]: Without dead ends: 13175 [2021-05-03 13:50:29,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:50:29,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13175 states. [2021-05-03 13:50:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13175 to 10253. [2021-05-03 13:50:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 2.4039211861100274) internal successors, (24645), 10252 states have internal predecessors, (24645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 24645 transitions. [2021-05-03 13:50:29,582 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 24645 transitions. Word has length 35 [2021-05-03 13:50:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:29,582 INFO L480 AbstractCegarLoop]: Abstraction has 10253 states and 24645 transitions. [2021-05-03 13:50:29,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:29,582 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 24645 transitions. [2021-05-03 13:50:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:29,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:29,589 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:29,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,790 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:29,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:29,790 INFO L82 PathProgramCache]: Analyzing trace with hash 158288654, now seen corresponding path program 44 times [2021-05-03 13:50:29,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:29,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710819170] [2021-05-03 13:50:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:29,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710819170] [2021-05-03 13:50:29,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520975975] [2021-05-03 13:50:29,825 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:29,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:29,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:29,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 13:50:29,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:29,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:29,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-03 13:50:29,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723509428] [2021-05-03 13:50:29,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:50:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:50:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:29,933 INFO L87 Difference]: Start difference. First operand 10253 states and 24645 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:30,054 INFO L93 Difference]: Finished difference Result 9582 states and 22134 transitions. [2021-05-03 13:50:30,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:50:30,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:30,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:30,065 INFO L225 Difference]: With dead ends: 9582 [2021-05-03 13:50:30,065 INFO L226 Difference]: Without dead ends: 9546 [2021-05-03 13:50:30,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2021-05-03 13:50:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2021-05-03 13:50:30,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8819. [2021-05-03 13:50:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.325243819460195) internal successors, (20504), 8818 states have internal predecessors, (20504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20504 transitions. [2021-05-03 13:50:30,202 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20504 transitions. Word has length 35 [2021-05-03 13:50:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:30,202 INFO L480 AbstractCegarLoop]: Abstraction has 8819 states and 20504 transitions. [2021-05-03 13:50:30,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20504 transitions. [2021-05-03 13:50:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:30,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:30,208 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:30,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,409 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1330535575, now seen corresponding path program 45 times [2021-05-03 13:50:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:30,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124640541] [2021-05-03 13:50:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:30,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124640541] [2021-05-03 13:50:30,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802356434] [2021-05-03 13:50:30,442 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 13:50:30,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:30,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:30,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:30,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:30,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:50:30,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759826959] [2021-05-03 13:50:30,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:30,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:30,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:30,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:30,499 INFO L87 Difference]: Start difference. First operand 8819 states and 20504 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:30,565 INFO L93 Difference]: Finished difference Result 9119 states and 20973 transitions. [2021-05-03 13:50:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:30,572 INFO L225 Difference]: With dead ends: 9119 [2021-05-03 13:50:30,573 INFO L226 Difference]: Without dead ends: 9116 [2021-05-03 13:50:30,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9116 states. [2021-05-03 13:50:30,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9116 to 8819. [2021-05-03 13:50:30,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8819 states, 8818 states have (on average 2.3236561578589248) internal successors, (20490), 8818 states have internal predecessors, (20490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8819 states to 8819 states and 20490 transitions. [2021-05-03 13:50:30,672 INFO L78 Accepts]: Start accepts. Automaton has 8819 states and 20490 transitions. Word has length 35 [2021-05-03 13:50:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:30,672 INFO L480 AbstractCegarLoop]: Abstraction has 8819 states and 20490 transitions. [2021-05-03 13:50:30,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 8819 states and 20490 transitions. [2021-05-03 13:50:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:30,678 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:30,678 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:30,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 13:50:30,878 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:30,879 INFO L82 PathProgramCache]: Analyzing trace with hash 587893557, now seen corresponding path program 46 times [2021-05-03 13:50:30,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:30,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315451161] [2021-05-03 13:50:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:30,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315451161] [2021-05-03 13:50:30,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992646174] [2021-05-03 13:50:30,907 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:30,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:30,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:30,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:30,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:50:30,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:30,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:50:30,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328033658] [2021-05-03 13:50:30,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:30,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:30,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:30,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:30,970 INFO L87 Difference]: Start difference. First operand 8819 states and 20490 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:31,048 INFO L93 Difference]: Finished difference Result 11397 states and 26274 transitions. [2021-05-03 13:50:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:31,061 INFO L225 Difference]: With dead ends: 11397 [2021-05-03 13:50:31,061 INFO L226 Difference]: Without dead ends: 11397 [2021-05-03 13:50:31,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11397 states. [2021-05-03 13:50:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11397 to 10697. [2021-05-03 13:50:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10697 states, 10696 states have (on average 2.343025430067315) internal successors, (25061), 10696 states have internal predecessors, (25061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10697 states to 10697 states and 25061 transitions. [2021-05-03 13:50:31,181 INFO L78 Accepts]: Start accepts. Automaton has 10697 states and 25061 transitions. Word has length 35 [2021-05-03 13:50:31,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:31,181 INFO L480 AbstractCegarLoop]: Abstraction has 10697 states and 25061 transitions. [2021-05-03 13:50:31,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 10697 states and 25061 transitions. [2021-05-03 13:50:31,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:31,187 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:31,187 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:31,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,400 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1264948189, now seen corresponding path program 47 times [2021-05-03 13:50:31,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:31,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655973457] [2021-05-03 13:50:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:31,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655973457] [2021-05-03 13:50:31,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100464662] [2021-05-03 13:50:31,426 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:50:31,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:31,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:50:31,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40646127] [2021-05-03 13:50:31,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:31,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:31,491 INFO L87 Difference]: Start difference. First operand 10697 states and 25061 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:31,571 INFO L93 Difference]: Finished difference Result 11244 states and 25951 transitions. [2021-05-03 13:50:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:31,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:31,582 INFO L225 Difference]: With dead ends: 11244 [2021-05-03 13:50:31,582 INFO L226 Difference]: Without dead ends: 11238 [2021-05-03 13:50:31,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11238 states. [2021-05-03 13:50:31,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11238 to 9395. [2021-05-03 13:50:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 2.3070044709388973) internal successors, (21672), 9394 states have internal predecessors, (21672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 21672 transitions. [2021-05-03 13:50:31,713 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 21672 transitions. Word has length 35 [2021-05-03 13:50:31,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:31,714 INFO L480 AbstractCegarLoop]: Abstraction has 9395 states and 21672 transitions. [2021-05-03 13:50:31,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 6 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 21672 transitions. [2021-05-03 13:50:31,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:31,720 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:31,720 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:31,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 13:50:31,920 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:31,920 INFO L82 PathProgramCache]: Analyzing trace with hash -372624267, now seen corresponding path program 48 times [2021-05-03 13:50:31,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:31,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411185388] [2021-05-03 13:50:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411185388] [2021-05-03 13:50:31,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955358441] [2021-05-03 13:50:31,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:31,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:50:31,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:31,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:32,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:32,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 13:50:32,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795478052] [2021-05-03 13:50:32,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:32,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:32,014 INFO L87 Difference]: Start difference. First operand 9395 states and 21672 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:32,112 INFO L93 Difference]: Finished difference Result 9906 states and 22502 transitions. [2021-05-03 13:50:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:32,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:32,124 INFO L225 Difference]: With dead ends: 9906 [2021-05-03 13:50:32,124 INFO L226 Difference]: Without dead ends: 9894 [2021-05-03 13:50:32,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9894 states. [2021-05-03 13:50:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9894 to 9398. [2021-05-03 13:50:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.2974353517079917) internal successors, (21589), 9397 states have internal predecessors, (21589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21589 transitions. [2021-05-03 13:50:32,243 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21589 transitions. Word has length 35 [2021-05-03 13:50:32,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:32,243 INFO L480 AbstractCegarLoop]: Abstraction has 9398 states and 21589 transitions. [2021-05-03 13:50:32,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21589 transitions. [2021-05-03 13:50:32,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:32,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:32,250 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:32,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 13:50:32,451 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash 130843265, now seen corresponding path program 49 times [2021-05-03 13:50:32,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:32,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028045803] [2021-05-03 13:50:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028045803] [2021-05-03 13:50:32,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479329555] [2021-05-03 13:50:32,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:50:32,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:32,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 13:50:32,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394957532] [2021-05-03 13:50:32,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:32,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:32,536 INFO L87 Difference]: Start difference. First operand 9398 states and 21589 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:32,620 INFO L93 Difference]: Finished difference Result 10139 states and 22898 transitions. [2021-05-03 13:50:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:32,628 INFO L225 Difference]: With dead ends: 10139 [2021-05-03 13:50:32,628 INFO L226 Difference]: Without dead ends: 10139 [2021-05-03 13:50:32,628 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:50:32,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10139 states. [2021-05-03 13:50:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10139 to 9398. [2021-05-03 13:50:32,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9398 states, 9397 states have (on average 2.295200595934873) internal successors, (21568), 9397 states have internal predecessors, (21568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9398 states to 9398 states and 21568 transitions. [2021-05-03 13:50:32,728 INFO L78 Accepts]: Start accepts. Automaton has 9398 states and 21568 transitions. Word has length 35 [2021-05-03 13:50:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:32,728 INFO L480 AbstractCegarLoop]: Abstraction has 9398 states and 21568 transitions. [2021-05-03 13:50:32,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:32,728 INFO L276 IsEmpty]: Start isEmpty. Operand 9398 states and 21568 transitions. [2021-05-03 13:50:32,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:32,735 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:32,735 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:32,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,935 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:32,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:32,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1826378957, now seen corresponding path program 50 times [2021-05-03 13:50:32,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:32,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085776797] [2021-05-03 13:50:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:32,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085776797] [2021-05-03 13:50:32,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760013712] [2021-05-03 13:50:32,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:32,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:32,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:32,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:32,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:33,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:33,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:50:33,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430162765] [2021-05-03 13:50:33,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:33,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:33,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:33,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:33,038 INFO L87 Difference]: Start difference. First operand 9398 states and 21568 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:33,130 INFO L93 Difference]: Finished difference Result 11101 states and 25290 transitions. [2021-05-03 13:50:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:33,143 INFO L225 Difference]: With dead ends: 11101 [2021-05-03 13:50:33,143 INFO L226 Difference]: Without dead ends: 11101 [2021-05-03 13:50:33,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2021-05-03 13:50:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 10511. [2021-05-03 13:50:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.312464319695528) internal successors, (24304), 10510 states have internal predecessors, (24304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24304 transitions. [2021-05-03 13:50:33,296 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24304 transitions. Word has length 35 [2021-05-03 13:50:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:33,297 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24304 transitions. [2021-05-03 13:50:33,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24304 transitions. [2021-05-03 13:50:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:33,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:33,304 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:33,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 13:50:33,504 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1149324325, now seen corresponding path program 51 times [2021-05-03 13:50:33,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:33,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070948444] [2021-05-03 13:50:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:33,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070948444] [2021-05-03 13:50:33,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728792440] [2021-05-03 13:50:33,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:33,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:33,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:33,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:33,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:50:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041148916] [2021-05-03 13:50:33,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:50:33,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:50:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:50:33,582 INFO L87 Difference]: Start difference. First operand 10511 states and 24304 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:33,654 INFO L93 Difference]: Finished difference Result 11074 states and 25227 transitions. [2021-05-03 13:50:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:50:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:33,667 INFO L225 Difference]: With dead ends: 11074 [2021-05-03 13:50:33,667 INFO L226 Difference]: Without dead ends: 11071 [2021-05-03 13:50:33,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:50:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2021-05-03 13:50:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 10511. [2021-05-03 13:50:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3117031398667933) internal successors, (24296), 10510 states have internal predecessors, (24296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24296 transitions. [2021-05-03 13:50:33,792 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24296 transitions. Word has length 35 [2021-05-03 13:50:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:33,792 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24296 transitions. [2021-05-03 13:50:33,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24296 transitions. [2021-05-03 13:50:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:33,799 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:33,799 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:34,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,000 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070515, now seen corresponding path program 52 times [2021-05-03 13:50:34,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:34,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567217689] [2021-05-03 13:50:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:34,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567217689] [2021-05-03 13:50:34,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722767093] [2021-05-03 13:50:34,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:34,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:34,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:34,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:34,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:50:34,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:34,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 13:50:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498802604] [2021-05-03 13:50:34,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:50:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:50:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:50:34,092 INFO L87 Difference]: Start difference. First operand 10511 states and 24296 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:34,178 INFO L93 Difference]: Finished difference Result 11098 states and 25265 transitions. [2021-05-03 13:50:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:50:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:34,189 INFO L225 Difference]: With dead ends: 11098 [2021-05-03 13:50:34,190 INFO L226 Difference]: Without dead ends: 11086 [2021-05-03 13:50:34,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:50:34,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11086 states. [2021-05-03 13:50:34,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11086 to 10511. [2021-05-03 13:50:34,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10511 states, 10510 states have (on average 2.3078972407231206) internal successors, (24256), 10510 states have internal predecessors, (24256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10511 states to 10511 states and 24256 transitions. [2021-05-03 13:50:34,309 INFO L78 Accepts]: Start accepts. Automaton has 10511 states and 24256 transitions. Word has length 35 [2021-05-03 13:50:34,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:34,309 INFO L480 AbstractCegarLoop]: Abstraction has 10511 states and 24256 transitions. [2021-05-03 13:50:34,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,309 INFO L276 IsEmpty]: Start isEmpty. Operand 10511 states and 24256 transitions. [2021-05-03 13:50:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 13:50:34,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:34,315 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:34,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-03 13:50:34,516 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:34,516 INFO L82 PathProgramCache]: Analyzing trace with hash 452716695, now seen corresponding path program 53 times [2021-05-03 13:50:34,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:34,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053627446] [2021-05-03 13:50:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053627446] [2021-05-03 13:50:34,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237444311] [2021-05-03 13:50:34,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:34,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 13:50:34,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:50:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:34,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:34,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 13:50:34,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864944814] [2021-05-03 13:50:34,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:50:34,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:50:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:50:34,630 INFO L87 Difference]: Start difference. First operand 10511 states and 24256 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:34,724 INFO L93 Difference]: Finished difference Result 11062 states and 25159 transitions. [2021-05-03 13:50:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:50:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 13:50:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:34,734 INFO L225 Difference]: With dead ends: 11062 [2021-05-03 13:50:34,734 INFO L226 Difference]: Without dead ends: 11039 [2021-05-03 13:50:34,734 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:50:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11039 states. [2021-05-03 13:50:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11039 to 10526. [2021-05-03 13:50:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10526 states, 10525 states have (on average 2.3065083135391924) internal successors, (24276), 10525 states have internal predecessors, (24276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10526 states to 10526 states and 24276 transitions. [2021-05-03 13:50:34,888 INFO L78 Accepts]: Start accepts. Automaton has 10526 states and 24276 transitions. Word has length 35 [2021-05-03 13:50:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:34,888 INFO L480 AbstractCegarLoop]: Abstraction has 10526 states and 24276 transitions. [2021-05-03 13:50:34,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10526 states and 24276 transitions. [2021-05-03 13:50:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 13:50:34,896 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:34,896 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:35,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,096 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 764681878, now seen corresponding path program 6 times [2021-05-03 13:50:35,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:35,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926668760] [2021-05-03 13:50:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 5 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926668760] [2021-05-03 13:50:35,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260908823] [2021-05-03 13:50:35,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:50:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:35,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 13:50:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:35,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 13:50:35,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530746285] [2021-05-03 13:50:35,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 13:50:35,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:35,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 13:50:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:50:35,221 INFO L87 Difference]: Start difference. First operand 10526 states and 24276 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:35,366 INFO L93 Difference]: Finished difference Result 11977 states and 27126 transitions. [2021-05-03 13:50:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 13:50:35,366 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 13:50:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:35,379 INFO L225 Difference]: With dead ends: 11977 [2021-05-03 13:50:35,379 INFO L226 Difference]: Without dead ends: 11977 [2021-05-03 13:50:35,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-05-03 13:50:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2021-05-03 13:50:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 10813. [2021-05-03 13:50:35,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 10812 states have (on average 2.3063263041065483) internal successors, (24936), 10812 states have internal predecessors, (24936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 24936 transitions. [2021-05-03 13:50:35,539 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 24936 transitions. Word has length 36 [2021-05-03 13:50:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:35,539 INFO L480 AbstractCegarLoop]: Abstraction has 10813 states and 24936 transitions. [2021-05-03 13:50:35,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:35,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 24936 transitions. [2021-05-03 13:50:35,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:35,548 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:35,548 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:35,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-03 13:50:35,763 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 871367890, now seen corresponding path program 54 times [2021-05-03 13:50:35,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:35,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60199350] [2021-05-03 13:50:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:35,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60199350] [2021-05-03 13:50:35,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505258846] [2021-05-03 13:50:35,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:35,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:50:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:35,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:35,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:36,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:36,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:36,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383828478] [2021-05-03 13:50:36,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:36,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:36,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:36,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:36,209 INFO L87 Difference]: Start difference. First operand 10813 states and 24936 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:36,818 INFO L93 Difference]: Finished difference Result 11896 states and 27360 transitions. [2021-05-03 13:50:36,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:50:36,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:36,830 INFO L225 Difference]: With dead ends: 11896 [2021-05-03 13:50:36,830 INFO L226 Difference]: Without dead ends: 11879 [2021-05-03 13:50:36,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:50:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11879 states. [2021-05-03 13:50:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11879 to 11426. [2021-05-03 13:50:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11426 states, 11425 states have (on average 2.312910284463895) internal successors, (26425), 11425 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11426 states to 11426 states and 26425 transitions. [2021-05-03 13:50:36,957 INFO L78 Accepts]: Start accepts. Automaton has 11426 states and 26425 transitions. Word has length 38 [2021-05-03 13:50:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:36,957 INFO L480 AbstractCegarLoop]: Abstraction has 11426 states and 26425 transitions. [2021-05-03 13:50:36,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11426 states and 26425 transitions. [2021-05-03 13:50:36,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:36,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:36,965 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:37,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:37,166 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:37,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:37,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1331528806, now seen corresponding path program 55 times [2021-05-03 13:50:37,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:37,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12050754] [2021-05-03 13:50:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:37,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12050754] [2021-05-03 13:50:37,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427337549] [2021-05-03 13:50:37,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:37,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:37,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:37,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21154670] [2021-05-03 13:50:37,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:37,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:37,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:37,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:37,675 INFO L87 Difference]: Start difference. First operand 11426 states and 26425 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:38,202 INFO L93 Difference]: Finished difference Result 12194 states and 28106 transitions. [2021-05-03 13:50:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:38,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:38,215 INFO L225 Difference]: With dead ends: 12194 [2021-05-03 13:50:38,215 INFO L226 Difference]: Without dead ends: 12177 [2021-05-03 13:50:38,215 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:38,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-05-03 13:50:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 11804. [2021-05-03 13:50:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11804 states, 11803 states have (on average 2.3180547318478353) internal successors, (27360), 11803 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11804 states to 11804 states and 27360 transitions. [2021-05-03 13:50:38,344 INFO L78 Accepts]: Start accepts. Automaton has 11804 states and 27360 transitions. Word has length 38 [2021-05-03 13:50:38,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:38,344 INFO L480 AbstractCegarLoop]: Abstraction has 11804 states and 27360 transitions. [2021-05-03 13:50:38,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 11804 states and 27360 transitions. [2021-05-03 13:50:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:38,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:38,352 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:38,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 13:50:38,553 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:38,553 INFO L82 PathProgramCache]: Analyzing trace with hash 549205202, now seen corresponding path program 56 times [2021-05-03 13:50:38,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:38,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634041031] [2021-05-03 13:50:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:38,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634041031] [2021-05-03 13:50:38,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941190808] [2021-05-03 13:50:38,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:38,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:39,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:39,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2584818] [2021-05-03 13:50:39,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:39,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:39,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:39,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:39,012 INFO L87 Difference]: Start difference. First operand 11804 states and 27360 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:39,663 INFO L93 Difference]: Finished difference Result 12640 states and 29196 transitions. [2021-05-03 13:50:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:39,664 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:39,677 INFO L225 Difference]: With dead ends: 12640 [2021-05-03 13:50:39,678 INFO L226 Difference]: Without dead ends: 12623 [2021-05-03 13:50:39,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:50:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-05-03 13:50:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 12181. [2021-05-03 13:50:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12181 states, 12180 states have (on average 2.3230706075533663) internal successors, (28295), 12180 states have internal predecessors, (28295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 28295 transitions. [2021-05-03 13:50:39,832 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 28295 transitions. Word has length 38 [2021-05-03 13:50:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:39,833 INFO L480 AbstractCegarLoop]: Abstraction has 12181 states and 28295 transitions. [2021-05-03 13:50:39,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 28295 transitions. [2021-05-03 13:50:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:39,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:39,841 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:40,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:40,049 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash -888682854, now seen corresponding path program 57 times [2021-05-03 13:50:40,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:40,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368583440] [2021-05-03 13:50:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:40,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368583440] [2021-05-03 13:50:40,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066751937] [2021-05-03 13:50:40,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:40,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:50:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:40,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:40,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:50:40,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623884398] [2021-05-03 13:50:40,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:50:40,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:40,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:50:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:40,494 INFO L87 Difference]: Start difference. First operand 12181 states and 28295 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:41,476 INFO L93 Difference]: Finished difference Result 15043 states and 34569 transitions. [2021-05-03 13:50:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:50:41,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:41,490 INFO L225 Difference]: With dead ends: 15043 [2021-05-03 13:50:41,491 INFO L226 Difference]: Without dead ends: 15009 [2021-05-03 13:50:41,491 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 663.6ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:50:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15009 states. [2021-05-03 13:50:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15009 to 12800. [2021-05-03 13:50:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 12799 states have (on average 2.3282287678724902) internal successors, (29799), 12799 states have internal predecessors, (29799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 29799 transitions. [2021-05-03 13:50:41,639 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 29799 transitions. Word has length 38 [2021-05-03 13:50:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:41,639 INFO L480 AbstractCegarLoop]: Abstraction has 12800 states and 29799 transitions. [2021-05-03 13:50:41,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 29799 transitions. [2021-05-03 13:50:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:41,648 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:41,648 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:41,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 13:50:41,849 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 754853330, now seen corresponding path program 58 times [2021-05-03 13:50:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:41,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893962005] [2021-05-03 13:50:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:42,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893962005] [2021-05-03 13:50:42,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13936385] [2021-05-03 13:50:42,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:42,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:42,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:42,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:42,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:50:42,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636260627] [2021-05-03 13:50:42,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:50:42,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:50:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:42,327 INFO L87 Difference]: Start difference. First operand 12800 states and 29799 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:42,898 INFO L93 Difference]: Finished difference Result 14047 states and 32541 transitions. [2021-05-03 13:50:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:50:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:42,913 INFO L225 Difference]: With dead ends: 14047 [2021-05-03 13:50:42,914 INFO L226 Difference]: Without dead ends: 14013 [2021-05-03 13:50:42,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:42,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14013 states. [2021-05-03 13:50:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14013 to 13526. [2021-05-03 13:50:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13526 states, 13525 states have (on average 2.3326432532347505) internal successors, (31549), 13525 states have internal predecessors, (31549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13526 states to 13526 states and 31549 transitions. [2021-05-03 13:50:43,074 INFO L78 Accepts]: Start accepts. Automaton has 13526 states and 31549 transitions. Word has length 38 [2021-05-03 13:50:43,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:43,074 INFO L480 AbstractCegarLoop]: Abstraction has 13526 states and 31549 transitions. [2021-05-03 13:50:43,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:43,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13526 states and 31549 transitions. [2021-05-03 13:50:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:43,082 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:43,083 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:43,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-03 13:50:43,283 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash 74961306, now seen corresponding path program 59 times [2021-05-03 13:50:43,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:43,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813830700] [2021-05-03 13:50:43,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:43,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813830700] [2021-05-03 13:50:43,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671503831] [2021-05-03 13:50:43,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:43,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:50:43,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:43,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:43,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:43,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:43,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:50:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574695568] [2021-05-03 13:50:43,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:50:43,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:43,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:50:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:43,756 INFO L87 Difference]: Start difference. First operand 13526 states and 31549 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:44,429 INFO L93 Difference]: Finished difference Result 16913 states and 39161 transitions. [2021-05-03 13:50:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:50:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:44,446 INFO L225 Difference]: With dead ends: 16913 [2021-05-03 13:50:44,446 INFO L226 Difference]: Without dead ends: 16870 [2021-05-03 13:50:44,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:50:44,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16870 states. [2021-05-03 13:50:44,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16870 to 15557. [2021-05-03 13:50:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15557 states, 15556 states have (on average 2.3482257649781433) internal successors, (36529), 15556 states have internal predecessors, (36529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15557 states to 15557 states and 36529 transitions. [2021-05-03 13:50:44,670 INFO L78 Accepts]: Start accepts. Automaton has 15557 states and 36529 transitions. Word has length 38 [2021-05-03 13:50:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:44,671 INFO L480 AbstractCegarLoop]: Abstraction has 15557 states and 36529 transitions. [2021-05-03 13:50:44,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 15557 states and 36529 transitions. [2021-05-03 13:50:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:44,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:44,680 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:44,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 13:50:44,881 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:44,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1894044010, now seen corresponding path program 60 times [2021-05-03 13:50:44,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:44,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537664346] [2021-05-03 13:50:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:45,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537664346] [2021-05-03 13:50:45,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317608396] [2021-05-03 13:50:45,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:50:45,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:50:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:45,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:45,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:45,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508564685] [2021-05-03 13:50:45,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:45,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:45,332 INFO L87 Difference]: Start difference. First operand 15557 states and 36529 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:45,940 INFO L93 Difference]: Finished difference Result 16313 states and 38191 transitions. [2021-05-03 13:50:45,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:45,941 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:45,958 INFO L225 Difference]: With dead ends: 16313 [2021-05-03 13:50:45,958 INFO L226 Difference]: Without dead ends: 16296 [2021-05-03 13:50:45,959 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:50:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-05-03 13:50:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 15947. [2021-05-03 13:50:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15947 states, 15946 states have (on average 2.3511225385676657) internal successors, (37491), 15946 states have internal predecessors, (37491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15947 states to 15947 states and 37491 transitions. [2021-05-03 13:50:46,146 INFO L78 Accepts]: Start accepts. Automaton has 15947 states and 37491 transitions. Word has length 38 [2021-05-03 13:50:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:46,146 INFO L480 AbstractCegarLoop]: Abstraction has 15947 states and 37491 transitions. [2021-05-03 13:50:46,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 15947 states and 37491 transitions. [2021-05-03 13:50:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:46,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:46,155 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:46,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:46,356 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:46,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1716041940, now seen corresponding path program 61 times [2021-05-03 13:50:46,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:46,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992655267] [2021-05-03 13:50:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:46,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:46,571 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-05-03 13:50:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:46,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992655267] [2021-05-03 13:50:46,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592389416] [2021-05-03 13:50:46,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:46,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:46,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:46,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177591781] [2021-05-03 13:50:46,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:46,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:46,978 INFO L87 Difference]: Start difference. First operand 15947 states and 37491 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:47,549 INFO L93 Difference]: Finished difference Result 16694 states and 39131 transitions. [2021-05-03 13:50:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:47,568 INFO L225 Difference]: With dead ends: 16694 [2021-05-03 13:50:47,568 INFO L226 Difference]: Without dead ends: 16677 [2021-05-03 13:50:47,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16677 states. [2021-05-03 13:50:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16677 to 16317. [2021-05-03 13:50:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16317 states, 16316 states have (on average 2.3539470458445697) internal successors, (38407), 16316 states have internal predecessors, (38407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16317 states to 16317 states and 38407 transitions. [2021-05-03 13:50:47,788 INFO L78 Accepts]: Start accepts. Automaton has 16317 states and 38407 transitions. Word has length 38 [2021-05-03 13:50:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:47,788 INFO L480 AbstractCegarLoop]: Abstraction has 16317 states and 38407 transitions. [2021-05-03 13:50:47,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 16317 states and 38407 transitions. [2021-05-03 13:50:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:47,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:47,797 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:47,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:47,998 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash -520054204, now seen corresponding path program 62 times [2021-05-03 13:50:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:47,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620864956] [2021-05-03 13:50:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:48,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620864956] [2021-05-03 13:50:48,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121240049] [2021-05-03 13:50:48,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:48,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:48,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:48,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:48,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:48,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936514067] [2021-05-03 13:50:48,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:48,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:48,396 INFO L87 Difference]: Start difference. First operand 16317 states and 38407 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:49,053 INFO L93 Difference]: Finished difference Result 16910 states and 39707 transitions. [2021-05-03 13:50:49,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:49,072 INFO L225 Difference]: With dead ends: 16910 [2021-05-03 13:50:49,072 INFO L226 Difference]: Without dead ends: 16893 [2021-05-03 13:50:49,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 490.2ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16893 states. [2021-05-03 13:50:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16893 to 16652. [2021-05-03 13:50:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16652 states, 16651 states have (on average 2.3558945408684164) internal successors, (39228), 16651 states have internal predecessors, (39228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 39228 transitions. [2021-05-03 13:50:49,258 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 39228 transitions. Word has length 38 [2021-05-03 13:50:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:49,258 INFO L480 AbstractCegarLoop]: Abstraction has 16652 states and 39228 transitions. [2021-05-03 13:50:49,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 39228 transitions. [2021-05-03 13:50:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:49,267 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:49,268 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:49,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,468 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1360679804, now seen corresponding path program 63 times [2021-05-03 13:50:49,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:49,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767690804] [2021-05-03 13:50:49,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:49,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767690804] [2021-05-03 13:50:49,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951905044] [2021-05-03 13:50:49,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:49,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:50:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:49,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:49,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:49,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 13:50:49,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290224060] [2021-05-03 13:50:49,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 13:50:49,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 13:50:49,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:50:49,961 INFO L87 Difference]: Start difference. First operand 16652 states and 39228 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:51,041 INFO L93 Difference]: Finished difference Result 18935 states and 44264 transitions. [2021-05-03 13:50:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:50:51,042 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:51,064 INFO L225 Difference]: With dead ends: 18935 [2021-05-03 13:50:51,064 INFO L226 Difference]: Without dead ends: 18918 [2021-05-03 13:50:51,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 744.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1567, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:50:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2021-05-03 13:50:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 17289. [2021-05-03 13:50:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17289 states, 17288 states have (on average 2.3604812586765385) internal successors, (40808), 17288 states have internal predecessors, (40808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17289 states to 17289 states and 40808 transitions. [2021-05-03 13:50:51,281 INFO L78 Accepts]: Start accepts. Automaton has 17289 states and 40808 transitions. Word has length 38 [2021-05-03 13:50:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:51,281 INFO L480 AbstractCegarLoop]: Abstraction has 17289 states and 40808 transitions. [2021-05-03 13:50:51,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 17289 states and 40808 transitions. [2021-05-03 13:50:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:51,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:51,291 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:51,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-03 13:50:51,492 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1566327932, now seen corresponding path program 64 times [2021-05-03 13:50:51,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:51,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678038302] [2021-05-03 13:50:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678038302] [2021-05-03 13:50:51,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106976014] [2021-05-03 13:50:51,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:51,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:50:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:51,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:51,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:50:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703739159] [2021-05-03 13:50:51,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:50:51,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:50:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:50:51,904 INFO L87 Difference]: Start difference. First operand 17289 states and 40808 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:52,465 INFO L93 Difference]: Finished difference Result 17863 states and 42004 transitions. [2021-05-03 13:50:52,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:50:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:52,486 INFO L225 Difference]: With dead ends: 17863 [2021-05-03 13:50:52,486 INFO L226 Difference]: Without dead ends: 17829 [2021-05-03 13:50:52,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 493.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:50:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17829 states. [2021-05-03 13:50:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17829 to 17547. [2021-05-03 13:50:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17547 states, 17546 states have (on average 2.358828222956799) internal successors, (41388), 17546 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17547 states to 17547 states and 41388 transitions. [2021-05-03 13:50:52,787 INFO L78 Accepts]: Start accepts. Automaton has 17547 states and 41388 transitions. Word has length 38 [2021-05-03 13:50:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:52,788 INFO L480 AbstractCegarLoop]: Abstraction has 17547 states and 41388 transitions. [2021-05-03 13:50:52,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 17547 states and 41388 transitions. [2021-05-03 13:50:52,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:52,796 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:52,797 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:52,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:52,997 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:52,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:52,997 INFO L82 PathProgramCache]: Analyzing trace with hash 886435908, now seen corresponding path program 65 times [2021-05-03 13:50:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:52,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101041555] [2021-05-03 13:50:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:53,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101041555] [2021-05-03 13:50:53,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269572708] [2021-05-03 13:50:53,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:53,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:50:53,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:53,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:53,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:50:53,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:53,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:50:53,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470420576] [2021-05-03 13:50:53,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:50:53,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:50:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:50:53,424 INFO L87 Difference]: Start difference. First operand 17547 states and 41388 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:54,081 INFO L93 Difference]: Finished difference Result 20211 states and 47310 transitions. [2021-05-03 13:50:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:50:54,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:54,105 INFO L225 Difference]: With dead ends: 20211 [2021-05-03 13:50:54,105 INFO L226 Difference]: Without dead ends: 20168 [2021-05-03 13:50:54,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:50:54,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20168 states. [2021-05-03 13:50:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20168 to 18863. [2021-05-03 13:50:54,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18863 states, 18862 states have (on average 2.360089067967342) internal successors, (44516), 18862 states have internal predecessors, (44516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18863 states to 18863 states and 44516 transitions. [2021-05-03 13:50:54,333 INFO L78 Accepts]: Start accepts. Automaton has 18863 states and 44516 transitions. Word has length 38 [2021-05-03 13:50:54,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:54,333 INFO L480 AbstractCegarLoop]: Abstraction has 18863 states and 44516 transitions. [2021-05-03 13:50:54,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 18863 states and 44516 transitions. [2021-05-03 13:50:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:54,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:54,343 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:54,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:54,543 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:54,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1082569408, now seen corresponding path program 66 times [2021-05-03 13:50:54,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:54,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997176504] [2021-05-03 13:50:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:54,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997176504] [2021-05-03 13:50:54,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005331366] [2021-05-03 13:50:54,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:54,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:50:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:54,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:54,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:54,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:54,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203766179] [2021-05-03 13:50:54,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:54,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:54,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:54,956 INFO L87 Difference]: Start difference. First operand 18863 states and 44516 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:55,540 INFO L93 Difference]: Finished difference Result 19446 states and 45799 transitions. [2021-05-03 13:50:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:55,540 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:55,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:55,617 INFO L225 Difference]: With dead ends: 19446 [2021-05-03 13:50:55,617 INFO L226 Difference]: Without dead ends: 19429 [2021-05-03 13:50:55,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:50:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19429 states. [2021-05-03 13:50:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19429 to 19214. [2021-05-03 13:50:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19214 states, 19213 states have (on average 2.3614219538853902) internal successors, (45370), 19213 states have internal predecessors, (45370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19214 states to 19214 states and 45370 transitions. [2021-05-03 13:50:55,859 INFO L78 Accepts]: Start accepts. Automaton has 19214 states and 45370 transitions. Word has length 38 [2021-05-03 13:50:55,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:55,859 INFO L480 AbstractCegarLoop]: Abstraction has 19214 states and 45370 transitions. [2021-05-03 13:50:55,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:55,859 INFO L276 IsEmpty]: Start isEmpty. Operand 19214 states and 45370 transitions. [2021-05-03 13:50:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:55,869 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:55,869 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:56,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,070 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:56,070 INFO L82 PathProgramCache]: Analyzing trace with hash -904567338, now seen corresponding path program 67 times [2021-05-03 13:50:56,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:56,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153577258] [2021-05-03 13:50:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:56,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153577258] [2021-05-03 13:50:56,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458175926] [2021-05-03 13:50:56,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:56,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:56,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:56,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:56,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786048354] [2021-05-03 13:50:56,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:56,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:56,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:56,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:56,482 INFO L87 Difference]: Start difference. First operand 19214 states and 45370 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:57,021 INFO L93 Difference]: Finished difference Result 19790 states and 46635 transitions. [2021-05-03 13:50:57,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:50:57,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:57,045 INFO L225 Difference]: With dead ends: 19790 [2021-05-03 13:50:57,045 INFO L226 Difference]: Without dead ends: 19773 [2021-05-03 13:50:57,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19773 states. [2021-05-03 13:50:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19773 to 19545. [2021-05-03 13:50:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19545 states, 19544 states have (on average 2.362771182971756) internal successors, (46178), 19544 states have internal predecessors, (46178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19545 states to 19545 states and 46178 transitions. [2021-05-03 13:50:57,275 INFO L78 Accepts]: Start accepts. Automaton has 19545 states and 46178 transitions. Word has length 38 [2021-05-03 13:50:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:57,275 INFO L480 AbstractCegarLoop]: Abstraction has 19545 states and 46178 transitions. [2021-05-03 13:50:57,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 19545 states and 46178 transitions. [2021-05-03 13:50:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:57,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:57,286 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:57,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 13:50:57,486 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:57,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:57,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1183039526, now seen corresponding path program 68 times [2021-05-03 13:50:57,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:57,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602399871] [2021-05-03 13:50:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:57,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602399871] [2021-05-03 13:50:57,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637707044] [2021-05-03 13:50:57,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:57,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:50:57,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:57,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:57,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:57,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:57,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:57,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650827188] [2021-05-03 13:50:57,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:57,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:57,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:57,898 INFO L87 Difference]: Start difference. First operand 19545 states and 46178 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:50:58,477 INFO L93 Difference]: Finished difference Result 20173 states and 47556 transitions. [2021-05-03 13:50:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:50:58,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:50:58,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:50:58,497 INFO L225 Difference]: With dead ends: 20173 [2021-05-03 13:50:58,497 INFO L226 Difference]: Without dead ends: 20156 [2021-05-03 13:50:58,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:50:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20156 states. [2021-05-03 13:50:58,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20156 to 19862. [2021-05-03 13:50:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19862 states, 19861 states have (on average 2.3641307084235437) internal successors, (46954), 19861 states have internal predecessors, (46954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19862 states to 19862 states and 46954 transitions. [2021-05-03 13:50:58,768 INFO L78 Accepts]: Start accepts. Automaton has 19862 states and 46954 transitions. Word has length 38 [2021-05-03 13:50:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:50:58,768 INFO L480 AbstractCegarLoop]: Abstraction has 19862 states and 46954 transitions. [2021-05-03 13:50:58,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:50:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 19862 states and 46954 transitions. [2021-05-03 13:50:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:50:58,780 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:50:58,780 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:50:58,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:58,980 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:50:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:50:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1674039714, now seen corresponding path program 69 times [2021-05-03 13:50:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:50:58,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880684322] [2021-05-03 13:50:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:50:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:50:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:50:59,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880684322] [2021-05-03 13:50:59,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714340952] [2021-05-03 13:50:59,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:50:59,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:50:59,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:50:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:50:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:50:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:50:59,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:50:59,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:50:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733501135] [2021-05-03 13:50:59,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:50:59,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:50:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:50:59,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:50:59,363 INFO L87 Difference]: Start difference. First operand 19862 states and 46954 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:00,066 INFO L93 Difference]: Finished difference Result 20811 states and 49049 transitions. [2021-05-03 13:51:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:00,066 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:00,090 INFO L225 Difference]: With dead ends: 20811 [2021-05-03 13:51:00,090 INFO L226 Difference]: Without dead ends: 20777 [2021-05-03 13:51:00,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 550.4ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:51:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20777 states. [2021-05-03 13:51:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20777 to 20322. [2021-05-03 13:51:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20322 states, 20321 states have (on average 2.3653855617341666) internal successors, (48067), 20321 states have internal predecessors, (48067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20322 states to 20322 states and 48067 transitions. [2021-05-03 13:51:00,320 INFO L78 Accepts]: Start accepts. Automaton has 20322 states and 48067 transitions. Word has length 38 [2021-05-03 13:51:00,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:00,320 INFO L480 AbstractCegarLoop]: Abstraction has 20322 states and 48067 transitions. [2021-05-03 13:51:00,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:00,320 INFO L276 IsEmpty]: Start isEmpty. Operand 20322 states and 48067 transitions. [2021-05-03 13:51:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:00,333 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:00,333 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:00,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:00,533 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1657283422, now seen corresponding path program 70 times [2021-05-03 13:51:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:00,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014722120] [2021-05-03 13:51:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:00,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014722120] [2021-05-03 13:51:00,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275470000] [2021-05-03 13:51:00,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:00,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:00,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:00,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:00,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:51:00,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:00,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:51:00,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264920049] [2021-05-03 13:51:00,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:51:00,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:51:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:51:00,976 INFO L87 Difference]: Start difference. First operand 20322 states and 48067 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:01,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:01,797 INFO L93 Difference]: Finished difference Result 23109 states and 54288 transitions. [2021-05-03 13:51:01,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:51:01,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:01,819 INFO L225 Difference]: With dead ends: 23109 [2021-05-03 13:51:01,819 INFO L226 Difference]: Without dead ends: 23066 [2021-05-03 13:51:01,819 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23066 states. [2021-05-03 13:51:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23066 to 21748. [2021-05-03 13:51:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21748 states, 21747 states have (on average 2.3661194647537593) internal successors, (51456), 21747 states have internal predecessors, (51456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21748 states to 21748 states and 51456 transitions. [2021-05-03 13:51:02,057 INFO L78 Accepts]: Start accepts. Automaton has 21748 states and 51456 transitions. Word has length 38 [2021-05-03 13:51:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:02,057 INFO L480 AbstractCegarLoop]: Abstraction has 21748 states and 51456 transitions. [2021-05-03 13:51:02,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21748 states and 51456 transitions. [2021-05-03 13:51:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:02,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:02,071 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:02,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 13:51:02,271 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:02,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1558285236, now seen corresponding path program 71 times [2021-05-03 13:51:02,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:02,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482027322] [2021-05-03 13:51:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:02,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482027322] [2021-05-03 13:51:02,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782510267] [2021-05-03 13:51:02,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:02,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:51:02,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:02,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:02,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:02,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:51:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678436875] [2021-05-03 13:51:02,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:51:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:51:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:02,683 INFO L87 Difference]: Start difference. First operand 21748 states and 51456 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:03,399 INFO L93 Difference]: Finished difference Result 23617 states and 55513 transitions. [2021-05-03 13:51:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:03,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:03,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:03,427 INFO L225 Difference]: With dead ends: 23617 [2021-05-03 13:51:03,427 INFO L226 Difference]: Without dead ends: 23583 [2021-05-03 13:51:03,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:51:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23583 states. [2021-05-03 13:51:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23583 to 22217. [2021-05-03 13:51:03,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 22216 states have (on average 2.3653222902412674) internal successors, (52548), 22216 states have internal predecessors, (52548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 52548 transitions. [2021-05-03 13:51:03,688 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 52548 transitions. Word has length 38 [2021-05-03 13:51:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:03,688 INFO L480 AbstractCegarLoop]: Abstraction has 22217 states and 52548 transitions. [2021-05-03 13:51:03,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 52548 transitions. [2021-05-03 13:51:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:03,701 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:03,701 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:03,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:03,902 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:03,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:03,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1362399864, now seen corresponding path program 72 times [2021-05-03 13:51:03,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:03,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479580105] [2021-05-03 13:51:03,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:04,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479580105] [2021-05-03 13:51:04,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045550847] [2021-05-03 13:51:04,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:04,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:04,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:04,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069885562] [2021-05-03 13:51:04,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:04,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:04,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:04,348 INFO L87 Difference]: Start difference. First operand 22217 states and 52548 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:05,029 INFO L93 Difference]: Finished difference Result 22805 states and 53843 transitions. [2021-05-03 13:51:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:51:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:05,054 INFO L225 Difference]: With dead ends: 22805 [2021-05-03 13:51:05,054 INFO L226 Difference]: Without dead ends: 22788 [2021-05-03 13:51:05,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:51:05,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22788 states. [2021-05-03 13:51:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22788 to 22542. [2021-05-03 13:51:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22542 states, 22541 states have (on average 2.3664433698593674) internal successors, (53342), 22541 states have internal predecessors, (53342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22542 states to 22542 states and 53342 transitions. [2021-05-03 13:51:05,321 INFO L78 Accepts]: Start accepts. Automaton has 22542 states and 53342 transitions. Word has length 38 [2021-05-03 13:51:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:05,321 INFO L480 AbstractCegarLoop]: Abstraction has 22542 states and 53342 transitions. [2021-05-03 13:51:05,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 22542 states and 53342 transitions. [2021-05-03 13:51:05,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:05,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:05,336 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:05,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,536 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:05,536 INFO L82 PathProgramCache]: Analyzing trace with hash 668678558, now seen corresponding path program 73 times [2021-05-03 13:51:05,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:05,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117707461] [2021-05-03 13:51:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:05,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:05,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117707461] [2021-05-03 13:51:05,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827061987] [2021-05-03 13:51:05,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:05,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:05,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:05,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:05,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:05,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045647752] [2021-05-03 13:51:05,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:05,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:05,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:05,940 INFO L87 Difference]: Start difference. First operand 22542 states and 53342 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:06,594 INFO L93 Difference]: Finished difference Result 23126 states and 54628 transitions. [2021-05-03 13:51:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:51:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:06,620 INFO L225 Difference]: With dead ends: 23126 [2021-05-03 13:51:06,620 INFO L226 Difference]: Without dead ends: 23109 [2021-05-03 13:51:06,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 513.2ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:51:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23109 states. [2021-05-03 13:51:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23109 to 22863. [2021-05-03 13:51:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22863 states, 22862 states have (on average 2.367553144956697) internal successors, (54127), 22862 states have internal predecessors, (54127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22863 states to 22863 states and 54127 transitions. [2021-05-03 13:51:06,891 INFO L78 Accepts]: Start accepts. Automaton has 22863 states and 54127 transitions. Word has length 38 [2021-05-03 13:51:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:06,891 INFO L480 AbstractCegarLoop]: Abstraction has 22863 states and 54127 transitions. [2021-05-03 13:51:06,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 22863 states and 54127 transitions. [2021-05-03 13:51:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:06,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:06,906 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:07,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,106 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:07,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:07,107 INFO L82 PathProgramCache]: Analyzing trace with hash 109998596, now seen corresponding path program 74 times [2021-05-03 13:51:07,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:07,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844305289] [2021-05-03 13:51:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:07,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844305289] [2021-05-03 13:51:07,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209640457] [2021-05-03 13:51:07,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:07,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:07,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:07,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:07,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:07,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461269747] [2021-05-03 13:51:07,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:07,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:07,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:07,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:07,660 INFO L87 Difference]: Start difference. First operand 22863 states and 54127 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:08,402 INFO L93 Difference]: Finished difference Result 24322 states and 57349 transitions. [2021-05-03 13:51:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:51:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:08,431 INFO L225 Difference]: With dead ends: 24322 [2021-05-03 13:51:08,431 INFO L226 Difference]: Without dead ends: 24288 [2021-05-03 13:51:08,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:08,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2021-05-03 13:51:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23374. [2021-05-03 13:51:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23374 states, 23373 states have (on average 2.3687588242844306) internal successors, (55365), 23373 states have internal predecessors, (55365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23374 states to 23374 states and 55365 transitions. [2021-05-03 13:51:08,714 INFO L78 Accepts]: Start accepts. Automaton has 23374 states and 55365 transitions. Word has length 38 [2021-05-03 13:51:08,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:08,714 INFO L480 AbstractCegarLoop]: Abstraction has 23374 states and 55365 transitions. [2021-05-03 13:51:08,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 23374 states and 55365 transitions. [2021-05-03 13:51:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:08,728 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:08,728 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:08,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:08,929 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:08,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1753534780, now seen corresponding path program 75 times [2021-05-03 13:51:08,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:08,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971512416] [2021-05-03 13:51:08,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:09,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971512416] [2021-05-03 13:51:09,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136322448] [2021-05-03 13:51:09,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:09,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:51:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:09,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:09,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:51:09,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264732973] [2021-05-03 13:51:09,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:51:09,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:09,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:51:09,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:51:09,381 INFO L87 Difference]: Start difference. First operand 23374 states and 55365 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:10,460 INFO L93 Difference]: Finished difference Result 27871 states and 65364 transitions. [2021-05-03 13:51:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:51:10,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:10,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:10,492 INFO L225 Difference]: With dead ends: 27871 [2021-05-03 13:51:10,493 INFO L226 Difference]: Without dead ends: 27837 [2021-05-03 13:51:10,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 653.0ms TimeCoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:51:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27837 states. [2021-05-03 13:51:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27837 to 25120. [2021-05-03 13:51:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25120 states, 25119 states have (on average 2.3722281937975236) internal successors, (59588), 25119 states have internal predecessors, (59588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25120 states to 25120 states and 59588 transitions. [2021-05-03 13:51:10,870 INFO L78 Accepts]: Start accepts. Automaton has 25120 states and 59588 transitions. Word has length 38 [2021-05-03 13:51:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:10,870 INFO L480 AbstractCegarLoop]: Abstraction has 25120 states and 59588 transitions. [2021-05-03 13:51:10,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 25120 states and 59588 transitions. [2021-05-03 13:51:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:10,885 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:10,885 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:11,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,087 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:11,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:11,087 INFO L82 PathProgramCache]: Analyzing trace with hash 753620228, now seen corresponding path program 76 times [2021-05-03 13:51:11,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:11,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839444597] [2021-05-03 13:51:11,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:11,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839444597] [2021-05-03 13:51:11,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886947760] [2021-05-03 13:51:11,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:11,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:11,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:11,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:11,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:51:11,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:11,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:51:11,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283582676] [2021-05-03 13:51:11,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:51:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:51:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:51:11,527 INFO L87 Difference]: Start difference. First operand 25120 states and 59588 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:12,500 INFO L93 Difference]: Finished difference Result 28307 states and 66840 transitions. [2021-05-03 13:51:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:51:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:12,531 INFO L225 Difference]: With dead ends: 28307 [2021-05-03 13:51:12,531 INFO L226 Difference]: Without dead ends: 28255 [2021-05-03 13:51:12,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 675.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:51:12,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28255 states. [2021-05-03 13:51:12,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28255 to 26230. [2021-05-03 13:51:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26230 states, 26229 states have (on average 2.3725265927027337) internal successors, (62229), 26229 states have internal predecessors, (62229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26230 states to 26230 states and 62229 transitions. [2021-05-03 13:51:12,883 INFO L78 Accepts]: Start accepts. Automaton has 26230 states and 62229 transitions. Word has length 38 [2021-05-03 13:51:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:12,883 INFO L480 AbstractCegarLoop]: Abstraction has 26230 states and 62229 transitions. [2021-05-03 13:51:12,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 26230 states and 62229 transitions. [2021-05-03 13:51:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:12,899 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:12,899 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:13,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,099 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1813703360, now seen corresponding path program 77 times [2021-05-03 13:51:13,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:13,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609791432] [2021-05-03 13:51:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609791432] [2021-05-03 13:51:13,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205138926] [2021-05-03 13:51:13,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:13,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:51:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:13,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:13,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291783372] [2021-05-03 13:51:13,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:13,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:13,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:13,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:13,593 INFO L87 Difference]: Start difference. First operand 26230 states and 62229 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:14,262 INFO L93 Difference]: Finished difference Result 27788 states and 65761 transitions. [2021-05-03 13:51:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:51:14,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:14,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:14,296 INFO L225 Difference]: With dead ends: 27788 [2021-05-03 13:51:14,296 INFO L226 Difference]: Without dead ends: 27745 [2021-05-03 13:51:14,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:51:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27745 states. [2021-05-03 13:51:14,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27745 to 27377. [2021-05-03 13:51:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27377 states, 27376 states have (on average 2.3733927527761542) internal successors, (64974), 27376 states have internal predecessors, (64974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27377 states to 27377 states and 64974 transitions. [2021-05-03 13:51:14,672 INFO L78 Accepts]: Start accepts. Automaton has 27377 states and 64974 transitions. Word has length 38 [2021-05-03 13:51:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:14,673 INFO L480 AbstractCegarLoop]: Abstraction has 27377 states and 64974 transitions. [2021-05-03 13:51:14,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 27377 states and 64974 transitions. [2021-05-03 13:51:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:14,689 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:14,689 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:14,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-03 13:51:14,889 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1781515460, now seen corresponding path program 78 times [2021-05-03 13:51:14,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:14,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226167762] [2021-05-03 13:51:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:15,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226167762] [2021-05-03 13:51:15,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981815183] [2021-05-03 13:51:15,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:15,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:51:15,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:15,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:15,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:15,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 13:51:15,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978888551] [2021-05-03 13:51:15,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 13:51:15,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 13:51:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:51:15,372 INFO L87 Difference]: Start difference. First operand 27377 states and 64974 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:16,721 INFO L93 Difference]: Finished difference Result 36328 states and 85544 transitions. [2021-05-03 13:51:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:51:16,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:16,765 INFO L225 Difference]: With dead ends: 36328 [2021-05-03 13:51:16,765 INFO L226 Difference]: Without dead ends: 36251 [2021-05-03 13:51:16,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 915.4ms TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 13:51:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36251 states. [2021-05-03 13:51:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36251 to 31462. [2021-05-03 13:51:17,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31462 states, 31461 states have (on average 2.380757127872604) internal successors, (74901), 31461 states have internal predecessors, (74901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31462 states to 31462 states and 74901 transitions. [2021-05-03 13:51:17,268 INFO L78 Accepts]: Start accepts. Automaton has 31462 states and 74901 transitions. Word has length 38 [2021-05-03 13:51:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:17,268 INFO L480 AbstractCegarLoop]: Abstraction has 31462 states and 74901 transitions. [2021-05-03 13:51:17,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31462 states and 74901 transitions. [2021-05-03 13:51:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:17,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:17,285 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:17,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:17,486 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:17,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash -935549486, now seen corresponding path program 79 times [2021-05-03 13:51:17,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:17,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714894683] [2021-05-03 13:51:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:17,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714894683] [2021-05-03 13:51:17,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705182142] [2021-05-03 13:51:17,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:17,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:17,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:17,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:17,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:51:17,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282550963] [2021-05-03 13:51:17,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:51:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:17,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:51:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:17,913 INFO L87 Difference]: Start difference. First operand 31462 states and 74901 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:18,680 INFO L93 Difference]: Finished difference Result 33748 states and 79992 transitions. [2021-05-03 13:51:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:51:18,680 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:18,723 INFO L225 Difference]: With dead ends: 33748 [2021-05-03 13:51:18,723 INFO L226 Difference]: Without dead ends: 33715 [2021-05-03 13:51:18,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 506.2ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:51:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33715 states. [2021-05-03 13:51:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33715 to 32708. [2021-05-03 13:51:19,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32708 states, 32707 states have (on average 2.38224233344544) internal successors, (77916), 32707 states have internal predecessors, (77916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32708 states to 32708 states and 77916 transitions. [2021-05-03 13:51:19,144 INFO L78 Accepts]: Start accepts. Automaton has 32708 states and 77916 transitions. Word has length 38 [2021-05-03 13:51:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:19,144 INFO L480 AbstractCegarLoop]: Abstraction has 32708 states and 77916 transitions. [2021-05-03 13:51:19,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 32708 states and 77916 transitions. [2021-05-03 13:51:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:19,160 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:19,160 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:19,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-03 13:51:19,360 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:19,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:19,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1172986756, now seen corresponding path program 80 times [2021-05-03 13:51:19,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:19,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768591537] [2021-05-03 13:51:19,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:19,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768591537] [2021-05-03 13:51:19,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551167296] [2021-05-03 13:51:19,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:19,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:19,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:19,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:19,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:51:19,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:19,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-05-03 13:51:19,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248268040] [2021-05-03 13:51:19,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:51:19,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:51:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:19,792 INFO L87 Difference]: Start difference. First operand 32708 states and 77916 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:20,377 INFO L93 Difference]: Finished difference Result 35110 states and 83307 transitions. [2021-05-03 13:51:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:51:20,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:20,421 INFO L225 Difference]: With dead ends: 35110 [2021-05-03 13:51:20,421 INFO L226 Difference]: Without dead ends: 35069 [2021-05-03 13:51:20,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 490.2ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:51:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35069 states. [2021-05-03 13:51:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35069 to 34187. [2021-05-03 13:51:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34187 states, 34186 states have (on average 2.3835780728953373) internal successors, (81485), 34186 states have internal predecessors, (81485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34187 states to 34187 states and 81485 transitions. [2021-05-03 13:51:20,905 INFO L78 Accepts]: Start accepts. Automaton has 34187 states and 81485 transitions. Word has length 38 [2021-05-03 13:51:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:20,905 INFO L480 AbstractCegarLoop]: Abstraction has 34187 states and 81485 transitions. [2021-05-03 13:51:20,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 34187 states and 81485 transitions. [2021-05-03 13:51:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:20,922 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:20,922 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:21,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-03 13:51:21,123 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2139718750, now seen corresponding path program 81 times [2021-05-03 13:51:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:21,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635438666] [2021-05-03 13:51:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:21,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635438666] [2021-05-03 13:51:21,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554838517] [2021-05-03 13:51:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:21,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:21,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:21,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:21,619 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:21,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:21,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 13:51:21,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64516788] [2021-05-03 13:51:21,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 13:51:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:21,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 13:51:21,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:51:21,620 INFO L87 Difference]: Start difference. First operand 34187 states and 81485 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:23,097 INFO L93 Difference]: Finished difference Result 40688 states and 96358 transitions. [2021-05-03 13:51:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 13:51:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:23,148 INFO L225 Difference]: With dead ends: 40688 [2021-05-03 13:51:23,149 INFO L226 Difference]: Without dead ends: 40654 [2021-05-03 13:51:23,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 876.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 13:51:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40654 states. [2021-05-03 13:51:23,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40654 to 37776. [2021-05-03 13:51:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37776 states, 37775 states have (on average 2.3929053606882857) internal successors, (90392), 37775 states have internal predecessors, (90392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37776 states to 37776 states and 90392 transitions. [2021-05-03 13:51:23,738 INFO L78 Accepts]: Start accepts. Automaton has 37776 states and 90392 transitions. Word has length 38 [2021-05-03 13:51:23,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:23,738 INFO L480 AbstractCegarLoop]: Abstraction has 37776 states and 90392 transitions. [2021-05-03 13:51:23,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 26 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 37776 states and 90392 transitions. [2021-05-03 13:51:23,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:23,758 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:23,758 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:23,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:23,972 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:23,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:23,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1191604386, now seen corresponding path program 82 times [2021-05-03 13:51:23,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:23,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169120297] [2021-05-03 13:51:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:24,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169120297] [2021-05-03 13:51:24,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160569926] [2021-05-03 13:51:24,114 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:24,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:24,408 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:51:24,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:24,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:51:24,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763523856] [2021-05-03 13:51:24,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:51:24,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:51:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:51:24,409 INFO L87 Difference]: Start difference. First operand 37776 states and 90392 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:25,220 INFO L93 Difference]: Finished difference Result 40320 states and 96087 transitions. [2021-05-03 13:51:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:51:25,221 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:25,270 INFO L225 Difference]: With dead ends: 40320 [2021-05-03 13:51:25,270 INFO L226 Difference]: Without dead ends: 40277 [2021-05-03 13:51:25,271 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 626.9ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:51:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40277 states. [2021-05-03 13:51:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40277 to 37806. [2021-05-03 13:51:25,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37806 states, 37805 states have (on average 2.3926464753339505) internal successors, (90454), 37805 states have internal predecessors, (90454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37806 states to 37806 states and 90454 transitions. [2021-05-03 13:51:25,767 INFO L78 Accepts]: Start accepts. Automaton has 37806 states and 90454 transitions. Word has length 38 [2021-05-03 13:51:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:25,767 INFO L480 AbstractCegarLoop]: Abstraction has 37806 states and 90454 transitions. [2021-05-03 13:51:25,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 37806 states and 90454 transitions. [2021-05-03 13:51:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:25,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:25,785 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:25,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:25,985 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:25,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2023964272, now seen corresponding path program 83 times [2021-05-03 13:51:25,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:25,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669909285] [2021-05-03 13:51:25,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:26,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669909285] [2021-05-03 13:51:26,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581433968] [2021-05-03 13:51:26,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:26,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:51:26,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:26,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:26,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:26,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:26,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:51:26,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697683402] [2021-05-03 13:51:26,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:51:26,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:26,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:51:26,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:26,417 INFO L87 Difference]: Start difference. First operand 37806 states and 90454 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:27,244 INFO L93 Difference]: Finished difference Result 39152 states and 93430 transitions. [2021-05-03 13:51:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:27,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:27,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:27,298 INFO L225 Difference]: With dead ends: 39152 [2021-05-03 13:51:27,298 INFO L226 Difference]: Without dead ends: 39118 [2021-05-03 13:51:27,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39118 states. [2021-05-03 13:51:27,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39118 to 38927. [2021-05-03 13:51:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38927 states, 38926 states have (on average 2.3894055387144837) internal successors, (93010), 38926 states have internal predecessors, (93010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38927 states to 38927 states and 93010 transitions. [2021-05-03 13:51:27,874 INFO L78 Accepts]: Start accepts. Automaton has 38927 states and 93010 transitions. Word has length 38 [2021-05-03 13:51:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:27,874 INFO L480 AbstractCegarLoop]: Abstraction has 38927 states and 93010 transitions. [2021-05-03 13:51:27,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:27,874 INFO L276 IsEmpty]: Start isEmpty. Operand 38927 states and 93010 transitions. [2021-05-03 13:51:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:27,894 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:27,894 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:28,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:28,095 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1797244792, now seen corresponding path program 84 times [2021-05-03 13:51:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:28,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028780905] [2021-05-03 13:51:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:28,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028780905] [2021-05-03 13:51:28,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544180742] [2021-05-03 13:51:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:28,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:28,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:28,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:28,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:28,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727066677] [2021-05-03 13:51:28,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:28,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:28,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:28,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:28,500 INFO L87 Difference]: Start difference. First operand 38927 states and 93010 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:29,206 INFO L93 Difference]: Finished difference Result 39710 states and 94740 transitions. [2021-05-03 13:51:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:29,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:29,257 INFO L225 Difference]: With dead ends: 39710 [2021-05-03 13:51:29,257 INFO L226 Difference]: Without dead ends: 39676 [2021-05-03 13:51:29,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:51:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39676 states. [2021-05-03 13:51:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39676 to 39279. [2021-05-03 13:51:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39279 states, 39278 states have (on average 2.390091145170324) internal successors, (93878), 39278 states have internal predecessors, (93878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39279 states to 39279 states and 93878 transitions. [2021-05-03 13:51:29,751 INFO L78 Accepts]: Start accepts. Automaton has 39279 states and 93878 transitions. Word has length 38 [2021-05-03 13:51:29,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:29,751 INFO L480 AbstractCegarLoop]: Abstraction has 39279 states and 93878 transitions. [2021-05-03 13:51:29,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:29,751 INFO L276 IsEmpty]: Start isEmpty. Operand 39279 states and 93878 transitions. [2021-05-03 13:51:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:29,769 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:29,769 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:29,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-03 13:51:29,970 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash -153708608, now seen corresponding path program 85 times [2021-05-03 13:51:29,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:29,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21415458] [2021-05-03 13:51:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:30,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21415458] [2021-05-03 13:51:30,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950114534] [2021-05-03 13:51:30,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:51:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:30,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:30,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:30,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:30,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:51:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647469125] [2021-05-03 13:51:30,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:51:30,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:51:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:30,431 INFO L87 Difference]: Start difference. First operand 39279 states and 93878 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:31,250 INFO L93 Difference]: Finished difference Result 41067 states and 97771 transitions. [2021-05-03 13:51:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:31,251 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:31,301 INFO L225 Difference]: With dead ends: 41067 [2021-05-03 13:51:31,301 INFO L226 Difference]: Without dead ends: 41033 [2021-05-03 13:51:31,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 706.5ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:51:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41033 states. [2021-05-03 13:51:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41033 to 39745. [2021-05-03 13:51:31,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39745 states, 39744 states have (on average 2.3893669484702094) internal successors, (94963), 39744 states have internal predecessors, (94963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39745 states to 39745 states and 94963 transitions. [2021-05-03 13:51:31,790 INFO L78 Accepts]: Start accepts. Automaton has 39745 states and 94963 transitions. Word has length 38 [2021-05-03 13:51:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:31,790 INFO L480 AbstractCegarLoop]: Abstraction has 39745 states and 94963 transitions. [2021-05-03 13:51:31,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 39745 states and 94963 transitions. [2021-05-03 13:51:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:31,808 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:31,808 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:32,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:32,009 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash -833600632, now seen corresponding path program 86 times [2021-05-03 13:51:32,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:32,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462589363] [2021-05-03 13:51:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462589363] [2021-05-03 13:51:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122812805] [2021-05-03 13:51:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:32,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:32,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:32,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:51:32,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:32,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:51:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229122846] [2021-05-03 13:51:32,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:51:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:51:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:51:32,438 INFO L87 Difference]: Start difference. First operand 39745 states and 94963 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:33,278 INFO L93 Difference]: Finished difference Result 42419 states and 100916 transitions. [2021-05-03 13:51:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:51:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:33,334 INFO L225 Difference]: With dead ends: 42419 [2021-05-03 13:51:33,334 INFO L226 Difference]: Without dead ends: 42376 [2021-05-03 13:51:33,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:33,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42376 states. [2021-05-03 13:51:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42376 to 39971. [2021-05-03 13:51:33,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39971 states, 39970 states have (on average 2.3887415561671252) internal successors, (95478), 39970 states have internal predecessors, (95478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39971 states to 39971 states and 95478 transitions. [2021-05-03 13:51:33,857 INFO L78 Accepts]: Start accepts. Automaton has 39971 states and 95478 transitions. Word has length 38 [2021-05-03 13:51:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:33,858 INFO L480 AbstractCegarLoop]: Abstraction has 39971 states and 95478 transitions. [2021-05-03 13:51:33,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 39971 states and 95478 transitions. [2021-05-03 13:51:33,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:33,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:33,876 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:34,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-03 13:51:34,077 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash 983400630, now seen corresponding path program 87 times [2021-05-03 13:51:34,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:34,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769663463] [2021-05-03 13:51:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769663463] [2021-05-03 13:51:34,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982104171] [2021-05-03 13:51:34,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:34,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:34,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:34,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:34,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:34,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:34,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:34,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386051323] [2021-05-03 13:51:34,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:34,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:34,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:34,661 INFO L87 Difference]: Start difference. First operand 39971 states and 95478 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:35,329 INFO L93 Difference]: Finished difference Result 40507 states and 96663 transitions. [2021-05-03 13:51:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:51:35,330 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:35,383 INFO L225 Difference]: With dead ends: 40507 [2021-05-03 13:51:35,383 INFO L226 Difference]: Without dead ends: 40490 [2021-05-03 13:51:35,383 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 531.8ms TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:51:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40490 states. [2021-05-03 13:51:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40490 to 40295. [2021-05-03 13:51:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40295 states, 40294 states have (on average 2.389189457487467) internal successors, (96270), 40294 states have internal predecessors, (96270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:35,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40295 states to 40295 states and 96270 transitions. [2021-05-03 13:51:35,881 INFO L78 Accepts]: Start accepts. Automaton has 40295 states and 96270 transitions. Word has length 38 [2021-05-03 13:51:35,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:35,881 INFO L480 AbstractCegarLoop]: Abstraction has 40295 states and 96270 transitions. [2021-05-03 13:51:35,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 40295 states and 96270 transitions. [2021-05-03 13:51:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:35,902 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:35,902 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:36,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:36,102 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1143426556, now seen corresponding path program 88 times [2021-05-03 13:51:36,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:36,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293940454] [2021-05-03 13:51:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:36,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293940454] [2021-05-03 13:51:36,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708124809] [2021-05-03 13:51:36,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:36,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:36,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:36,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:36,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:36,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:36,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372696979] [2021-05-03 13:51:36,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:36,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:36,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:36,519 INFO L87 Difference]: Start difference. First operand 40295 states and 96270 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:37,218 INFO L93 Difference]: Finished difference Result 40827 states and 97446 transitions. [2021-05-03 13:51:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:51:37,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:37,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:37,272 INFO L225 Difference]: With dead ends: 40827 [2021-05-03 13:51:37,272 INFO L226 Difference]: Without dead ends: 40810 [2021-05-03 13:51:37,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 526.0ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:51:37,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40810 states. [2021-05-03 13:51:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40810 to 40615. [2021-05-03 13:51:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40615 states, 40614 states have (on average 2.389643965135175) internal successors, (97053), 40614 states have internal predecessors, (97053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 97053 transitions. [2021-05-03 13:51:37,924 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 97053 transitions. Word has length 38 [2021-05-03 13:51:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:37,925 INFO L480 AbstractCegarLoop]: Abstraction has 40615 states and 97053 transitions. [2021-05-03 13:51:37,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 97053 transitions. [2021-05-03 13:51:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:37,944 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:37,944 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:38,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:38,144 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:38,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1660475200, now seen corresponding path program 89 times [2021-05-03 13:51:38,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:38,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977711970] [2021-05-03 13:51:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:38,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977711970] [2021-05-03 13:51:38,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108881455] [2021-05-03 13:51:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:38,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:51:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:38,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:38,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:38,618 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:38,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:38,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 13:51:38,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505103101] [2021-05-03 13:51:38,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 13:51:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 13:51:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:51:38,619 INFO L87 Difference]: Start difference. First operand 40615 states and 97053 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:39,551 INFO L93 Difference]: Finished difference Result 41685 states and 99369 transitions. [2021-05-03 13:51:39,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:51:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:39,606 INFO L225 Difference]: With dead ends: 41685 [2021-05-03 13:51:39,606 INFO L226 Difference]: Without dead ends: 41668 [2021-05-03 13:51:39,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 698.6ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:51:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41668 states. [2021-05-03 13:51:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41668 to 40952. [2021-05-03 13:51:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40952 states, 40951 states have (on average 2.390124783277576) internal successors, (97878), 40951 states have internal predecessors, (97878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40952 states to 40952 states and 97878 transitions. [2021-05-03 13:51:40,117 INFO L78 Accepts]: Start accepts. Automaton has 40952 states and 97878 transitions. Word has length 38 [2021-05-03 13:51:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:40,118 INFO L480 AbstractCegarLoop]: Abstraction has 40952 states and 97878 transitions. [2021-05-03 13:51:40,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 40952 states and 97878 transitions. [2021-05-03 13:51:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:40,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:40,136 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:40,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 13:51:40,336 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash 222587144, now seen corresponding path program 90 times [2021-05-03 13:51:40,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:40,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785055139] [2021-05-03 13:51:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785055139] [2021-05-03 13:51:40,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890800788] [2021-05-03 13:51:40,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:40,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 13:51:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:40,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:40,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:40,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:40,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164526180] [2021-05-03 13:51:40,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:40,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:40,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:40,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:40,754 INFO L87 Difference]: Start difference. First operand 40952 states and 97878 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:41,600 INFO L93 Difference]: Finished difference Result 41871 states and 99905 transitions. [2021-05-03 13:51:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:41,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:41,654 INFO L225 Difference]: With dead ends: 41871 [2021-05-03 13:51:41,655 INFO L226 Difference]: Without dead ends: 41837 [2021-05-03 13:51:41,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:51:41,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41837 states. [2021-05-03 13:51:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41837 to 41439. [2021-05-03 13:51:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41439 states, 41438 states have (on average 2.3901974033495823) internal successors, (99045), 41438 states have internal predecessors, (99045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:42,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41439 states to 41439 states and 99045 transitions. [2021-05-03 13:51:42,354 INFO L78 Accepts]: Start accepts. Automaton has 41439 states and 99045 transitions. Word has length 38 [2021-05-03 13:51:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:42,354 INFO L480 AbstractCegarLoop]: Abstraction has 41439 states and 99045 transitions. [2021-05-03 13:51:42,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 41439 states and 99045 transitions. [2021-05-03 13:51:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:42,374 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:42,374 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:42,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 13:51:42,574 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:42,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1866123328, now seen corresponding path program 91 times [2021-05-03 13:51:42,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:42,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538569239] [2021-05-03 13:51:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:42,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:42,725 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:42,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538569239] [2021-05-03 13:51:42,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791892671] [2021-05-03 13:51:42,725 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:43,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:43,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 13:51:43,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354969582] [2021-05-03 13:51:43,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:51:43,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:51:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:51:43,030 INFO L87 Difference]: Start difference. First operand 41439 states and 99045 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:43,865 INFO L93 Difference]: Finished difference Result 43352 states and 103181 transitions. [2021-05-03 13:51:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:51:43,866 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:43,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:43,922 INFO L225 Difference]: With dead ends: 43352 [2021-05-03 13:51:43,922 INFO L226 Difference]: Without dead ends: 43318 [2021-05-03 13:51:43,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:51:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43318 states. [2021-05-03 13:51:44,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43318 to 42025. [2021-05-03 13:51:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42025 states, 42024 states have (on average 2.389539310869979) internal successors, (100418), 42024 states have internal predecessors, (100418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42025 states to 42025 states and 100418 transitions. [2021-05-03 13:51:44,453 INFO L78 Accepts]: Start accepts. Automaton has 42025 states and 100418 transitions. Word has length 38 [2021-05-03 13:51:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:44,453 INFO L480 AbstractCegarLoop]: Abstraction has 42025 states and 100418 transitions. [2021-05-03 13:51:44,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:44,453 INFO L276 IsEmpty]: Start isEmpty. Operand 42025 states and 100418 transitions. [2021-05-03 13:51:44,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:44,473 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:44,473 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:44,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:44,674 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231304, now seen corresponding path program 92 times [2021-05-03 13:51:44,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:44,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072956249] [2021-05-03 13:51:44,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:44,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072956249] [2021-05-03 13:51:44,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919951350] [2021-05-03 13:51:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:44,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:51:45,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:45,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-05-03 13:51:45,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818108543] [2021-05-03 13:51:45,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 13:51:45,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:45,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 13:51:45,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-03 13:51:45,135 INFO L87 Difference]: Start difference. First operand 42025 states and 100418 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:45,812 INFO L93 Difference]: Finished difference Result 44617 states and 106177 transitions. [2021-05-03 13:51:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:51:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:45,874 INFO L225 Difference]: With dead ends: 44617 [2021-05-03 13:51:45,874 INFO L226 Difference]: Without dead ends: 44574 [2021-05-03 13:51:45,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 556.0ms TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:51:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44574 states. [2021-05-03 13:51:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44574 to 43210. [2021-05-03 13:51:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43210 states, 43209 states have (on average 2.3895021870443656) internal successors, (103248), 43209 states have internal predecessors, (103248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43210 states to 43210 states and 103248 transitions. [2021-05-03 13:51:46,531 INFO L78 Accepts]: Start accepts. Automaton has 43210 states and 103248 transitions. Word has length 38 [2021-05-03 13:51:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:46,531 INFO L480 AbstractCegarLoop]: Abstraction has 43210 states and 103248 transitions. [2021-05-03 13:51:46,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 43210 states and 103248 transitions. [2021-05-03 13:51:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:46,552 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:46,552 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:46,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 13:51:46,752 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1481114862, now seen corresponding path program 93 times [2021-05-03 13:51:46,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:46,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549739798] [2021-05-03 13:51:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:46,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549739798] [2021-05-03 13:51:46,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847189088] [2021-05-03 13:51:46,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:46,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:47,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:47,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:47,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178858646] [2021-05-03 13:51:47,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:47,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:47,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:47,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:47,164 INFO L87 Difference]: Start difference. First operand 43210 states and 103248 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:47,782 INFO L93 Difference]: Finished difference Result 43750 states and 104441 transitions. [2021-05-03 13:51:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:51:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:47,835 INFO L225 Difference]: With dead ends: 43750 [2021-05-03 13:51:47,836 INFO L226 Difference]: Without dead ends: 43733 [2021-05-03 13:51:47,836 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 508.4ms TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:51:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43733 states. [2021-05-03 13:51:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43733 to 43536. [2021-05-03 13:51:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43536 states, 43535 states have (on average 2.389893189387849) internal successors, (104044), 43535 states have internal predecessors, (104044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43536 states to 43536 states and 104044 transitions. [2021-05-03 13:51:48,380 INFO L78 Accepts]: Start accepts. Automaton has 43536 states and 104044 transitions. Word has length 38 [2021-05-03 13:51:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:48,381 INFO L480 AbstractCegarLoop]: Abstraction has 43536 states and 104044 transitions. [2021-05-03 13:51:48,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 43536 states and 104044 transitions. [2021-05-03 13:51:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 13:51:48,568 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:48,568 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:48,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 13:51:48,781 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1460963246, now seen corresponding path program 94 times [2021-05-03 13:51:48,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:48,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122619812] [2021-05-03 13:51:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:51:49,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122619812] [2021-05-03 13:51:49,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41740251] [2021-05-03 13:51:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:49,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:49,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 13:51:49,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:51:49,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:49,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 13:51:49,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596867608] [2021-05-03 13:51:49,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:51:49,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:49,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:51:49,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:51:49,343 INFO L87 Difference]: Start difference. First operand 43536 states and 104044 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:49,982 INFO L93 Difference]: Finished difference Result 44087 states and 105256 transitions. [2021-05-03 13:51:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:51:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 13:51:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:50,046 INFO L225 Difference]: With dead ends: 44087 [2021-05-03 13:51:50,046 INFO L226 Difference]: Without dead ends: 44070 [2021-05-03 13:51:50,046 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 504.2ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:51:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44070 states. [2021-05-03 13:51:50,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44070 to 43846. [2021-05-03 13:51:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43846 states, 43845 states have (on average 2.3903523776941498) internal successors, (104805), 43845 states have internal predecessors, (104805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43846 states to 43846 states and 104805 transitions. [2021-05-03 13:51:50,656 INFO L78 Accepts]: Start accepts. Automaton has 43846 states and 104805 transitions. Word has length 38 [2021-05-03 13:51:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:50,656 INFO L480 AbstractCegarLoop]: Abstraction has 43846 states and 104805 transitions. [2021-05-03 13:51:50,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:50,656 INFO L276 IsEmpty]: Start isEmpty. Operand 43846 states and 104805 transitions. [2021-05-03 13:51:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:51:50,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:50,674 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:50,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 13:51:50,876 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash -488174358, now seen corresponding path program 95 times [2021-05-03 13:51:50,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:50,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489661285] [2021-05-03 13:51:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:51:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489661285] [2021-05-03 13:51:50,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295410838] [2021-05-03 13:51:50,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:50,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:51:50,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:50,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:51:50,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:51:51,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:51,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 13:51:51,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310204770] [2021-05-03 13:51:51,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:51:51,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:51,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:51:51,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:51:51,017 INFO L87 Difference]: Start difference. First operand 43846 states and 104805 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:51,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:51,244 INFO L93 Difference]: Finished difference Result 54955 states and 131607 transitions. [2021-05-03 13:51:51,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:51:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:51:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:51,328 INFO L225 Difference]: With dead ends: 54955 [2021-05-03 13:51:51,328 INFO L226 Difference]: Without dead ends: 54921 [2021-05-03 13:51:51,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:51:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54921 states. [2021-05-03 13:51:52,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54921 to 54598. [2021-05-03 13:51:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54598 states, 54597 states have (on average 2.3952781288349176) internal successors, (130775), 54597 states have internal predecessors, (130775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54598 states to 54598 states and 130775 transitions. [2021-05-03 13:51:52,241 INFO L78 Accepts]: Start accepts. Automaton has 54598 states and 130775 transitions. Word has length 39 [2021-05-03 13:51:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:52,241 INFO L480 AbstractCegarLoop]: Abstraction has 54598 states and 130775 transitions. [2021-05-03 13:51:52,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 54598 states and 130775 transitions. [2021-05-03 13:51:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:51:52,263 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:52,263 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:52,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:52,464 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:52,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:52,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1273067626, now seen corresponding path program 96 times [2021-05-03 13:51:52,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:52,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753361048] [2021-05-03 13:51:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:51:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753361048] [2021-05-03 13:51:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043897149] [2021-05-03 13:51:52,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:52,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:51:52,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:51:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:51:52,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:52,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:51:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945867680] [2021-05-03 13:51:52,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:51:52,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:51:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:51:52,562 INFO L87 Difference]: Start difference. First operand 54598 states and 130775 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:52,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:52,901 INFO L93 Difference]: Finished difference Result 54798 states and 130742 transitions. [2021-05-03 13:51:52,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:52,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:51:52,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:52,981 INFO L225 Difference]: With dead ends: 54798 [2021-05-03 13:51:52,981 INFO L226 Difference]: Without dead ends: 54798 [2021-05-03 13:51:52,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54798 states. [2021-05-03 13:51:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54798 to 49862. [2021-05-03 13:51:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49862 states, 49861 states have (on average 2.3922705120234253) internal successors, (119281), 49861 states have internal predecessors, (119281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49862 states to 49862 states and 119281 transitions. [2021-05-03 13:51:53,790 INFO L78 Accepts]: Start accepts. Automaton has 49862 states and 119281 transitions. Word has length 39 [2021-05-03 13:51:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:53,790 INFO L480 AbstractCegarLoop]: Abstraction has 49862 states and 119281 transitions. [2021-05-03 13:51:53,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 6 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 49862 states and 119281 transitions. [2021-05-03 13:51:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:51:53,810 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:53,810 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:54,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 13:51:54,010 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2021062548, now seen corresponding path program 97 times [2021-05-03 13:51:54,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:54,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589493564] [2021-05-03 13:51:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:51:54,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589493564] [2021-05-03 13:51:54,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977025697] [2021-05-03 13:51:54,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:54,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:51:54,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:54,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:51:54,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:54,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:51:54,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38961171] [2021-05-03 13:51:54,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:51:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:54,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:51:54,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:51:54,108 INFO L87 Difference]: Start difference. First operand 49862 states and 119281 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:54,310 INFO L93 Difference]: Finished difference Result 51794 states and 123670 transitions. [2021-05-03 13:51:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:51:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:51:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:54,382 INFO L225 Difference]: With dead ends: 51794 [2021-05-03 13:51:54,382 INFO L226 Difference]: Without dead ends: 51790 [2021-05-03 13:51:54,382 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:51:54,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51790 states. [2021-05-03 13:51:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51790 to 51361. [2021-05-03 13:51:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51361 states, 51360 states have (on average 2.3916082554517133) internal successors, (122833), 51360 states have internal predecessors, (122833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51361 states to 51361 states and 122833 transitions. [2021-05-03 13:51:55,300 INFO L78 Accepts]: Start accepts. Automaton has 51361 states and 122833 transitions. Word has length 39 [2021-05-03 13:51:55,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:55,300 INFO L480 AbstractCegarLoop]: Abstraction has 51361 states and 122833 transitions. [2021-05-03 13:51:55,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:55,300 INFO L276 IsEmpty]: Start isEmpty. Operand 51361 states and 122833 transitions. [2021-05-03 13:51:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:51:55,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:55,319 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:55,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 13:51:55,520 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1868537008, now seen corresponding path program 98 times [2021-05-03 13:51:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:55,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165566548] [2021-05-03 13:51:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:51:55,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165566548] [2021-05-03 13:51:55,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311571191] [2021-05-03 13:51:55,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 13:51:55,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:51:55,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:55,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:55,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 13:51:55,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:55,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:51:55,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94114333] [2021-05-03 13:51:55,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:51:55,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:55,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:51:55,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:51:55,642 INFO L87 Difference]: Start difference. First operand 51361 states and 122833 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:55,989 INFO L93 Difference]: Finished difference Result 53808 states and 127704 transitions. [2021-05-03 13:51:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:55,990 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:51:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:56,068 INFO L225 Difference]: With dead ends: 53808 [2021-05-03 13:51:56,068 INFO L226 Difference]: Without dead ends: 53805 [2021-05-03 13:51:56,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:51:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53805 states. [2021-05-03 13:51:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53805 to 52349. [2021-05-03 13:51:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52349 states, 52348 states have (on average 2.3850576908382366) internal successors, (124853), 52348 states have internal predecessors, (124853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52349 states to 52349 states and 124853 transitions. [2021-05-03 13:51:57,093 INFO L78 Accepts]: Start accepts. Automaton has 52349 states and 124853 transitions. Word has length 39 [2021-05-03 13:51:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:57,093 INFO L480 AbstractCegarLoop]: Abstraction has 52349 states and 124853 transitions. [2021-05-03 13:51:57,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 52349 states and 124853 transitions. [2021-05-03 13:51:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:51:57,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:57,112 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:57,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 13:51:57,313 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1961116246, now seen corresponding path program 99 times [2021-05-03 13:51:57,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:57,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817438244] [2021-05-03 13:51:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:51:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817438244] [2021-05-03 13:51:57,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514137509] [2021-05-03 13:51:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:57,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 13:51:57,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:57,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:51:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:51:57,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:57,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 13:51:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212401728] [2021-05-03 13:51:57,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:51:57,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:51:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:51:57,404 INFO L87 Difference]: Start difference. First operand 52349 states and 124853 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:57,611 INFO L93 Difference]: Finished difference Result 52855 states and 124721 transitions. [2021-05-03 13:51:57,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:57,611 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:51:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:57,685 INFO L225 Difference]: With dead ends: 52855 [2021-05-03 13:51:57,685 INFO L226 Difference]: Without dead ends: 52852 [2021-05-03 13:51:57,686 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:51:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52852 states. [2021-05-03 13:51:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52852 to 50549. [2021-05-03 13:51:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50549 states, 50548 states have (on average 2.3744163962965894) internal successors, (120022), 50548 states have internal predecessors, (120022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50549 states to 50549 states and 120022 transitions. [2021-05-03 13:51:58,586 INFO L78 Accepts]: Start accepts. Automaton has 50549 states and 120022 transitions. Word has length 39 [2021-05-03 13:51:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:51:58,586 INFO L480 AbstractCegarLoop]: Abstraction has 50549 states and 120022 transitions. [2021-05-03 13:51:58,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:58,586 INFO L276 IsEmpty]: Start isEmpty. Operand 50549 states and 120022 transitions. [2021-05-03 13:51:58,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:51:58,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:51:58,604 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:51:58,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:58,804 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:51:58,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:51:58,804 INFO L82 PathProgramCache]: Analyzing trace with hash -477075350, now seen corresponding path program 100 times [2021-05-03 13:51:58,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:51:58,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348842528] [2021-05-03 13:51:58,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:51:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:51:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:51:58,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348842528] [2021-05-03 13:51:58,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159478736] [2021-05-03 13:51:58,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:51:58,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:51:58,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:51:58,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:51:58,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:51:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:51:58,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:51:58,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 13:51:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673953056] [2021-05-03 13:51:58,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:51:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:51:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:51:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:51:58,903 INFO L87 Difference]: Start difference. First operand 50549 states and 120022 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:51:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:51:59,099 INFO L93 Difference]: Finished difference Result 50891 states and 120586 transitions. [2021-05-03 13:51:59,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:51:59,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:51:59,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:51:59,165 INFO L225 Difference]: With dead ends: 50891 [2021-05-03 13:51:59,165 INFO L226 Difference]: Without dead ends: 50871 [2021-05-03 13:51:59,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-05-03 13:51:59,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50871 states. [2021-05-03 13:51:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50871 to 50523. [2021-05-03 13:51:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50523 states, 50522 states have (on average 2.3704326827916553) internal successors, (119759), 50522 states have internal predecessors, (119759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:00,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 119759 transitions. [2021-05-03 13:52:00,050 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 119759 transitions. Word has length 39 [2021-05-03 13:52:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:00,050 INFO L480 AbstractCegarLoop]: Abstraction has 50523 states and 119759 transitions. [2021-05-03 13:52:00,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 119759 transitions. [2021-05-03 13:52:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:52:00,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:00,224 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:00,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:00,440 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:00,440 INFO L82 PathProgramCache]: Analyzing trace with hash 100006250, now seen corresponding path program 101 times [2021-05-03 13:52:00,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:00,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544395977] [2021-05-03 13:52:00,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544395977] [2021-05-03 13:52:00,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246002620] [2021-05-03 13:52:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:00,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:52:00,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:00,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:52:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:52:00,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:00,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:52:00,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623571717] [2021-05-03 13:52:00,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:52:00,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:52:00,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:52:00,530 INFO L87 Difference]: Start difference. First operand 50523 states and 119759 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:00,725 INFO L93 Difference]: Finished difference Result 51054 states and 120870 transitions. [2021-05-03 13:52:00,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 13:52:00,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:52:00,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:00,808 INFO L225 Difference]: With dead ends: 51054 [2021-05-03 13:52:00,808 INFO L226 Difference]: Without dead ends: 51050 [2021-05-03 13:52:00,808 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 13:52:00,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51050 states. [2021-05-03 13:52:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51050 to 50840. [2021-05-03 13:52:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50840 states, 50839 states have (on average 2.3698341824190092) internal successors, (120480), 50839 states have internal predecessors, (120480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50840 states to 50840 states and 120480 transitions. [2021-05-03 13:52:01,571 INFO L78 Accepts]: Start accepts. Automaton has 50840 states and 120480 transitions. Word has length 39 [2021-05-03 13:52:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:01,571 INFO L480 AbstractCegarLoop]: Abstraction has 50840 states and 120480 transitions. [2021-05-03 13:52:01,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 50840 states and 120480 transitions. [2021-05-03 13:52:01,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:52:01,591 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:01,591 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:01,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:01,792 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:01,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash -305361490, now seen corresponding path program 102 times [2021-05-03 13:52:01,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:01,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402144489] [2021-05-03 13:52:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:01,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402144489] [2021-05-03 13:52:01,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090106464] [2021-05-03 13:52:01,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:01,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:52:01,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:01,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:52:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:52:01,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:01,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 13:52:01,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137162518] [2021-05-03 13:52:01,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 13:52:01,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:01,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 13:52:01,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-03 13:52:01,887 INFO L87 Difference]: Start difference. First operand 50840 states and 120480 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:02,090 INFO L93 Difference]: Finished difference Result 52488 states and 123817 transitions. [2021-05-03 13:52:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:52:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:52:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:02,311 INFO L225 Difference]: With dead ends: 52488 [2021-05-03 13:52:02,312 INFO L226 Difference]: Without dead ends: 52485 [2021-05-03 13:52:02,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 13:52:02,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52485 states. [2021-05-03 13:52:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52485 to 51238. [2021-05-03 13:52:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51238 states, 51237 states have (on average 2.3674493042137517) internal successors, (121301), 51237 states have internal predecessors, (121301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:03,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51238 states to 51238 states and 121301 transitions. [2021-05-03 13:52:03,090 INFO L78 Accepts]: Start accepts. Automaton has 51238 states and 121301 transitions. Word has length 39 [2021-05-03 13:52:03,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:03,090 INFO L480 AbstractCegarLoop]: Abstraction has 51238 states and 121301 transitions. [2021-05-03 13:52:03,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:03,091 INFO L276 IsEmpty]: Start isEmpty. Operand 51238 states and 121301 transitions. [2021-05-03 13:52:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:52:03,113 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:03,113 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:03,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 13:52:03,314 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 159952552, now seen corresponding path program 103 times [2021-05-03 13:52:03,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:03,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515582464] [2021-05-03 13:52:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:52:03,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515582464] [2021-05-03 13:52:03,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170327064] [2021-05-03 13:52:03,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:52:03,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 13:52:03,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:03,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-05-03 13:52:03,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217456592] [2021-05-03 13:52:03,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 13:52:03,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:03,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 13:52:03,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-03 13:52:03,426 INFO L87 Difference]: Start difference. First operand 51238 states and 121301 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:03,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:03,692 INFO L93 Difference]: Finished difference Result 52380 states and 123468 transitions. [2021-05-03 13:52:03,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 13:52:03,693 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:52:03,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:03,774 INFO L225 Difference]: With dead ends: 52380 [2021-05-03 13:52:03,774 INFO L226 Difference]: Without dead ends: 52368 [2021-05-03 13:52:03,775 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 13:52:03,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52368 states. [2021-05-03 13:52:04,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52368 to 51650. [2021-05-03 13:52:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51650 states, 51649 states have (on average 2.361807585819667) internal successors, (121985), 51649 states have internal predecessors, (121985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51650 states to 51650 states and 121985 transitions. [2021-05-03 13:52:04,645 INFO L78 Accepts]: Start accepts. Automaton has 51650 states and 121985 transitions. Word has length 39 [2021-05-03 13:52:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:04,645 INFO L480 AbstractCegarLoop]: Abstraction has 51650 states and 121985 transitions. [2021-05-03 13:52:04,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 51650 states and 121985 transitions. [2021-05-03 13:52:04,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 13:52:04,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:04,665 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:04,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 13:52:04,866 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:04,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:04,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1172697878, now seen corresponding path program 104 times [2021-05-03 13:52:04,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:04,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416769228] [2021-05-03 13:52:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416769228] [2021-05-03 13:52:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337493402] [2021-05-03 13:52:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:04,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:04,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 13:52:04,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:04,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:04,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 13:52:04,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337727886] [2021-05-03 13:52:04,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 13:52:04,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:04,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 13:52:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-05-03 13:52:04,972 INFO L87 Difference]: Start difference. First operand 51650 states and 121985 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:05,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:05,367 INFO L93 Difference]: Finished difference Result 51895 states and 122112 transitions. [2021-05-03 13:52:05,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 13:52:05,368 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 13:52:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:05,435 INFO L225 Difference]: With dead ends: 51895 [2021-05-03 13:52:05,436 INFO L226 Difference]: Without dead ends: 51883 [2021-05-03 13:52:05,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 13:52:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51883 states. [2021-05-03 13:52:06,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51883 to 50789. [2021-05-03 13:52:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50789 states, 50788 states have (on average 2.3598684728676065) internal successors, (119853), 50788 states have internal predecessors, (119853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50789 states to 50789 states and 119853 transitions. [2021-05-03 13:52:06,248 INFO L78 Accepts]: Start accepts. Automaton has 50789 states and 119853 transitions. Word has length 39 [2021-05-03 13:52:06,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:06,249 INFO L480 AbstractCegarLoop]: Abstraction has 50789 states and 119853 transitions. [2021-05-03 13:52:06,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 50789 states and 119853 transitions. [2021-05-03 13:52:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 13:52:06,269 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:06,269 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:06,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-03 13:52:06,470 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:06,470 INFO L82 PathProgramCache]: Analyzing trace with hash -726293446, now seen corresponding path program 7 times [2021-05-03 13:52:06,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:06,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442357738] [2021-05-03 13:52:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:06,576 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-03 13:52:06,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442357738] [2021-05-03 13:52:06,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537480615] [2021-05-03 13:52:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 13:52:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-03 13:52:06,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:06,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 13:52:06,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768759207] [2021-05-03 13:52:06,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 13:52:06,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 13:52:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 13:52:06,744 INFO L87 Difference]: Start difference. First operand 50789 states and 119853 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:07,283 INFO L93 Difference]: Finished difference Result 50941 states and 120174 transitions. [2021-05-03 13:52:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 13:52:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-03 13:52:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:07,358 INFO L225 Difference]: With dead ends: 50941 [2021-05-03 13:52:07,358 INFO L226 Difference]: Without dead ends: 50818 [2021-05-03 13:52:07,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:52:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50818 states. [2021-05-03 13:52:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50818 to 50804. [2021-05-03 13:52:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50804 states, 50803 states have (on average 2.3597622187666083) internal successors, (119883), 50803 states have internal predecessors, (119883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:08,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50804 states to 50804 states and 119883 transitions. [2021-05-03 13:52:08,296 INFO L78 Accepts]: Start accepts. Automaton has 50804 states and 119883 transitions. Word has length 40 [2021-05-03 13:52:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:08,296 INFO L480 AbstractCegarLoop]: Abstraction has 50804 states and 119883 transitions. [2021-05-03 13:52:08,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 50804 states and 119883 transitions. [2021-05-03 13:52:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 13:52:08,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:08,318 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:08,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 13:52:08,518 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1306641550, now seen corresponding path program 105 times [2021-05-03 13:52:08,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:08,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261208144] [2021-05-03 13:52:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:52:08,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261208144] [2021-05-03 13:52:08,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234708855] [2021-05-03 13:52:08,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:08,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:52:08,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:52:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:52:08,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:08,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-03 13:52:08,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127586983] [2021-05-03 13:52:08,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:08,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:08,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:08,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:08,707 INFO L87 Difference]: Start difference. First operand 50804 states and 119883 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:09,301 INFO L93 Difference]: Finished difference Result 54165 states and 126813 transitions. [2021-05-03 13:52:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:52:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-03 13:52:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:09,384 INFO L225 Difference]: With dead ends: 54165 [2021-05-03 13:52:09,384 INFO L226 Difference]: Without dead ends: 54165 [2021-05-03 13:52:09,384 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:52:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54165 states. [2021-05-03 13:52:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54165 to 36411. [2021-05-03 13:52:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36411 states, 36410 states have (on average 2.3365558912386706) internal successors, (85074), 36410 states have internal predecessors, (85074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36411 states to 36411 states and 85074 transitions. [2021-05-03 13:52:09,921 INFO L78 Accepts]: Start accepts. Automaton has 36411 states and 85074 transitions. Word has length 41 [2021-05-03 13:52:09,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:09,921 INFO L480 AbstractCegarLoop]: Abstraction has 36411 states and 85074 transitions. [2021-05-03 13:52:09,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:09,921 INFO L276 IsEmpty]: Start isEmpty. Operand 36411 states and 85074 transitions. [2021-05-03 13:52:09,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 13:52:09,938 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:09,938 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:10,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-03 13:52:10,138 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:10,139 INFO L82 PathProgramCache]: Analyzing trace with hash -106564922, now seen corresponding path program 106 times [2021-05-03 13:52:10,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:10,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836892683] [2021-05-03 13:52:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:52:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836892683] [2021-05-03 13:52:10,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759267838] [2021-05-03 13:52:10,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:10,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:10,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:10,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 13:52:10,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:10,350 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-05-03 13:52:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 13:52:10,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:10,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-03 13:52:10,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875958789] [2021-05-03 13:52:10,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 13:52:10,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:10,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 13:52:10,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-05-03 13:52:10,449 INFO L87 Difference]: Start difference. First operand 36411 states and 85074 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:10,726 INFO L93 Difference]: Finished difference Result 34622 states and 78133 transitions. [2021-05-03 13:52:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:52:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-03 13:52:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:10,769 INFO L225 Difference]: With dead ends: 34622 [2021-05-03 13:52:10,769 INFO L226 Difference]: Without dead ends: 34550 [2021-05-03 13:52:10,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:52:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34550 states. [2021-05-03 13:52:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34550 to 32785. [2021-05-03 13:52:11,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32785 states, 32784 states have (on average 2.226634943875061) internal successors, (72998), 32784 states have internal predecessors, (72998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:11,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32785 states to 32785 states and 72998 transitions. [2021-05-03 13:52:11,154 INFO L78 Accepts]: Start accepts. Automaton has 32785 states and 72998 transitions. Word has length 41 [2021-05-03 13:52:11,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:11,154 INFO L480 AbstractCegarLoop]: Abstraction has 32785 states and 72998 transitions. [2021-05-03 13:52:11,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32785 states and 72998 transitions. [2021-05-03 13:52:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:11,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:11,172 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:11,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:11,373 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:11,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:11,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1447346081, now seen corresponding path program 107 times [2021-05-03 13:52:11,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:11,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437008486] [2021-05-03 13:52:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437008486] [2021-05-03 13:52:11,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477584016] [2021-05-03 13:52:11,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:11,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:52:11,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:11,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:11,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:11,877 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:11,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:11,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-03 13:52:11,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020913899] [2021-05-03 13:52:11,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:11,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:11,877 INFO L87 Difference]: Start difference. First operand 32785 states and 72998 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:12,706 INFO L93 Difference]: Finished difference Result 33955 states and 75388 transitions. [2021-05-03 13:52:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 13:52:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:12,749 INFO L225 Difference]: With dead ends: 33955 [2021-05-03 13:52:12,749 INFO L226 Difference]: Without dead ends: 33895 [2021-05-03 13:52:12,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:52:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33895 states. [2021-05-03 13:52:13,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33895 to 33327. [2021-05-03 13:52:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33327 states, 33326 states have (on average 2.2281701974434376) internal successors, (74256), 33326 states have internal predecessors, (74256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33327 states to 33327 states and 74256 transitions. [2021-05-03 13:52:13,260 INFO L78 Accepts]: Start accepts. Automaton has 33327 states and 74256 transitions. Word has length 42 [2021-05-03 13:52:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:13,261 INFO L480 AbstractCegarLoop]: Abstraction has 33327 states and 74256 transitions. [2021-05-03 13:52:13,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33327 states and 74256 transitions. [2021-05-03 13:52:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:13,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:13,281 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:13,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-03 13:52:13,481 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:13,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1017666921, now seen corresponding path program 108 times [2021-05-03 13:52:13,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:13,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154592674] [2021-05-03 13:52:13,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154592674] [2021-05-03 13:52:13,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213065367] [2021-05-03 13:52:13,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:13,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:52:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:13,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:13,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-03 13:52:13,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338270706] [2021-05-03 13:52:13,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:13,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:13,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:13,924 INFO L87 Difference]: Start difference. First operand 33327 states and 74256 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:14,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:14,723 INFO L93 Difference]: Finished difference Result 34237 states and 76081 transitions. [2021-05-03 13:52:14,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:52:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:14,765 INFO L225 Difference]: With dead ends: 34237 [2021-05-03 13:52:14,765 INFO L226 Difference]: Without dead ends: 34177 [2021-05-03 13:52:14,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 641.0ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 13:52:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34177 states. [2021-05-03 13:52:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34177 to 33689. [2021-05-03 13:52:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33689 states, 33688 states have (on average 2.2294585609118975) internal successors, (75106), 33688 states have internal predecessors, (75106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33689 states to 33689 states and 75106 transitions. [2021-05-03 13:52:15,263 INFO L78 Accepts]: Start accepts. Automaton has 33689 states and 75106 transitions. Word has length 42 [2021-05-03 13:52:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:15,263 INFO L480 AbstractCegarLoop]: Abstraction has 33689 states and 75106 transitions. [2021-05-03 13:52:15,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 33689 states and 75106 transitions. [2021-05-03 13:52:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:15,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:15,282 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:15,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:15,484 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1450512479, now seen corresponding path program 109 times [2021-05-03 13:52:15,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:15,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112060849] [2021-05-03 13:52:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:15,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112060849] [2021-05-03 13:52:15,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57608300] [2021-05-03 13:52:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:15,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:15,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:15,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:15,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-03 13:52:15,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710637400] [2021-05-03 13:52:15,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:15,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:15,894 INFO L87 Difference]: Start difference. First operand 33689 states and 75106 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:16,636 INFO L93 Difference]: Finished difference Result 35020 states and 77856 transitions. [2021-05-03 13:52:16,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:52:16,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:16,678 INFO L225 Difference]: With dead ends: 35020 [2021-05-03 13:52:16,678 INFO L226 Difference]: Without dead ends: 34968 [2021-05-03 13:52:16,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:52:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34968 states. [2021-05-03 13:52:17,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34968 to 33824. [2021-05-03 13:52:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33824 states, 33823 states have (on average 2.2299618602725957) internal successors, (75424), 33823 states have internal predecessors, (75424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33824 states to 33824 states and 75424 transitions. [2021-05-03 13:52:17,169 INFO L78 Accepts]: Start accepts. Automaton has 33824 states and 75424 transitions. Word has length 42 [2021-05-03 13:52:17,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:17,169 INFO L480 AbstractCegarLoop]: Abstraction has 33824 states and 75424 transitions. [2021-05-03 13:52:17,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 33824 states and 75424 transitions. [2021-05-03 13:52:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:17,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:17,189 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:17,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:17,389 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 188289943, now seen corresponding path program 110 times [2021-05-03 13:52:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:17,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21380729] [2021-05-03 13:52:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21380729] [2021-05-03 13:52:17,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319434562] [2021-05-03 13:52:17,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:17,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:17,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:17,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:17,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:17,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:52:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540964436] [2021-05-03 13:52:17,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:17,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:17,778 INFO L87 Difference]: Start difference. First operand 33824 states and 75424 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:18,386 INFO L93 Difference]: Finished difference Result 35348 states and 78730 transitions. [2021-05-03 13:52:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:52:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:18,430 INFO L225 Difference]: With dead ends: 35348 [2021-05-03 13:52:18,430 INFO L226 Difference]: Without dead ends: 35287 [2021-05-03 13:52:18,431 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:52:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35287 states. [2021-05-03 13:52:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35287 to 34771. [2021-05-03 13:52:18,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34771 states, 34770 states have (on average 2.23264308311763) internal successors, (77629), 34770 states have internal predecessors, (77629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34771 states to 34771 states and 77629 transitions. [2021-05-03 13:52:18,898 INFO L78 Accepts]: Start accepts. Automaton has 34771 states and 77629 transitions. Word has length 42 [2021-05-03 13:52:18,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:18,898 INFO L480 AbstractCegarLoop]: Abstraction has 34771 states and 77629 transitions. [2021-05-03 13:52:18,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 34771 states and 77629 transitions. [2021-05-03 13:52:18,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:18,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:18,917 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:19,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-05-03 13:52:19,118 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2091270305, now seen corresponding path program 111 times [2021-05-03 13:52:19,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:19,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342797968] [2021-05-03 13:52:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342797968] [2021-05-03 13:52:19,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775356563] [2021-05-03 13:52:19,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:19,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:52:19,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:19,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:19,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:19,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:19,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:19,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557718706] [2021-05-03 13:52:19,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:19,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:19,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:19,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:19,545 INFO L87 Difference]: Start difference. First operand 34771 states and 77629 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:20,441 INFO L93 Difference]: Finished difference Result 37628 states and 83716 transitions. [2021-05-03 13:52:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:52:20,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:20,485 INFO L225 Difference]: With dead ends: 37628 [2021-05-03 13:52:20,485 INFO L226 Difference]: Without dead ends: 37564 [2021-05-03 13:52:20,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 623.1ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:52:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37564 states. [2021-05-03 13:52:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37564 to 36693. [2021-05-03 13:52:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36693 states, 36692 states have (on average 2.234928594789055) internal successors, (82004), 36692 states have internal predecessors, (82004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36693 states to 36693 states and 82004 transitions. [2021-05-03 13:52:20,925 INFO L78 Accepts]: Start accepts. Automaton has 36693 states and 82004 transitions. Word has length 42 [2021-05-03 13:52:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:20,925 INFO L480 AbstractCegarLoop]: Abstraction has 36693 states and 82004 transitions. [2021-05-03 13:52:20,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 36693 states and 82004 transitions. [2021-05-03 13:52:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:20,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:20,945 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:21,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:21,152 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:21,153 INFO L82 PathProgramCache]: Analyzing trace with hash -52672187, now seen corresponding path program 112 times [2021-05-03 13:52:21,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:21,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071595764] [2021-05-03 13:52:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:21,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071595764] [2021-05-03 13:52:21,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070565809] [2021-05-03 13:52:21,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:21,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:21,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:21,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:21,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-03 13:52:21,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40242450] [2021-05-03 13:52:21,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:21,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:21,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:21,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:21,525 INFO L87 Difference]: Start difference. First operand 36693 states and 82004 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:22,289 INFO L93 Difference]: Finished difference Result 37468 states and 83561 transitions. [2021-05-03 13:52:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:52:22,290 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:22,333 INFO L225 Difference]: With dead ends: 37468 [2021-05-03 13:52:22,333 INFO L226 Difference]: Without dead ends: 37424 [2021-05-03 13:52:22,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:52:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37424 states. [2021-05-03 13:52:22,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37424 to 36988. [2021-05-03 13:52:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36988 states, 36987 states have (on average 2.2359207289047505) internal successors, (82700), 36987 states have internal predecessors, (82700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:22,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36988 states to 36988 states and 82700 transitions. [2021-05-03 13:52:22,765 INFO L78 Accepts]: Start accepts. Automaton has 36988 states and 82700 transitions. Word has length 42 [2021-05-03 13:52:22,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:22,765 INFO L480 AbstractCegarLoop]: Abstraction has 36988 states and 82700 transitions. [2021-05-03 13:52:22,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36988 states and 82700 transitions. [2021-05-03 13:52:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:22,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:22,786 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:22,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:22,987 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1631758035, now seen corresponding path program 113 times [2021-05-03 13:52:22,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:22,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883286129] [2021-05-03 13:52:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:23,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883286129] [2021-05-03 13:52:23,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292298079] [2021-05-03 13:52:23,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:23,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:52:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:23,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:23,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:23,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-05-03 13:52:23,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216521856] [2021-05-03 13:52:23,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:23,401 INFO L87 Difference]: Start difference. First operand 36988 states and 82700 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:24,239 INFO L93 Difference]: Finished difference Result 37883 states and 84505 transitions. [2021-05-03 13:52:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:52:24,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:24,285 INFO L225 Difference]: With dead ends: 37883 [2021-05-03 13:52:24,286 INFO L226 Difference]: Without dead ends: 37825 [2021-05-03 13:52:24,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 625.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:52:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37825 states. [2021-05-03 13:52:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37825 to 37336. [2021-05-03 13:52:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37336 states, 37335 states have (on average 2.2370162046337216) internal successors, (83519), 37335 states have internal predecessors, (83519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:24,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37336 states to 37336 states and 83519 transitions. [2021-05-03 13:52:24,755 INFO L78 Accepts]: Start accepts. Automaton has 37336 states and 83519 transitions. Word has length 42 [2021-05-03 13:52:24,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:24,755 INFO L480 AbstractCegarLoop]: Abstraction has 37336 states and 83519 transitions. [2021-05-03 13:52:24,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:24,755 INFO L276 IsEmpty]: Start isEmpty. Operand 37336 states and 83519 transitions. [2021-05-03 13:52:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:24,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:24,777 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:24,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-03 13:52:24,977 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 836421365, now seen corresponding path program 114 times [2021-05-03 13:52:24,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:24,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974302958] [2021-05-03 13:52:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:25,116 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:25,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974302958] [2021-05-03 13:52:25,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536550514] [2021-05-03 13:52:25,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:25,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:52:25,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:25,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:25,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:25,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:25,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:52:25,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176569553] [2021-05-03 13:52:25,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:25,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:25,387 INFO L87 Difference]: Start difference. First operand 37336 states and 83519 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:26,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:26,323 INFO L93 Difference]: Finished difference Result 42560 states and 95111 transitions. [2021-05-03 13:52:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:52:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:26,378 INFO L225 Difference]: With dead ends: 42560 [2021-05-03 13:52:26,378 INFO L226 Difference]: Without dead ends: 42505 [2021-05-03 13:52:26,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 607.9ms TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:52:26,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42505 states. [2021-05-03 13:52:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42505 to 41364. [2021-05-03 13:52:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41364 states, 41363 states have (on average 2.2458477383168534) internal successors, (92895), 41363 states have internal predecessors, (92895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41364 states to 41364 states and 92895 transitions. [2021-05-03 13:52:26,963 INFO L78 Accepts]: Start accepts. Automaton has 41364 states and 92895 transitions. Word has length 42 [2021-05-03 13:52:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:26,963 INFO L480 AbstractCegarLoop]: Abstraction has 41364 states and 92895 transitions. [2021-05-03 13:52:26,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:26,963 INFO L276 IsEmpty]: Start isEmpty. Operand 41364 states and 92895 transitions. [2021-05-03 13:52:26,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:26,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:26,985 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:27,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:27,185 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:27,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:27,186 INFO L82 PathProgramCache]: Analyzing trace with hash -425801171, now seen corresponding path program 115 times [2021-05-03 13:52:27,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:27,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995305015] [2021-05-03 13:52:27,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:27,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995305015] [2021-05-03 13:52:27,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174790202] [2021-05-03 13:52:27,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:27,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:27,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:27,637 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:27,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:27,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:52:27,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972881406] [2021-05-03 13:52:27,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:27,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:27,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:27,638 INFO L87 Difference]: Start difference. First operand 41364 states and 92895 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:28,211 INFO L93 Difference]: Finished difference Result 42177 states and 94600 transitions. [2021-05-03 13:52:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:52:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:28,265 INFO L225 Difference]: With dead ends: 42177 [2021-05-03 13:52:28,265 INFO L226 Difference]: Without dead ends: 42122 [2021-05-03 13:52:28,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:52:28,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42122 states. [2021-05-03 13:52:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42122 to 41392. [2021-05-03 13:52:28,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41392 states, 41391 states have (on average 2.2448599937184412) internal successors, (92917), 41391 states have internal predecessors, (92917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41392 states to 41392 states and 92917 transitions. [2021-05-03 13:52:28,888 INFO L78 Accepts]: Start accepts. Automaton has 41392 states and 92917 transitions. Word has length 42 [2021-05-03 13:52:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:28,888 INFO L480 AbstractCegarLoop]: Abstraction has 41392 states and 92917 transitions. [2021-05-03 13:52:28,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 41392 states and 92917 transitions. [2021-05-03 13:52:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:28,911 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:28,911 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:29,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-03 13:52:29,112 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash 322148699, now seen corresponding path program 116 times [2021-05-03 13:52:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:29,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278474465] [2021-05-03 13:52:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:29,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278474465] [2021-05-03 13:52:29,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441981787] [2021-05-03 13:52:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:29,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:29,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:29,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:29,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23736728] [2021-05-03 13:52:29,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:29,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:29,539 INFO L87 Difference]: Start difference. First operand 41392 states and 92917 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:30,208 INFO L93 Difference]: Finished difference Result 43200 states and 96836 transitions. [2021-05-03 13:52:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:52:30,209 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:30,267 INFO L225 Difference]: With dead ends: 43200 [2021-05-03 13:52:30,267 INFO L226 Difference]: Without dead ends: 43139 [2021-05-03 13:52:30,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:52:30,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43139 states. [2021-05-03 13:52:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43139 to 42274. [2021-05-03 13:52:30,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42274 states, 42273 states have (on average 2.245641425969295) internal successors, (94930), 42273 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42274 states to 42274 states and 94930 transitions. [2021-05-03 13:52:30,786 INFO L78 Accepts]: Start accepts. Automaton has 42274 states and 94930 transitions. Word has length 42 [2021-05-03 13:52:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:30,786 INFO L480 AbstractCegarLoop]: Abstraction has 42274 states and 94930 transitions. [2021-05-03 13:52:30,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 42274 states and 94930 transitions. [2021-05-03 13:52:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:31,037 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:31,037 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:31,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:31,244 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash -709466537, now seen corresponding path program 117 times [2021-05-03 13:52:31,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:31,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968771759] [2021-05-03 13:52:31,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:31,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:31,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968771759] [2021-05-03 13:52:31,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373435926] [2021-05-03 13:52:31,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:52:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:31,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:31,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:31,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:31,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733467087] [2021-05-03 13:52:31,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:31,746 INFO L87 Difference]: Start difference. First operand 42274 states and 94930 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:32,727 INFO L93 Difference]: Finished difference Result 43593 states and 97722 transitions. [2021-05-03 13:52:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:52:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:32,778 INFO L225 Difference]: With dead ends: 43593 [2021-05-03 13:52:32,778 INFO L226 Difference]: Without dead ends: 43522 [2021-05-03 13:52:32,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:52:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43522 states. [2021-05-03 13:52:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43522 to 42894. [2021-05-03 13:52:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42894 states, 42893 states have (on average 2.2458443102604155) internal successors, (96331), 42893 states have internal predecessors, (96331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42894 states to 42894 states and 96331 transitions. [2021-05-03 13:52:33,379 INFO L78 Accepts]: Start accepts. Automaton has 42894 states and 96331 transitions. Word has length 42 [2021-05-03 13:52:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:33,379 INFO L480 AbstractCegarLoop]: Abstraction has 42894 states and 96331 transitions. [2021-05-03 13:52:33,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 42894 states and 96331 transitions. [2021-05-03 13:52:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:33,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:33,403 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:33,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-03 13:52:33,605 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:33,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:33,605 INFO L82 PathProgramCache]: Analyzing trace with hash 43717975, now seen corresponding path program 118 times [2021-05-03 13:52:33,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:33,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422532054] [2021-05-03 13:52:33,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:33,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422532054] [2021-05-03 13:52:33,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778921220] [2021-05-03 13:52:33,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:33,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:33,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:34,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:34,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:34,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865341061] [2021-05-03 13:52:34,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:34,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:34,031 INFO L87 Difference]: Start difference. First operand 42894 states and 96331 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:34,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:34,800 INFO L93 Difference]: Finished difference Result 44838 states and 100520 transitions. [2021-05-03 13:52:34,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:52:34,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:34,854 INFO L225 Difference]: With dead ends: 44838 [2021-05-03 13:52:34,855 INFO L226 Difference]: Without dead ends: 44755 [2021-05-03 13:52:34,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:52:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44755 states. [2021-05-03 13:52:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44755 to 42260. [2021-05-03 13:52:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42260 states, 42259 states have (on average 2.245367850635368) internal successors, (94887), 42259 states have internal predecessors, (94887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42260 states to 42260 states and 94887 transitions. [2021-05-03 13:52:35,444 INFO L78 Accepts]: Start accepts. Automaton has 42260 states and 94887 transitions. Word has length 42 [2021-05-03 13:52:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:35,444 INFO L480 AbstractCegarLoop]: Abstraction has 42260 states and 94887 transitions. [2021-05-03 13:52:35,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 42260 states and 94887 transitions. [2021-05-03 13:52:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:35,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:35,467 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:35,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:35,667 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:35,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:35,668 INFO L82 PathProgramCache]: Analyzing trace with hash -764997097, now seen corresponding path program 119 times [2021-05-03 13:52:35,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:35,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774108634] [2021-05-03 13:52:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774108634] [2021-05-03 13:52:35,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597252691] [2021-05-03 13:52:35,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:35,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-03 13:52:35,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:35,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:36,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:36,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:36,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337213576] [2021-05-03 13:52:36,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:36,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:36,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:36,118 INFO L87 Difference]: Start difference. First operand 42260 states and 94887 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:36,964 INFO L93 Difference]: Finished difference Result 45004 states and 100851 transitions. [2021-05-03 13:52:36,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:52:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:37,021 INFO L225 Difference]: With dead ends: 45004 [2021-05-03 13:52:37,021 INFO L226 Difference]: Without dead ends: 44951 [2021-05-03 13:52:37,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:52:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44951 states. [2021-05-03 13:52:37,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44951 to 44047. [2021-05-03 13:52:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44047 states, 44046 states have (on average 2.2477182945102845) internal successors, (99003), 44046 states have internal predecessors, (99003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44047 states to 44047 states and 99003 transitions. [2021-05-03 13:52:37,756 INFO L78 Accepts]: Start accepts. Automaton has 44047 states and 99003 transitions. Word has length 42 [2021-05-03 13:52:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:37,756 INFO L480 AbstractCegarLoop]: Abstraction has 44047 states and 99003 transitions. [2021-05-03 13:52:37,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:37,757 INFO L276 IsEmpty]: Start isEmpty. Operand 44047 states and 99003 transitions. [2021-05-03 13:52:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:37,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:37,782 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:37,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 13:52:37,985 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2001638735, now seen corresponding path program 120 times [2021-05-03 13:52:37,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:37,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466776609] [2021-05-03 13:52:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:38,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466776609] [2021-05-03 13:52:38,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441246361] [2021-05-03 13:52:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:38,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:52:38,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:38,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:38,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378521170] [2021-05-03 13:52:38,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:38,474 INFO L87 Difference]: Start difference. First operand 44047 states and 99003 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:39,350 INFO L93 Difference]: Finished difference Result 47479 states and 106568 transitions. [2021-05-03 13:52:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:52:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:39,410 INFO L225 Difference]: With dead ends: 47479 [2021-05-03 13:52:39,410 INFO L226 Difference]: Without dead ends: 47408 [2021-05-03 13:52:39,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:52:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47408 states. [2021-05-03 13:52:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47408 to 43786. [2021-05-03 13:52:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43786 states, 43785 states have (on average 2.247847436336645) internal successors, (98422), 43785 states have internal predecessors, (98422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43786 states to 43786 states and 98422 transitions. [2021-05-03 13:52:40,043 INFO L78 Accepts]: Start accepts. Automaton has 43786 states and 98422 transitions. Word has length 42 [2021-05-03 13:52:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:40,043 INFO L480 AbstractCegarLoop]: Abstraction has 43786 states and 98422 transitions. [2021-05-03 13:52:40,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 43786 states and 98422 transitions. [2021-05-03 13:52:40,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:40,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:40,066 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:40,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:40,267 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:40,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:40,267 INFO L82 PathProgramCache]: Analyzing trace with hash 540545751, now seen corresponding path program 121 times [2021-05-03 13:52:40,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:40,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017196374] [2021-05-03 13:52:40,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:40,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:40,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017196374] [2021-05-03 13:52:40,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674204389] [2021-05-03 13:52:40,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:40,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:40,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:40,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:40,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-03 13:52:40,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497396983] [2021-05-03 13:52:40,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:40,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:40,648 INFO L87 Difference]: Start difference. First operand 43786 states and 98422 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:41,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:41,431 INFO L93 Difference]: Finished difference Result 44309 states and 99482 transitions. [2021-05-03 13:52:41,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 13:52:41,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:41,477 INFO L225 Difference]: With dead ends: 44309 [2021-05-03 13:52:41,477 INFO L226 Difference]: Without dead ends: 44269 [2021-05-03 13:52:41,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:52:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44269 states. [2021-05-03 13:52:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44269 to 44009. [2021-05-03 13:52:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44009 states, 44008 states have (on average 2.2482957644064716) internal successors, (98943), 44008 states have internal predecessors, (98943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44009 states to 44009 states and 98943 transitions. [2021-05-03 13:52:41,977 INFO L78 Accepts]: Start accepts. Automaton has 44009 states and 98943 transitions. Word has length 42 [2021-05-03 13:52:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:41,977 INFO L480 AbstractCegarLoop]: Abstraction has 44009 states and 98943 transitions. [2021-05-03 13:52:41,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 44009 states and 98943 transitions. [2021-05-03 13:52:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:41,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:41,999 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:42,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:42,200 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1746502615, now seen corresponding path program 122 times [2021-05-03 13:52:42,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:42,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864003664] [2021-05-03 13:52:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:42,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864003664] [2021-05-03 13:52:42,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075699993] [2021-05-03 13:52:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:42,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:42,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:42,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:52:42,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176298627] [2021-05-03 13:52:42,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:42,752 INFO L87 Difference]: Start difference. First operand 44009 states and 98943 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:43,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:43,449 INFO L93 Difference]: Finished difference Result 44985 states and 100996 transitions. [2021-05-03 13:52:43,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 13:52:43,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:43,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:43,505 INFO L225 Difference]: With dead ends: 44985 [2021-05-03 13:52:43,506 INFO L226 Difference]: Without dead ends: 44934 [2021-05-03 13:52:43,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:52:43,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44934 states. [2021-05-03 13:52:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44934 to 44309. [2021-05-03 13:52:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44309 states, 44308 states have (on average 2.248081610544371) internal successors, (99608), 44308 states have internal predecessors, (99608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44309 states to 44309 states and 99608 transitions. [2021-05-03 13:52:44,123 INFO L78 Accepts]: Start accepts. Automaton has 44309 states and 99608 transitions. Word has length 42 [2021-05-03 13:52:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:44,123 INFO L480 AbstractCegarLoop]: Abstraction has 44309 states and 99608 transitions. [2021-05-03 13:52:44,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 44309 states and 99608 transitions. [2021-05-03 13:52:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:44,148 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:44,148 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:44,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:44,349 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1800514811, now seen corresponding path program 123 times [2021-05-03 13:52:44,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:44,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837337490] [2021-05-03 13:52:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:44,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837337490] [2021-05-03 13:52:44,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463730307] [2021-05-03 13:52:44,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:44,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 13:52:44,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:44,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:44,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:44,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212425213] [2021-05-03 13:52:44,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:44,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:44,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:44,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:44,804 INFO L87 Difference]: Start difference. First operand 44309 states and 99608 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:45,912 INFO L93 Difference]: Finished difference Result 49164 states and 110220 transitions. [2021-05-03 13:52:45,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:52:45,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:45,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:45,970 INFO L225 Difference]: With dead ends: 49164 [2021-05-03 13:52:45,971 INFO L226 Difference]: Without dead ends: 49079 [2021-05-03 13:52:45,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:52:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49079 states. [2021-05-03 13:52:46,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49079 to 47944. [2021-05-03 13:52:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47944 states, 47943 states have (on average 2.2517990113259496) internal successors, (107958), 47943 states have internal predecessors, (107958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47944 states to 47944 states and 107958 transitions. [2021-05-03 13:52:46,663 INFO L78 Accepts]: Start accepts. Automaton has 47944 states and 107958 transitions. Word has length 42 [2021-05-03 13:52:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:46,663 INFO L480 AbstractCegarLoop]: Abstraction has 47944 states and 107958 transitions. [2021-05-03 13:52:46,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 47944 states and 107958 transitions. [2021-05-03 13:52:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:46,690 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:46,690 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:46,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-03 13:52:46,891 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash 200614713, now seen corresponding path program 124 times [2021-05-03 13:52:46,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:46,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71082689] [2021-05-03 13:52:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:47,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71082689] [2021-05-03 13:52:47,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140122099] [2021-05-03 13:52:47,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:47,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:52:47,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:47,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:47,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:47,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:47,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:52:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354346729] [2021-05-03 13:52:47,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:47,470 INFO L87 Difference]: Start difference. First operand 47944 states and 107958 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:48,188 INFO L93 Difference]: Finished difference Result 48735 states and 109617 transitions. [2021-05-03 13:52:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:52:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:48,253 INFO L225 Difference]: With dead ends: 48735 [2021-05-03 13:52:48,253 INFO L226 Difference]: Without dead ends: 48700 [2021-05-03 13:52:48,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:52:48,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48700 states. [2021-05-03 13:52:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48700 to 47968. [2021-05-03 13:52:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47968 states, 47967 states have (on average 2.2517355682031397) internal successors, (108009), 47967 states have internal predecessors, (108009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:48,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47968 states to 47968 states and 108009 transitions. [2021-05-03 13:52:48,949 INFO L78 Accepts]: Start accepts. Automaton has 47968 states and 108009 transitions. Word has length 42 [2021-05-03 13:52:48,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:48,949 INFO L480 AbstractCegarLoop]: Abstraction has 47968 states and 108009 transitions. [2021-05-03 13:52:48,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:48,949 INFO L276 IsEmpty]: Start isEmpty. Operand 47968 states and 108009 transitions. [2021-05-03 13:52:48,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:48,981 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:48,981 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:49,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 13:52:49,181 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:49,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:49,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1810152655, now seen corresponding path program 125 times [2021-05-03 13:52:49,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:49,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705176730] [2021-05-03 13:52:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:49,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:49,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705176730] [2021-05-03 13:52:49,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696098716] [2021-05-03 13:52:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:49,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:52:49,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:49,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:49,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:49,604 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:49,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:49,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 13:52:49,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902431554] [2021-05-03 13:52:49,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:49,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:49,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:49,605 INFO L87 Difference]: Start difference. First operand 47968 states and 108009 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:50,328 INFO L93 Difference]: Finished difference Result 51644 states and 116036 transitions. [2021-05-03 13:52:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:52:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:50,391 INFO L225 Difference]: With dead ends: 51644 [2021-05-03 13:52:50,391 INFO L226 Difference]: Without dead ends: 51544 [2021-05-03 13:52:50,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:52:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51544 states. [2021-05-03 13:52:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51544 to 49010. [2021-05-03 13:52:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49010 states, 49009 states have (on average 2.252402619926952) internal successors, (110388), 49009 states have internal predecessors, (110388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49010 states to 49010 states and 110388 transitions. [2021-05-03 13:52:51,074 INFO L78 Accepts]: Start accepts. Automaton has 49010 states and 110388 transitions. Word has length 42 [2021-05-03 13:52:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:51,074 INFO L480 AbstractCegarLoop]: Abstraction has 49010 states and 110388 transitions. [2021-05-03 13:52:51,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 49010 states and 110388 transitions. [2021-05-03 13:52:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:51,105 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:51,105 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:51,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-03 13:52:51,305 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:51,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:51,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1407306689, now seen corresponding path program 126 times [2021-05-03 13:52:51,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:51,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470148077] [2021-05-03 13:52:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:51,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470148077] [2021-05-03 13:52:51,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930026974] [2021-05-03 13:52:51,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:51,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:52:51,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:51,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:51,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:52:51,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:51,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:52:51,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993672216] [2021-05-03 13:52:51,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:52:51,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:51,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:52:51,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:52:51,761 INFO L87 Difference]: Start difference. First operand 49010 states and 110388 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:52,737 INFO L93 Difference]: Finished difference Result 50673 states and 113916 transitions. [2021-05-03 13:52:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:52:52,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:52,806 INFO L225 Difference]: With dead ends: 50673 [2021-05-03 13:52:52,806 INFO L226 Difference]: Without dead ends: 50620 [2021-05-03 13:52:52,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:52:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50620 states. [2021-05-03 13:52:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50620 to 50130. [2021-05-03 13:52:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50130 states, 50129 states have (on average 2.2520497117437013) internal successors, (112893), 50129 states have internal predecessors, (112893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50130 states to 50130 states and 112893 transitions. [2021-05-03 13:52:53,596 INFO L78 Accepts]: Start accepts. Automaton has 50130 states and 112893 transitions. Word has length 42 [2021-05-03 13:52:53,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:53,596 INFO L480 AbstractCegarLoop]: Abstraction has 50130 states and 112893 transitions. [2021-05-03 13:52:53,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:53,596 INFO L276 IsEmpty]: Start isEmpty. Operand 50130 states and 112893 transitions. [2021-05-03 13:52:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:53,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:53,631 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:53,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-03 13:52:53,831 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:53,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1844741997, now seen corresponding path program 127 times [2021-05-03 13:52:53,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:53,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381326587] [2021-05-03 13:52:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:54,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381326587] [2021-05-03 13:52:54,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436391633] [2021-05-03 13:52:54,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:54,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:54,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:54,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:54,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:52:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752824477] [2021-05-03 13:52:54,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:52:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:54,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:52:54,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:52:54,277 INFO L87 Difference]: Start difference. First operand 50130 states and 112893 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:55,013 INFO L93 Difference]: Finished difference Result 50981 states and 114695 transitions. [2021-05-03 13:52:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:52:55,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:55,082 INFO L225 Difference]: With dead ends: 50981 [2021-05-03 13:52:55,082 INFO L226 Difference]: Without dead ends: 50938 [2021-05-03 13:52:55,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:52:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50938 states. [2021-05-03 13:52:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50938 to 50107. [2021-05-03 13:52:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50107 states, 50106 states have (on average 2.252165409332216) internal successors, (112847), 50106 states have internal predecessors, (112847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:55,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50107 states to 50107 states and 112847 transitions. [2021-05-03 13:52:55,863 INFO L78 Accepts]: Start accepts. Automaton has 50107 states and 112847 transitions. Word has length 42 [2021-05-03 13:52:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:55,863 INFO L480 AbstractCegarLoop]: Abstraction has 50107 states and 112847 transitions. [2021-05-03 13:52:55,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 50107 states and 112847 transitions. [2021-05-03 13:52:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:55,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:55,895 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:56,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-03 13:52:56,096 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:56,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:56,096 INFO L82 PathProgramCache]: Analyzing trace with hash -581214207, now seen corresponding path program 128 times [2021-05-03 13:52:56,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:56,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977223286] [2021-05-03 13:52:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:56,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977223286] [2021-05-03 13:52:56,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727890174] [2021-05-03 13:52:56,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:56,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:52:56,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:56,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:56,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:56,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:56,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-03 13:52:56,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798538903] [2021-05-03 13:52:56,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:52:56,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:52:56,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:52:56,500 INFO L87 Difference]: Start difference. First operand 50107 states and 112847 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:52:57,515 INFO L93 Difference]: Finished difference Result 50602 states and 113853 transitions. [2021-05-03 13:52:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:52:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:52:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:52:57,591 INFO L225 Difference]: With dead ends: 50602 [2021-05-03 13:52:57,591 INFO L226 Difference]: Without dead ends: 50562 [2021-05-03 13:52:57,591 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:52:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50562 states. [2021-05-03 13:52:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50562 to 50341. [2021-05-03 13:52:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50341 states, 50340 states have (on average 2.252522844656337) internal successors, (113392), 50340 states have internal predecessors, (113392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50341 states to 50341 states and 113392 transitions. [2021-05-03 13:52:58,465 INFO L78 Accepts]: Start accepts. Automaton has 50341 states and 113392 transitions. Word has length 42 [2021-05-03 13:52:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:52:58,465 INFO L480 AbstractCegarLoop]: Abstraction has 50341 states and 113392 transitions. [2021-05-03 13:52:58,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:52:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 50341 states and 113392 transitions. [2021-05-03 13:52:58,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:52:58,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:52:58,499 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:52:58,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:58,700 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:52:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:52:58,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1444303521, now seen corresponding path program 129 times [2021-05-03 13:52:58,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:52:58,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708113804] [2021-05-03 13:52:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:52:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:52:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:52:58,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708113804] [2021-05-03 13:52:58,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675101433] [2021-05-03 13:52:58,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:52:58,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:52:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:52:58,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:52:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:52:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:52:59,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:52:59,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-03 13:52:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741178611] [2021-05-03 13:52:59,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:52:59,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:52:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:52:59,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:52:59,169 INFO L87 Difference]: Start difference. First operand 50341 states and 113392 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:00,429 INFO L93 Difference]: Finished difference Result 54084 states and 121478 transitions. [2021-05-03 13:53:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:53:00,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:00,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:00,494 INFO L225 Difference]: With dead ends: 54084 [2021-05-03 13:53:00,494 INFO L226 Difference]: Without dead ends: 54013 [2021-05-03 13:53:00,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:53:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54013 states. [2021-05-03 13:53:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54013 to 53169. [2021-05-03 13:53:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53169 states, 53168 states have (on average 2.254043785735781) internal successors, (119843), 53168 states have internal predecessors, (119843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 119843 transitions. [2021-05-03 13:53:01,285 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 119843 transitions. Word has length 42 [2021-05-03 13:53:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:01,285 INFO L480 AbstractCegarLoop]: Abstraction has 53169 states and 119843 transitions. [2021-05-03 13:53:01,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 119843 transitions. [2021-05-03 13:53:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:01,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:01,318 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:01,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-03 13:53:01,519 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash 29410071, now seen corresponding path program 130 times [2021-05-03 13:53:01,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:01,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549872575] [2021-05-03 13:53:01,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549872575] [2021-05-03 13:53:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822263955] [2021-05-03 13:53:01,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:01,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:01,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:01,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 13:53:02,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:02,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-03 13:53:02,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781515488] [2021-05-03 13:53:02,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:02,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:02,059 INFO L87 Difference]: Start difference. First operand 53169 states and 119843 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:02,753 INFO L93 Difference]: Finished difference Result 57178 states and 128792 transitions. [2021-05-03 13:53:02,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 13:53:02,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:02,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:02,829 INFO L225 Difference]: With dead ends: 57178 [2021-05-03 13:53:02,829 INFO L226 Difference]: Without dead ends: 57113 [2021-05-03 13:53:02,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 667.3ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:53:02,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57113 states. [2021-05-03 13:53:03,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57113 to 52644. [2021-05-03 13:53:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52644 states, 52643 states have (on average 2.2556085329483504) internal successors, (118742), 52643 states have internal predecessors, (118742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:03,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52644 states to 52644 states and 118742 transitions. [2021-05-03 13:53:03,627 INFO L78 Accepts]: Start accepts. Automaton has 52644 states and 118742 transitions. Word has length 42 [2021-05-03 13:53:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:03,627 INFO L480 AbstractCegarLoop]: Abstraction has 52644 states and 118742 transitions. [2021-05-03 13:53:03,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52644 states and 118742 transitions. [2021-05-03 13:53:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:03,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:03,665 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:03,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:03,866 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1499834081, now seen corresponding path program 131 times [2021-05-03 13:53:03,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:03,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027994819] [2021-05-03 13:53:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:04,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027994819] [2021-05-03 13:53:04,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614218945] [2021-05-03 13:53:04,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:04,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:53:04,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:04,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:04,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:53:04,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:04,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:53:04,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453149909] [2021-05-03 13:53:04,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:53:04,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:53:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:04,297 INFO L87 Difference]: Start difference. First operand 52644 states and 118742 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:05,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:05,212 INFO L93 Difference]: Finished difference Result 54729 states and 123160 transitions. [2021-05-03 13:53:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:53:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:05,289 INFO L225 Difference]: With dead ends: 54729 [2021-05-03 13:53:05,289 INFO L226 Difference]: Without dead ends: 54629 [2021-05-03 13:53:05,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 661.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 13:53:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54629 states. [2021-05-03 13:53:06,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54629 to 52701. [2021-05-03 13:53:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52701 states, 52700 states have (on average 2.2552182163187857) internal successors, (118850), 52700 states have internal predecessors, (118850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52701 states to 52701 states and 118850 transitions. [2021-05-03 13:53:06,146 INFO L78 Accepts]: Start accepts. Automaton has 52701 states and 118850 transitions. Word has length 42 [2021-05-03 13:53:06,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:06,146 INFO L480 AbstractCegarLoop]: Abstraction has 52701 states and 118850 transitions. [2021-05-03 13:53:06,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 22 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 52701 states and 118850 transitions. [2021-05-03 13:53:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:06,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:06,180 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:06,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:06,380 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash -367050537, now seen corresponding path program 132 times [2021-05-03 13:53:06,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:06,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761030427] [2021-05-03 13:53:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:06,515 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:06,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761030427] [2021-05-03 13:53:06,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722788491] [2021-05-03 13:53:06,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:06,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:53:06,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:53:06,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:06,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-05-03 13:53:06,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612406262] [2021-05-03 13:53:06,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:06,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:06,953 INFO L87 Difference]: Start difference. First operand 52701 states and 118850 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:07,681 INFO L93 Difference]: Finished difference Result 56271 states and 126636 transitions. [2021-05-03 13:53:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:53:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:07,769 INFO L225 Difference]: With dead ends: 56271 [2021-05-03 13:53:07,770 INFO L226 Difference]: Without dead ends: 56195 [2021-05-03 13:53:07,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-03 13:53:07,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56195 states. [2021-05-03 13:53:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56195 to 54531. [2021-05-03 13:53:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54531 states, 54530 states have (on average 2.256684393911608) internal successors, (123057), 54530 states have internal predecessors, (123057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54531 states to 54531 states and 123057 transitions. [2021-05-03 13:53:08,619 INFO L78 Accepts]: Start accepts. Automaton has 54531 states and 123057 transitions. Word has length 42 [2021-05-03 13:53:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:08,619 INFO L480 AbstractCegarLoop]: Abstraction has 54531 states and 123057 transitions. [2021-05-03 13:53:08,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 54531 states and 123057 transitions. [2021-05-03 13:53:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:08,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:08,660 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:08,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:08,865 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash 835986527, now seen corresponding path program 133 times [2021-05-03 13:53:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:08,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162869868] [2021-05-03 13:53:08,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:09,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162869868] [2021-05-03 13:53:09,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556368578] [2021-05-03 13:53:09,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:09,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:53:09,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:09,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-05-03 13:53:09,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922092621] [2021-05-03 13:53:09,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:09,291 INFO L87 Difference]: Start difference. First operand 54531 states and 123057 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:09,864 INFO L93 Difference]: Finished difference Result 56394 states and 127052 transitions. [2021-05-03 13:53:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 13:53:09,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:09,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:09,940 INFO L225 Difference]: With dead ends: 56394 [2021-05-03 13:53:09,941 INFO L226 Difference]: Without dead ends: 56355 [2021-05-03 13:53:09,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-05-03 13:53:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56355 states. [2021-05-03 13:53:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56355 to 55760. [2021-05-03 13:53:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55760 states, 55759 states have (on average 2.2566222493229793) internal successors, (125827), 55759 states have internal predecessors, (125827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55760 states to 55760 states and 125827 transitions. [2021-05-03 13:53:10,789 INFO L78 Accepts]: Start accepts. Automaton has 55760 states and 125827 transitions. Word has length 42 [2021-05-03 13:53:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:10,789 INFO L480 AbstractCegarLoop]: Abstraction has 55760 states and 125827 transitions. [2021-05-03 13:53:10,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 55760 states and 125827 transitions. [2021-05-03 13:53:10,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:10,824 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:10,824 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:11,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:11,025 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1067721981, now seen corresponding path program 134 times [2021-05-03 13:53:11,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:11,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969701407] [2021-05-03 13:53:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969701407] [2021-05-03 13:53:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832083101] [2021-05-03 13:53:11,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:11,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:11,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:11,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:11,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:53:11,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:11,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:53:11,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767728378] [2021-05-03 13:53:11,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:11,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:11,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:11,695 INFO L87 Difference]: Start difference. First operand 55760 states and 125827 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:12,602 INFO L93 Difference]: Finished difference Result 57019 states and 128491 transitions. [2021-05-03 13:53:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 13:53:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:12,673 INFO L225 Difference]: With dead ends: 57019 [2021-05-03 13:53:12,673 INFO L226 Difference]: Without dead ends: 56955 [2021-05-03 13:53:12,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-05-03 13:53:12,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56955 states. [2021-05-03 13:53:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56955 to 55709. [2021-05-03 13:53:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55709 states, 55708 states have (on average 2.2564981690241974) internal successors, (125705), 55708 states have internal predecessors, (125705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:13,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55709 states to 55709 states and 125705 transitions. [2021-05-03 13:53:13,531 INFO L78 Accepts]: Start accepts. Automaton has 55709 states and 125705 transitions. Word has length 42 [2021-05-03 13:53:13,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:13,531 INFO L480 AbstractCegarLoop]: Abstraction has 55709 states and 125705 transitions. [2021-05-03 13:53:13,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:13,531 INFO L276 IsEmpty]: Start isEmpty. Operand 55709 states and 125705 transitions. [2021-05-03 13:53:13,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:13,567 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:13,567 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:13,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 13:53:13,767 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:13,767 INFO L82 PathProgramCache]: Analyzing trace with hash -171286659, now seen corresponding path program 135 times [2021-05-03 13:53:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125339852] [2021-05-03 13:53:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:13,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125339852] [2021-05-03 13:53:13,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572635615] [2021-05-03 13:53:13,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:13,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:53:13,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:14,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-05-03 13:53:14,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698964848] [2021-05-03 13:53:14,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 13:53:14,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:14,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 13:53:14,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:14,193 INFO L87 Difference]: Start difference. First operand 55709 states and 125705 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:15,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:15,427 INFO L93 Difference]: Finished difference Result 59486 states and 133971 transitions. [2021-05-03 13:53:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 13:53:15,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:15,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:15,506 INFO L225 Difference]: With dead ends: 59486 [2021-05-03 13:53:15,506 INFO L226 Difference]: Without dead ends: 59421 [2021-05-03 13:53:15,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 624.8ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:53:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59421 states. [2021-05-03 13:53:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59421 to 55326. [2021-05-03 13:53:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-05-03 13:53:16,507 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-05-03 13:53:16,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:16,507 INFO L480 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-05-03 13:53:16,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:16,507 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-05-03 13:53:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:16,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:16,539 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:16,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 13:53:16,741 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2020553339, now seen corresponding path program 136 times [2021-05-03 13:53:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:16,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271088512] [2021-05-03 13:53:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271088512] [2021-05-03 13:53:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073720482] [2021-05-03 13:53:16,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:16,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:16,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:16,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 13:53:17,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:17,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2021-05-03 13:53:17,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718633617] [2021-05-03 13:53:17,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:17,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:17,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:17,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:17,213 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:17,862 INFO L93 Difference]: Finished difference Result 56537 states and 127438 transitions. [2021-05-03 13:53:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 13:53:17,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:17,932 INFO L225 Difference]: With dead ends: 56537 [2021-05-03 13:53:17,932 INFO L226 Difference]: Without dead ends: 56480 [2021-05-03 13:53:17,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 535.3ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:53:17,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56480 states. [2021-05-03 13:53:18,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56480 to 55326. [2021-05-03 13:53:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55326 states, 55325 states have (on average 2.257279710799819) internal successors, (124884), 55325 states have internal predecessors, (124884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55326 states to 55326 states and 124884 transitions. [2021-05-03 13:53:18,813 INFO L78 Accepts]: Start accepts. Automaton has 55326 states and 124884 transitions. Word has length 42 [2021-05-03 13:53:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:18,813 INFO L480 AbstractCegarLoop]: Abstraction has 55326 states and 124884 transitions. [2021-05-03 13:53:18,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 55326 states and 124884 transitions. [2021-05-03 13:53:18,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:18,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:18,847 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:19,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-03 13:53:19,049 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash 442232079, now seen corresponding path program 137 times [2021-05-03 13:53:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:19,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584563210] [2021-05-03 13:53:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584563210] [2021-05-03 13:53:19,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241292642] [2021-05-03 13:53:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:19,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:53:19,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:19,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:53:19,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:19,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-05-03 13:53:19,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084795654] [2021-05-03 13:53:19,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 13:53:19,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 13:53:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-03 13:53:19,471 INFO L87 Difference]: Start difference. First operand 55326 states and 124884 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:20,320 INFO L93 Difference]: Finished difference Result 56317 states and 126979 transitions. [2021-05-03 13:53:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 13:53:20,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:20,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:20,388 INFO L225 Difference]: With dead ends: 56317 [2021-05-03 13:53:20,388 INFO L226 Difference]: Without dead ends: 56270 [2021-05-03 13:53:20,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 522.3ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:53:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56270 states. [2021-05-03 13:53:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56270 to 55585. [2021-05-03 13:53:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55585 states, 55584 states have (on average 2.257304260218768) internal successors, (125470), 55584 states have internal predecessors, (125470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:21,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55585 states to 55585 states and 125470 transitions. [2021-05-03 13:53:21,067 INFO L78 Accepts]: Start accepts. Automaton has 55585 states and 125470 transitions. Word has length 42 [2021-05-03 13:53:21,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:21,067 INFO L480 AbstractCegarLoop]: Abstraction has 55585 states and 125470 transitions. [2021-05-03 13:53:21,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:21,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55585 states and 125470 transitions. [2021-05-03 13:53:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:21,283 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:21,283 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:21,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 13:53:21,483 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1041263967, now seen corresponding path program 138 times [2021-05-03 13:53:21,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:21,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85218666] [2021-05-03 13:53:21,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:21,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85218666] [2021-05-03 13:53:21,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511052793] [2021-05-03 13:53:21,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:21,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:53:21,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:21,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:22,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:22,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-05-03 13:53:22,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864737873] [2021-05-03 13:53:22,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 13:53:22,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:22,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 13:53:22,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-05-03 13:53:22,039 INFO L87 Difference]: Start difference. First operand 55585 states and 125470 transitions. Second operand has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:23,393 INFO L93 Difference]: Finished difference Result 61301 states and 138297 transitions. [2021-05-03 13:53:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:53:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:23,493 INFO L225 Difference]: With dead ends: 61301 [2021-05-03 13:53:23,494 INFO L226 Difference]: Without dead ends: 61234 [2021-05-03 13:53:23,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 879.9ms TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:53:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61234 states. [2021-05-03 13:53:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61234 to 55915. [2021-05-03 13:53:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55915 states, 55914 states have (on average 2.256268555281325) internal successors, (126157), 55914 states have internal predecessors, (126157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55915 states to 55915 states and 126157 transitions. [2021-05-03 13:53:24,336 INFO L78 Accepts]: Start accepts. Automaton has 55915 states and 126157 transitions. Word has length 42 [2021-05-03 13:53:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:24,337 INFO L480 AbstractCegarLoop]: Abstraction has 55915 states and 126157 transitions. [2021-05-03 13:53:24,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 23 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 55915 states and 126157 transitions. [2021-05-03 13:53:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-03 13:53:24,372 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:24,372 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:24,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-03 13:53:24,573 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:24,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:24,573 INFO L82 PathProgramCache]: Analyzing trace with hash 863946971, now seen corresponding path program 139 times [2021-05-03 13:53:24,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:24,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664190918] [2021-05-03 13:53:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:24,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664190918] [2021-05-03 13:53:24,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101562116] [2021-05-03 13:53:24,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 13:53:24,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:53:25,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:25,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-05-03 13:53:25,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5951623] [2021-05-03 13:53:25,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 13:53:25,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:25,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 13:53:25,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 13:53:25,033 INFO L87 Difference]: Start difference. First operand 55915 states and 126157 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:25,627 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-05-03 13:53:25,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:25,999 INFO L93 Difference]: Finished difference Result 56362 states and 127061 transitions. [2021-05-03 13:53:26,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 13:53:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-05-03 13:53:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:26,086 INFO L225 Difference]: With dead ends: 56362 [2021-05-03 13:53:26,087 INFO L226 Difference]: Without dead ends: 56322 [2021-05-03 13:53:26,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 709.3ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:53:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56322 states. [2021-05-03 13:53:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56322 to 56135. [2021-05-03 13:53:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56135 states, 56134 states have (on average 2.256546834360637) internal successors, (126669), 56134 states have internal predecessors, (126669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56135 states to 56135 states and 126669 transitions. [2021-05-03 13:53:27,011 INFO L78 Accepts]: Start accepts. Automaton has 56135 states and 126669 transitions. Word has length 42 [2021-05-03 13:53:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:27,011 INFO L480 AbstractCegarLoop]: Abstraction has 56135 states and 126669 transitions. [2021-05-03 13:53:27,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 56135 states and 126669 transitions. [2021-05-03 13:53:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 13:53:27,042 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:27,042 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:27,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:27,243 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:27,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash -395845787, now seen corresponding path program 8 times [2021-05-03 13:53:27,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:27,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536762514] [2021-05-03 13:53:27,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:27,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536762514] [2021-05-03 13:53:27,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178442471] [2021-05-03 13:53:27,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:27,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:27,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 13:53:27,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:27,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:27,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-03 13:53:27,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504632610] [2021-05-03 13:53:27,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 13:53:27,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 13:53:27,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-03 13:53:27,416 INFO L87 Difference]: Start difference. First operand 56135 states and 126669 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:27,792 INFO L93 Difference]: Finished difference Result 59240 states and 132696 transitions. [2021-05-03 13:53:27,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 13:53:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-03 13:53:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:27,873 INFO L225 Difference]: With dead ends: 59240 [2021-05-03 13:53:27,873 INFO L226 Difference]: Without dead ends: 59240 [2021-05-03 13:53:27,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2021-05-03 13:53:27,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59240 states. [2021-05-03 13:53:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59240 to 56220. [2021-05-03 13:53:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56220 states, 56219 states have (on average 2.256176737401946) internal successors, (126840), 56219 states have internal predecessors, (126840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56220 states to 56220 states and 126840 transitions. [2021-05-03 13:53:28,742 INFO L78 Accepts]: Start accepts. Automaton has 56220 states and 126840 transitions. Word has length 43 [2021-05-03 13:53:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:28,742 INFO L480 AbstractCegarLoop]: Abstraction has 56220 states and 126840 transitions. [2021-05-03 13:53:28,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 56220 states and 126840 transitions. [2021-05-03 13:53:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:28,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:28,782 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:28,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:28,982 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash 624773514, now seen corresponding path program 140 times [2021-05-03 13:53:28,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:28,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593562735] [2021-05-03 13:53:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:29,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593562735] [2021-05-03 13:53:29,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012457368] [2021-05-03 13:53:29,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:29,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:29,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:29,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:53:29,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878772946] [2021-05-03 13:53:29,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:53:29,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:29,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:53:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:53:29,744 INFO L87 Difference]: Start difference. First operand 56220 states and 126840 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:31,156 INFO L93 Difference]: Finished difference Result 57581 states and 129835 transitions. [2021-05-03 13:53:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:53:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:31,246 INFO L225 Difference]: With dead ends: 57581 [2021-05-03 13:53:31,246 INFO L226 Difference]: Without dead ends: 57564 [2021-05-03 13:53:31,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 922.7ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 13:53:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57564 states. [2021-05-03 13:53:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57564 to 57088. [2021-05-03 13:53:32,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 2.2573440538126017) internal successors, (128865), 57087 states have internal predecessors, (128865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 128865 transitions. [2021-05-03 13:53:32,178 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 128865 transitions. Word has length 44 [2021-05-03 13:53:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:32,178 INFO L480 AbstractCegarLoop]: Abstraction has 57088 states and 128865 transitions. [2021-05-03 13:53:32,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 128865 transitions. [2021-05-03 13:53:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:32,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:32,219 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:32,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:32,420 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1201506898, now seen corresponding path program 141 times [2021-05-03 13:53:32,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:32,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030354426] [2021-05-03 13:53:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:32,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030354426] [2021-05-03 13:53:32,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634652716] [2021-05-03 13:53:32,665 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:32,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 13:53:32,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:32,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:33,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:33,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:53:33,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221682403] [2021-05-03 13:53:33,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:53:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:33,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:53:33,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:53:33,178 INFO L87 Difference]: Start difference. First operand 57088 states and 128865 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:36,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:36,065 INFO L93 Difference]: Finished difference Result 64602 states and 145282 transitions. [2021-05-03 13:53:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:53:36,066 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:36,165 INFO L225 Difference]: With dead ends: 64602 [2021-05-03 13:53:36,165 INFO L226 Difference]: Without dead ends: 64568 [2021-05-03 13:53:36,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1130.7ms TimeCoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 13:53:36,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64568 states. [2021-05-03 13:53:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64568 to 60075. [2021-05-03 13:53:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60075 states, 60074 states have (on average 2.265805506541932) internal successors, (136116), 60074 states have internal predecessors, (136116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60075 states to 60075 states and 136116 transitions. [2021-05-03 13:53:37,122 INFO L78 Accepts]: Start accepts. Automaton has 60075 states and 136116 transitions. Word has length 44 [2021-05-03 13:53:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:37,122 INFO L480 AbstractCegarLoop]: Abstraction has 60075 states and 136116 transitions. [2021-05-03 13:53:37,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 60075 states and 136116 transitions. [2021-05-03 13:53:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:37,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:37,164 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:37,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:37,364 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:37,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1948613002, now seen corresponding path program 142 times [2021-05-03 13:53:37,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:37,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76892494] [2021-05-03 13:53:37,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:37,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76892494] [2021-05-03 13:53:37,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513571168] [2021-05-03 13:53:37,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:37,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:53:37,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:37,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:38,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:38,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:53:38,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965907760] [2021-05-03 13:53:38,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:53:38,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:53:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:53:38,114 INFO L87 Difference]: Start difference. First operand 60075 states and 136116 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:39,802 INFO L93 Difference]: Finished difference Result 61117 states and 138361 transitions. [2021-05-03 13:53:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:53:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:39,880 INFO L225 Difference]: With dead ends: 61117 [2021-05-03 13:53:39,880 INFO L226 Difference]: Without dead ends: 61100 [2021-05-03 13:53:39,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1031.5ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:53:39,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61100 states. [2021-05-03 13:53:40,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61100 to 60610. [2021-05-03 13:53:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60609 states have (on average 2.26736953257767) internal successors, (137423), 60609 states have internal predecessors, (137423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 137423 transitions. [2021-05-03 13:53:40,881 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 137423 transitions. Word has length 44 [2021-05-03 13:53:40,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:40,881 INFO L480 AbstractCegarLoop]: Abstraction has 60610 states and 137423 transitions. [2021-05-03 13:53:40,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:40,882 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 137423 transitions. [2021-05-03 13:53:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:40,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:40,924 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:41,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:41,125 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1247898286, now seen corresponding path program 143 times [2021-05-03 13:53:41,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:41,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055229758] [2021-05-03 13:53:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:41,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055229758] [2021-05-03 13:53:41,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090452416] [2021-05-03 13:53:41,392 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:41,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:53:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:42,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:42,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-03 13:53:42,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676586799] [2021-05-03 13:53:42,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 13:53:42,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:42,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 13:53:42,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:53:42,048 INFO L87 Difference]: Start difference. First operand 60610 states and 137423 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:44,260 INFO L93 Difference]: Finished difference Result 62141 states and 140673 transitions. [2021-05-03 13:53:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 13:53:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:44,349 INFO L225 Difference]: With dead ends: 62141 [2021-05-03 13:53:44,349 INFO L226 Difference]: Without dead ends: 62124 [2021-05-03 13:53:44,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1420.5ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:53:44,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62124 states. [2021-05-03 13:53:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62124 to 61220. [2021-05-03 13:53:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61220 states, 61219 states have (on average 2.269083127787125) internal successors, (138911), 61219 states have internal predecessors, (138911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61220 states to 61220 states and 138911 transitions. [2021-05-03 13:53:45,406 INFO L78 Accepts]: Start accepts. Automaton has 61220 states and 138911 transitions. Word has length 44 [2021-05-03 13:53:45,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:45,406 INFO L480 AbstractCegarLoop]: Abstraction has 61220 states and 138911 transitions. [2021-05-03 13:53:45,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 61220 states and 138911 transitions. [2021-05-03 13:53:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:45,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:45,449 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:45,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:45,649 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash 632835722, now seen corresponding path program 144 times [2021-05-03 13:53:45,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:45,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716357567] [2021-05-03 13:53:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:45,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716357567] [2021-05-03 13:53:45,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080871266] [2021-05-03 13:53:45,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:45,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:53:45,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:45,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:46,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:46,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-03 13:53:46,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705731153] [2021-05-03 13:53:46,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 13:53:46,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:46,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 13:53:46,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:53:46,710 INFO L87 Difference]: Start difference. First operand 61220 states and 138911 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:49,255 INFO L93 Difference]: Finished difference Result 67577 states and 152697 transitions. [2021-05-03 13:53:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:53:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:49,357 INFO L225 Difference]: With dead ends: 67577 [2021-05-03 13:53:49,357 INFO L226 Difference]: Without dead ends: 67543 [2021-05-03 13:53:49,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1801.8ms TimeCoverageRelationStatistics Valid=223, Invalid=2747, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 13:53:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67543 states. [2021-05-03 13:53:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67543 to 63075. [2021-05-03 13:53:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63075 states, 63074 states have (on average 2.2736151187494054) internal successors, (143406), 63074 states have internal predecessors, (143406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63075 states to 63075 states and 143406 transitions. [2021-05-03 13:53:50,378 INFO L78 Accepts]: Start accepts. Automaton has 63075 states and 143406 transitions. Word has length 44 [2021-05-03 13:53:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:50,378 INFO L480 AbstractCegarLoop]: Abstraction has 63075 states and 143406 transitions. [2021-05-03 13:53:50,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 63075 states and 143406 transitions. [2021-05-03 13:53:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:50,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:50,423 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:50,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:50,624 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:50,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:50,624 INFO L82 PathProgramCache]: Analyzing trace with hash 592118866, now seen corresponding path program 145 times [2021-05-03 13:53:50,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:50,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244912771] [2021-05-03 13:53:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244912771] [2021-05-03 13:53:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382248315] [2021-05-03 13:53:50,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:51,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:51,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:53:51,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725370190] [2021-05-03 13:53:51,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:53:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:53:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:53:51,413 INFO L87 Difference]: Start difference. First operand 63075 states and 143406 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:52,791 INFO L93 Difference]: Finished difference Result 64664 states and 146868 transitions. [2021-05-03 13:53:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:53:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:52,887 INFO L225 Difference]: With dead ends: 64664 [2021-05-03 13:53:52,887 INFO L226 Difference]: Without dead ends: 64630 [2021-05-03 13:53:52,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 982.1ms TimeCoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:53:53,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-05-03 13:53:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 64028. [2021-05-03 13:53:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64028 states, 64027 states have (on average 2.2752901119840065) internal successors, (145680), 64027 states have internal predecessors, (145680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64028 states to 64028 states and 145680 transitions. [2021-05-03 13:53:54,153 INFO L78 Accepts]: Start accepts. Automaton has 64028 states and 145680 transitions. Word has length 44 [2021-05-03 13:53:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:54,153 INFO L480 AbstractCegarLoop]: Abstraction has 64028 states and 145680 transitions. [2021-05-03 13:53:54,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 64028 states and 145680 transitions. [2021-05-03 13:53:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:54,191 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:54,191 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:54,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 13:53:54,392 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash 994599818, now seen corresponding path program 146 times [2021-05-03 13:53:54,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:54,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118063588] [2021-05-03 13:53:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:54,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118063588] [2021-05-03 13:53:54,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359440962] [2021-05-03 13:53:54,685 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:54,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:53:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:54,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:54,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:55,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:55,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:53:55,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295072324] [2021-05-03 13:53:55,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:53:55,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:53:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:53:55,330 INFO L87 Difference]: Start difference. First operand 64028 states and 145680 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:56,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:53:56,783 INFO L93 Difference]: Finished difference Result 65329 states and 148442 transitions. [2021-05-03 13:53:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:53:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:53:56,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:53:56,879 INFO L225 Difference]: With dead ends: 65329 [2021-05-03 13:53:56,879 INFO L226 Difference]: Without dead ends: 65295 [2021-05-03 13:53:56,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1054.3ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:53:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65295 states. [2021-05-03 13:53:57,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65295 to 64699. [2021-05-03 13:53:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64699 states, 64698 states have (on average 2.276160004946057) internal successors, (147263), 64698 states have internal predecessors, (147263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64699 states to 64699 states and 147263 transitions. [2021-05-03 13:53:57,896 INFO L78 Accepts]: Start accepts. Automaton has 64699 states and 147263 transitions. Word has length 44 [2021-05-03 13:53:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:53:57,897 INFO L480 AbstractCegarLoop]: Abstraction has 64699 states and 147263 transitions. [2021-05-03 13:53:57,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:53:57,897 INFO L276 IsEmpty]: Start isEmpty. Operand 64699 states and 147263 transitions. [2021-05-03 13:53:57,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:53:57,938 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:53:57,938 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:53:58,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:58,139 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:53:58,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:53:58,139 INFO L82 PathProgramCache]: Analyzing trace with hash 314707794, now seen corresponding path program 147 times [2021-05-03 13:53:58,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:53:58,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053228011] [2021-05-03 13:53:58,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:53:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:53:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:53:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053228011] [2021-05-03 13:53:58,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529497460] [2021-05-03 13:53:58,362 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:53:58,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 13:53:58,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:53:58,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:53:58,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:53:58,540 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-05-03 13:53:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:53:59,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:53:59,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:53:59,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965992942] [2021-05-03 13:53:59,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:53:59,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:53:59,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:53:59,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:53:59,135 INFO L87 Difference]: Start difference. First operand 64699 states and 147263 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:01,335 INFO L93 Difference]: Finished difference Result 75604 states and 171475 transitions. [2021-05-03 13:54:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 13:54:01,336 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:01,447 INFO L225 Difference]: With dead ends: 75604 [2021-05-03 13:54:01,448 INFO L226 Difference]: Without dead ends: 75535 [2021-05-03 13:54:01,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 1294.2ms TimeCoverageRelationStatistics Valid=167, Invalid=2089, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 13:54:01,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75535 states. [2021-05-03 13:54:02,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75535 to 69950. [2021-05-03 13:54:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69950 states, 69949 states have (on average 2.2841355844972764) internal successors, (159773), 69949 states have internal predecessors, (159773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69950 states to 69950 states and 159773 transitions. [2021-05-03 13:54:02,601 INFO L78 Accepts]: Start accepts. Automaton has 69950 states and 159773 transitions. Word has length 44 [2021-05-03 13:54:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:02,601 INFO L480 AbstractCegarLoop]: Abstraction has 69950 states and 159773 transitions. [2021-05-03 13:54:02,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand 69950 states and 159773 transitions. [2021-05-03 13:54:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:02,775 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:02,775 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:02,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 13:54:02,976 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1595616440, now seen corresponding path program 148 times [2021-05-03 13:54:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:02,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541884583] [2021-05-03 13:54:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:03,236 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:03,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541884583] [2021-05-03 13:54:03,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923136592] [2021-05-03 13:54:03,237 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:03,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:03,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:03,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:54:03,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333823308] [2021-05-03 13:54:03,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:54:03,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:03,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:54:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:03,777 INFO L87 Difference]: Start difference. First operand 69950 states and 159773 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:05,540 INFO L93 Difference]: Finished difference Result 70952 states and 161947 transitions. [2021-05-03 13:54:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:54:05,541 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:05,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:05,650 INFO L225 Difference]: With dead ends: 70952 [2021-05-03 13:54:05,650 INFO L226 Difference]: Without dead ends: 70935 [2021-05-03 13:54:05,651 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1102.9ms TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:54:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70935 states. [2021-05-03 13:54:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70935 to 70483. [2021-05-03 13:54:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70483 states, 70482 states have (on average 2.285392014982549) internal successors, (161079), 70482 states have internal predecessors, (161079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70483 states to 70483 states and 161079 transitions. [2021-05-03 13:54:06,753 INFO L78 Accepts]: Start accepts. Automaton has 70483 states and 161079 transitions. Word has length 44 [2021-05-03 13:54:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:06,753 INFO L480 AbstractCegarLoop]: Abstraction has 70483 states and 161079 transitions. [2021-05-03 13:54:06,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 70483 states and 161079 transitions. [2021-05-03 13:54:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:06,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:06,805 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:07,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:07,005 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash -839131036, now seen corresponding path program 149 times [2021-05-03 13:54:07,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:07,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26466499] [2021-05-03 13:54:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26466499] [2021-05-03 13:54:07,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714597678] [2021-05-03 13:54:07,416 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:07,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 13:54:07,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:07,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:08,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:08,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-03 13:54:08,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098221045] [2021-05-03 13:54:08,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 13:54:08,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 13:54:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:54:08,228 INFO L87 Difference]: Start difference. First operand 70483 states and 161079 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:10,287 INFO L93 Difference]: Finished difference Result 71720 states and 163724 transitions. [2021-05-03 13:54:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:54:10,289 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:10,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:10,394 INFO L225 Difference]: With dead ends: 71720 [2021-05-03 13:54:10,394 INFO L226 Difference]: Without dead ends: 71703 [2021-05-03 13:54:10,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1579.9ms TimeCoverageRelationStatistics Valid=183, Invalid=2169, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:54:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71703 states. [2021-05-03 13:54:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71703 to 71032. [2021-05-03 13:54:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71032 states, 71031 states have (on average 2.2866494910672803) internal successors, (162423), 71031 states have internal predecessors, (162423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71032 states to 71032 states and 162423 transitions. [2021-05-03 13:54:11,631 INFO L78 Accepts]: Start accepts. Automaton has 71032 states and 162423 transitions. Word has length 44 [2021-05-03 13:54:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:11,631 INFO L480 AbstractCegarLoop]: Abstraction has 71032 states and 162423 transitions. [2021-05-03 13:54:11,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 71032 states and 162423 transitions. [2021-05-03 13:54:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:11,671 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:11,671 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:11,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-05-03 13:54:11,871 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2116521804, now seen corresponding path program 150 times [2021-05-03 13:54:11,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:11,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400329212] [2021-05-03 13:54:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400329212] [2021-05-03 13:54:12,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680669367] [2021-05-03 13:54:12,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:12,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 13:54:12,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:12,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:12,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:12,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:54:12,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351931689] [2021-05-03 13:54:12,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:54:12,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:12,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:54:12,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:54:12,736 INFO L87 Difference]: Start difference. First operand 71032 states and 162423 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:15,675 INFO L93 Difference]: Finished difference Result 79207 states and 180098 transitions. [2021-05-03 13:54:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 13:54:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:15,787 INFO L225 Difference]: With dead ends: 79207 [2021-05-03 13:54:15,787 INFO L226 Difference]: Without dead ends: 79173 [2021-05-03 13:54:15,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1398.4ms TimeCoverageRelationStatistics Valid=167, Invalid=2185, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:54:15,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79173 states. [2021-05-03 13:54:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79173 to 73877. [2021-05-03 13:54:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73877 states, 73876 states have (on average 2.292016351724511) internal successors, (169325), 73876 states have internal predecessors, (169325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73877 states to 73877 states and 169325 transitions. [2021-05-03 13:54:16,938 INFO L78 Accepts]: Start accepts. Automaton has 73877 states and 169325 transitions. Word has length 44 [2021-05-03 13:54:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:16,938 INFO L480 AbstractCegarLoop]: Abstraction has 73877 states and 169325 transitions. [2021-05-03 13:54:16,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 73877 states and 169325 transitions. [2021-05-03 13:54:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:16,979 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:16,979 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:17,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:17,180 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:17,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1018065796, now seen corresponding path program 151 times [2021-05-03 13:54:17,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:17,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471672687] [2021-05-03 13:54:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:17,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471672687] [2021-05-03 13:54:17,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995879536] [2021-05-03 13:54:17,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:17,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:18,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:18,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:54:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960350985] [2021-05-03 13:54:18,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:54:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:54:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:18,114 INFO L87 Difference]: Start difference. First operand 73877 states and 169325 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:19,988 INFO L93 Difference]: Finished difference Result 74738 states and 171189 transitions. [2021-05-03 13:54:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:54:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:20,101 INFO L225 Difference]: With dead ends: 74738 [2021-05-03 13:54:20,101 INFO L226 Difference]: Without dead ends: 74721 [2021-05-03 13:54:20,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1292.3ms TimeCoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:54:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74721 states. [2021-05-03 13:54:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74721 to 74366. [2021-05-03 13:54:21,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74366 states, 74365 states have (on average 2.2927990318025953) internal successors, (170504), 74365 states have internal predecessors, (170504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:21,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74366 states to 74366 states and 170504 transitions. [2021-05-03 13:54:21,258 INFO L78 Accepts]: Start accepts. Automaton has 74366 states and 170504 transitions. Word has length 44 [2021-05-03 13:54:21,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:21,258 INFO L480 AbstractCegarLoop]: Abstraction has 74366 states and 170504 transitions. [2021-05-03 13:54:21,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 74366 states and 170504 transitions. [2021-05-03 13:54:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:21,311 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:21,311 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:21,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:21,511 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:21,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash 862668212, now seen corresponding path program 152 times [2021-05-03 13:54:21,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:21,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498939462] [2021-05-03 13:54:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:21,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498939462] [2021-05-03 13:54:21,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544283133] [2021-05-03 13:54:21,864 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:21,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:21,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:21,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:21,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:22,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:22,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:54:22,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095394785] [2021-05-03 13:54:22,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:54:22,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:22,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:54:22,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:22,276 INFO L87 Difference]: Start difference. First operand 74366 states and 170504 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:24,214 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 13:54:24,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:24,689 INFO L93 Difference]: Finished difference Result 78636 states and 179826 transitions. [2021-05-03 13:54:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 13:54:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:24,808 INFO L225 Difference]: With dead ends: 78636 [2021-05-03 13:54:24,808 INFO L226 Difference]: Without dead ends: 78602 [2021-05-03 13:54:24,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1591.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 13:54:24,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78602 states. [2021-05-03 13:54:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78602 to 75625. [2021-05-03 13:54:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75625 states, 75624 states have (on average 2.2950782820268696) internal successors, (173563), 75624 states have internal predecessors, (173563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75625 states to 75625 states and 173563 transitions. [2021-05-03 13:54:25,988 INFO L78 Accepts]: Start accepts. Automaton has 75625 states and 173563 transitions. Word has length 44 [2021-05-03 13:54:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:25,988 INFO L480 AbstractCegarLoop]: Abstraction has 75625 states and 173563 transitions. [2021-05-03 13:54:25,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 75625 states and 173563 transitions. [2021-05-03 13:54:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:26,035 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:26,035 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:26,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:26,235 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:26,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:26,235 INFO L82 PathProgramCache]: Analyzing trace with hash 821951356, now seen corresponding path program 153 times [2021-05-03 13:54:26,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:26,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248736190] [2021-05-03 13:54:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:26,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248736190] [2021-05-03 13:54:26,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440361280] [2021-05-03 13:54:26,562 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:26,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:54:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:26,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:27,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:27,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:54:27,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855614414] [2021-05-03 13:54:27,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:54:27,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:27,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:54:27,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=859, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:54:27,108 INFO L87 Difference]: Start difference. First operand 75625 states and 173563 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:30,528 INFO L93 Difference]: Finished difference Result 84081 states and 191944 transitions. [2021-05-03 13:54:30,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:54:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:30,633 INFO L225 Difference]: With dead ends: 84081 [2021-05-03 13:54:30,633 INFO L226 Difference]: Without dead ends: 84034 [2021-05-03 13:54:30,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1650.1ms TimeCoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:54:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84034 states. [2021-05-03 13:54:31,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84034 to 78487. [2021-05-03 13:54:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78487 states, 78486 states have (on average 2.2985245776316794) internal successors, (180402), 78486 states have internal predecessors, (180402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78487 states to 78487 states and 180402 transitions. [2021-05-03 13:54:31,857 INFO L78 Accepts]: Start accepts. Automaton has 78487 states and 180402 transitions. Word has length 44 [2021-05-03 13:54:31,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:31,857 INFO L480 AbstractCegarLoop]: Abstraction has 78487 states and 180402 transitions. [2021-05-03 13:54:31,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 78487 states and 180402 transitions. [2021-05-03 13:54:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:32,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:32,077 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:32,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:32,285 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1224432308, now seen corresponding path program 154 times [2021-05-03 13:54:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:32,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560056953] [2021-05-03 13:54:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:32,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560056953] [2021-05-03 13:54:32,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52480375] [2021-05-03 13:54:32,670 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:32,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:54:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:33,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:33,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:54:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668508789] [2021-05-03 13:54:33,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:54:33,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:54:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:54:33,379 INFO L87 Difference]: Start difference. First operand 78487 states and 180402 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:34,997 INFO L93 Difference]: Finished difference Result 79146 states and 181810 transitions. [2021-05-03 13:54:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:54:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:35,128 INFO L225 Difference]: With dead ends: 79146 [2021-05-03 13:54:35,128 INFO L226 Difference]: Without dead ends: 79112 [2021-05-03 13:54:35,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1277.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1423, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 13:54:35,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79112 states. [2021-05-03 13:54:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79112 to 79027. [2021-05-03 13:54:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79027 states, 79026 states have (on average 2.2979146103813934) internal successors, (181595), 79026 states have internal predecessors, (181595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:36,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79027 states to 79027 states and 181595 transitions. [2021-05-03 13:54:36,533 INFO L78 Accepts]: Start accepts. Automaton has 79027 states and 181595 transitions. Word has length 44 [2021-05-03 13:54:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:36,533 INFO L480 AbstractCegarLoop]: Abstraction has 79027 states and 181595 transitions. [2021-05-03 13:54:36,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:36,533 INFO L276 IsEmpty]: Start isEmpty. Operand 79027 states and 181595 transitions. [2021-05-03 13:54:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:36,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:36,583 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:36,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-05-03 13:54:36,786 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -722916894, now seen corresponding path program 155 times [2021-05-03 13:54:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:36,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761880630] [2021-05-03 13:54:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:37,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761880630] [2021-05-03 13:54:37,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374289973] [2021-05-03 13:54:37,131 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:37,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:54:37,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:37,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:54:37,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:37,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:54:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925162204] [2021-05-03 13:54:37,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:54:37,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:54:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:54:37,755 INFO L87 Difference]: Start difference. First operand 79027 states and 181595 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:39,673 INFO L93 Difference]: Finished difference Result 87645 states and 201012 transitions. [2021-05-03 13:54:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:54:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:39,812 INFO L225 Difference]: With dead ends: 87645 [2021-05-03 13:54:39,812 INFO L226 Difference]: Without dead ends: 87602 [2021-05-03 13:54:39,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1267.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:54:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87602 states. [2021-05-03 13:54:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87602 to 84874. [2021-05-03 13:54:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 2.3016742662566423) internal successors, (195350), 84873 states have internal predecessors, (195350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:41,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 195350 transitions. [2021-05-03 13:54:41,264 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 195350 transitions. Word has length 44 [2021-05-03 13:54:41,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:41,265 INFO L480 AbstractCegarLoop]: Abstraction has 84874 states and 195350 transitions. [2021-05-03 13:54:41,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:41,265 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 195350 transitions. [2021-05-03 13:54:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:41,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:41,312 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:41,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 13:54:41,513 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1402578930, now seen corresponding path program 156 times [2021-05-03 13:54:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:41,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899908637] [2021-05-03 13:54:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:41,889 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:41,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899908637] [2021-05-03 13:54:41,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936691140] [2021-05-03 13:54:41,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:41,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:54:41,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:42,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:42,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:54:42,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264683915] [2021-05-03 13:54:42,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:54:42,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:54:42,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:42,351 INFO L87 Difference]: Start difference. First operand 84874 states and 195350 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:44,759 INFO L93 Difference]: Finished difference Result 87816 states and 201709 transitions. [2021-05-03 13:54:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:54:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:44,898 INFO L225 Difference]: With dead ends: 87816 [2021-05-03 13:54:44,898 INFO L226 Difference]: Without dead ends: 87799 [2021-05-03 13:54:44,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1407.4ms TimeCoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 13:54:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87799 states. [2021-05-03 13:54:45,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87799 to 85630. [2021-05-03 13:54:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85630 states, 85629 states have (on average 2.3027479008279905) internal successors, (197182), 85629 states have internal predecessors, (197182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85630 states to 85630 states and 197182 transitions. [2021-05-03 13:54:46,247 INFO L78 Accepts]: Start accepts. Automaton has 85630 states and 197182 transitions. Word has length 44 [2021-05-03 13:54:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:46,247 INFO L480 AbstractCegarLoop]: Abstraction has 85630 states and 197182 transitions. [2021-05-03 13:54:46,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 85630 states and 197182 transitions. [2021-05-03 13:54:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:46,304 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:46,304 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:46,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:46,505 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1044575176, now seen corresponding path program 157 times [2021-05-03 13:54:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:46,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086780525] [2021-05-03 13:54:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086780525] [2021-05-03 13:54:46,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039143352] [2021-05-03 13:54:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:46,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:46,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:47,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:47,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:54:47,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245007485] [2021-05-03 13:54:47,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:54:47,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:47,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:54:47,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:47,293 INFO L87 Difference]: Start difference. First operand 85630 states and 197182 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:49,397 INFO L93 Difference]: Finished difference Result 86430 states and 198919 transitions. [2021-05-03 13:54:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:54:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:49,528 INFO L225 Difference]: With dead ends: 86430 [2021-05-03 13:54:49,528 INFO L226 Difference]: Without dead ends: 86413 [2021-05-03 13:54:49,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1398.8ms TimeCoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:54:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86413 states. [2021-05-03 13:54:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86413 to 86134. [2021-05-03 13:54:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86134 states, 86133 states have (on average 2.303333217233813) internal successors, (198393), 86133 states have internal predecessors, (198393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86134 states to 86134 states and 198393 transitions. [2021-05-03 13:54:50,832 INFO L78 Accepts]: Start accepts. Automaton has 86134 states and 198393 transitions. Word has length 44 [2021-05-03 13:54:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:50,832 INFO L480 AbstractCegarLoop]: Abstraction has 86134 states and 198393 transitions. [2021-05-03 13:54:50,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 86134 states and 198393 transitions. [2021-05-03 13:54:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:50,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:50,883 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:51,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 13:54:51,083 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1825448930, now seen corresponding path program 158 times [2021-05-03 13:54:51,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124325291] [2021-05-03 13:54:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124325291] [2021-05-03 13:54:51,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578338621] [2021-05-03 13:54:51,356 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:51,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:54:51,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:52,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:52,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:54:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269128083] [2021-05-03 13:54:52,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:54:52,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:54:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:54:52,245 INFO L87 Difference]: Start difference. First operand 86134 states and 198393 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:54:53,908 INFO L93 Difference]: Finished difference Result 86926 states and 200105 transitions. [2021-05-03 13:54:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:54:53,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:54:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:54:54,036 INFO L225 Difference]: With dead ends: 86926 [2021-05-03 13:54:54,036 INFO L226 Difference]: Without dead ends: 86909 [2021-05-03 13:54:54,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1225.6ms TimeCoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:54:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86909 states. [2021-05-03 13:54:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86909 to 86615. [2021-05-03 13:54:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86615 states, 86614 states have (on average 2.3039000623455794) internal successors, (199550), 86614 states have internal predecessors, (199550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86615 states to 86615 states and 199550 transitions. [2021-05-03 13:54:55,588 INFO L78 Accepts]: Start accepts. Automaton has 86615 states and 199550 transitions. Word has length 44 [2021-05-03 13:54:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:54:55,588 INFO L480 AbstractCegarLoop]: Abstraction has 86615 states and 199550 transitions. [2021-05-03 13:54:55,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:54:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 86615 states and 199550 transitions. [2021-05-03 13:54:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:54:55,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:54:55,636 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:54:55,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-03 13:54:55,837 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:54:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:54:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash 144907922, now seen corresponding path program 159 times [2021-05-03 13:54:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:54:55,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589134384] [2021-05-03 13:54:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:54:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:54:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:54:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589134384] [2021-05-03 13:54:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451321998] [2021-05-03 13:54:56,123 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:54:56,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 13:54:56,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:54:56,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:54:56,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:54:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:54:56,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:54:56,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-03 13:54:56,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966346156] [2021-05-03 13:54:56,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 13:54:56,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:54:56,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 13:54:56,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:54:56,958 INFO L87 Difference]: Start difference. First operand 86615 states and 199550 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:00,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:00,268 INFO L93 Difference]: Finished difference Result 91083 states and 209196 transitions. [2021-05-03 13:55:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 13:55:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:00,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:00,398 INFO L225 Difference]: With dead ends: 91083 [2021-05-03 13:55:00,398 INFO L226 Difference]: Without dead ends: 91049 [2021-05-03 13:55:00,398 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 1972.2ms TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2021-05-03 13:55:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91049 states. [2021-05-03 13:55:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91049 to 87931. [2021-05-03 13:55:01,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87931 states, 87930 states have (on average 2.305606732628227) internal successors, (202732), 87930 states have internal predecessors, (202732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:01,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 202732 transitions. [2021-05-03 13:55:01,667 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 202732 transitions. Word has length 44 [2021-05-03 13:55:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:01,667 INFO L480 AbstractCegarLoop]: Abstraction has 87931 states and 202732 transitions. [2021-05-03 13:55:01,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:01,667 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 202732 transitions. [2021-05-03 13:55:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:01,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:01,724 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:01,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-05-03 13:55:01,937 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:01,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1243363930, now seen corresponding path program 160 times [2021-05-03 13:55:01,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:01,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764607465] [2021-05-03 13:55:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:02,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764607465] [2021-05-03 13:55:02,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30217840] [2021-05-03 13:55:02,373 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:02,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:02,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:03,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:03,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:55:03,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106216311] [2021-05-03 13:55:03,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:55:03,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:03,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:55:03,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:55:03,039 INFO L87 Difference]: Start difference. First operand 87931 states and 202732 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:05,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:05,200 INFO L93 Difference]: Finished difference Result 88810 states and 204621 transitions. [2021-05-03 13:55:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:55:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:05,355 INFO L225 Difference]: With dead ends: 88810 [2021-05-03 13:55:05,355 INFO L226 Difference]: Without dead ends: 88793 [2021-05-03 13:55:05,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1407.7ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:55:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88793 states. [2021-05-03 13:55:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88793 to 88408. [2021-05-03 13:55:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88408 states, 88407 states have (on average 2.3060843598357597) internal successors, (203874), 88407 states have internal predecessors, (203874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88408 states to 88408 states and 203874 transitions. [2021-05-03 13:55:06,923 INFO L78 Accepts]: Start accepts. Automaton has 88408 states and 203874 transitions. Word has length 44 [2021-05-03 13:55:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:06,923 INFO L480 AbstractCegarLoop]: Abstraction has 88408 states and 203874 transitions. [2021-05-03 13:55:06,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 88408 states and 203874 transitions. [2021-05-03 13:55:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:06,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:06,974 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:07,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:07,188 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1170869358, now seen corresponding path program 161 times [2021-05-03 13:55:07,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:07,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014533996] [2021-05-03 13:55:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014533996] [2021-05-03 13:55:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235588238] [2021-05-03 13:55:07,604 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:07,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:55:07,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:07,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:07,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:08,740 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:08,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:08,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-03 13:55:08,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237771063] [2021-05-03 13:55:08,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 13:55:08,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:08,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 13:55:08,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:55:08,742 INFO L87 Difference]: Start difference. First operand 88408 states and 203874 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:12,988 INFO L93 Difference]: Finished difference Result 94594 states and 217166 transitions. [2021-05-03 13:55:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 13:55:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:13,113 INFO L225 Difference]: With dead ends: 94594 [2021-05-03 13:55:13,113 INFO L226 Difference]: Without dead ends: 94560 [2021-05-03 13:55:13,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2424.9ms TimeCoverageRelationStatistics Valid=244, Invalid=3178, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 13:55:13,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94560 states. [2021-05-03 13:55:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94560 to 89603. [2021-05-03 13:55:14,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89603 states, 89602 states have (on average 2.307281087475726) internal successors, (206737), 89602 states have internal predecessors, (206737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:14,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89603 states to 89603 states and 206737 transitions. [2021-05-03 13:55:14,466 INFO L78 Accepts]: Start accepts. Automaton has 89603 states and 206737 transitions. Word has length 44 [2021-05-03 13:55:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:14,467 INFO L480 AbstractCegarLoop]: Abstraction has 89603 states and 206737 transitions. [2021-05-03 13:55:14,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 89603 states and 206737 transitions. [2021-05-03 13:55:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:14,524 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:14,524 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:14,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-03 13:55:14,740 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:14,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:14,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1211586214, now seen corresponding path program 162 times [2021-05-03 13:55:14,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:14,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338031138] [2021-05-03 13:55:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:15,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338031138] [2021-05-03 13:55:15,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141552892] [2021-05-03 13:55:15,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:15,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:55:15,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:15,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:16,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:16,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-03 13:55:16,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117023292] [2021-05-03 13:55:16,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 13:55:16,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 13:55:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:55:16,106 INFO L87 Difference]: Start difference. First operand 89603 states and 206737 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:20,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:20,545 INFO L93 Difference]: Finished difference Result 95030 states and 218324 transitions. [2021-05-03 13:55:20,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 13:55:20,546 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:20,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:20,697 INFO L225 Difference]: With dead ends: 95030 [2021-05-03 13:55:20,697 INFO L226 Difference]: Without dead ends: 94996 [2021-05-03 13:55:20,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2801.9ms TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 13:55:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94996 states. [2021-05-03 13:55:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94996 to 90812. [2021-05-03 13:55:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90812 states, 90811 states have (on average 2.308002334518946) internal successors, (209592), 90811 states have internal predecessors, (209592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90812 states to 90812 states and 209592 transitions. [2021-05-03 13:55:22,390 INFO L78 Accepts]: Start accepts. Automaton has 90812 states and 209592 transitions. Word has length 44 [2021-05-03 13:55:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:22,390 INFO L480 AbstractCegarLoop]: Abstraction has 90812 states and 209592 transitions. [2021-05-03 13:55:22,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 90812 states and 209592 transitions. [2021-05-03 13:55:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:22,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:22,448 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:22,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:22,663 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:22,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:22,663 INFO L82 PathProgramCache]: Analyzing trace with hash -809105262, now seen corresponding path program 163 times [2021-05-03 13:55:22,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:22,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262210358] [2021-05-03 13:55:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:23,064 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:23,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262210358] [2021-05-03 13:55:23,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248866700] [2021-05-03 13:55:23,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:23,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:23,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:23,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:23,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:55:23,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495542894] [2021-05-03 13:55:23,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:55:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:55:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:55:23,661 INFO L87 Difference]: Start difference. First operand 90812 states and 209592 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:26,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:26,279 INFO L93 Difference]: Finished difference Result 91387 states and 210800 transitions. [2021-05-03 13:55:26,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:55:26,280 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:26,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:26,415 INFO L225 Difference]: With dead ends: 91387 [2021-05-03 13:55:26,415 INFO L226 Difference]: Without dead ends: 91353 [2021-05-03 13:55:26,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1470.1ms TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 13:55:26,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91353 states. [2021-05-03 13:55:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91353 to 91255. [2021-05-03 13:55:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91255 states, 91254 states have (on average 2.3073289937975323) internal successors, (210553), 91254 states have internal predecessors, (210553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:27,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91255 states to 91255 states and 210553 transitions. [2021-05-03 13:55:27,800 INFO L78 Accepts]: Start accepts. Automaton has 91255 states and 210553 transitions. Word has length 44 [2021-05-03 13:55:27,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:27,800 INFO L480 AbstractCegarLoop]: Abstraction has 91255 states and 210553 transitions. [2021-05-03 13:55:27,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:27,800 INFO L276 IsEmpty]: Start isEmpty. Operand 91255 states and 210553 transitions. [2021-05-03 13:55:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:27,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:27,854 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:28,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:28,055 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1488997286, now seen corresponding path program 164 times [2021-05-03 13:55:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:28,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986842646] [2021-05-03 13:55:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986842646] [2021-05-03 13:55:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360978893] [2021-05-03 13:55:28,470 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:28,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:55:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:55:29,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:29,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:55:29,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031415109] [2021-05-03 13:55:29,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:55:29,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:55:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:55:29,066 INFO L87 Difference]: Start difference. First operand 91255 states and 210553 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:31,572 INFO L93 Difference]: Finished difference Result 96202 states and 221311 transitions. [2021-05-03 13:55:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:55:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:31,726 INFO L225 Difference]: With dead ends: 96202 [2021-05-03 13:55:31,726 INFO L226 Difference]: Without dead ends: 96159 [2021-05-03 13:55:31,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1499.4ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:55:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96159 states. [2021-05-03 13:55:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96159 to 93581. [2021-05-03 13:55:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93581 states, 93580 states have (on average 2.3081320795041678) internal successors, (215995), 93580 states have internal predecessors, (215995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:33,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93581 states to 93581 states and 215995 transitions. [2021-05-03 13:55:33,202 INFO L78 Accepts]: Start accepts. Automaton has 93581 states and 215995 transitions. Word has length 44 [2021-05-03 13:55:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:33,202 INFO L480 AbstractCegarLoop]: Abstraction has 93581 states and 215995 transitions. [2021-05-03 13:55:33,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 93581 states and 215995 transitions. [2021-05-03 13:55:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:33,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:33,250 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:33,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:33,451 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash 858850796, now seen corresponding path program 165 times [2021-05-03 13:55:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:33,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840818338] [2021-05-03 13:55:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:33,841 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-05-03 13:55:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:34,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840818338] [2021-05-03 13:55:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704321122] [2021-05-03 13:55:34,149 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:34,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:55:34,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:34,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:34,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:34,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:55:34,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807628081] [2021-05-03 13:55:34,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:55:34,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:34,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:55:34,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:55:34,873 INFO L87 Difference]: Start difference. First operand 93581 states and 215995 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:37,074 INFO L93 Difference]: Finished difference Result 94378 states and 217720 transitions. [2021-05-03 13:55:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:55:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:37,221 INFO L225 Difference]: With dead ends: 94378 [2021-05-03 13:55:37,221 INFO L226 Difference]: Without dead ends: 94361 [2021-05-03 13:55:37,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1771.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1362, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:55:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94361 states. [2021-05-03 13:55:38,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94361 to 94068. [2021-05-03 13:55:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94068 states, 94067 states have (on average 2.308577928497773) internal successors, (217161), 94067 states have internal predecessors, (217161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94068 states to 94068 states and 217161 transitions. [2021-05-03 13:55:38,955 INFO L78 Accepts]: Start accepts. Automaton has 94068 states and 217161 transitions. Word has length 44 [2021-05-03 13:55:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:38,955 INFO L480 AbstractCegarLoop]: Abstraction has 94068 states and 217161 transitions. [2021-05-03 13:55:38,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 94068 states and 217161 transitions. [2021-05-03 13:55:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:39,016 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:39,016 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:39,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:39,216 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:39,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1216854550, now seen corresponding path program 166 times [2021-05-03 13:55:39,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:39,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455607900] [2021-05-03 13:55:39,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:39,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455607900] [2021-05-03 13:55:39,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221032063] [2021-05-03 13:55:39,582 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:39,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:55:39,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:39,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:40,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:40,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:55:40,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804382284] [2021-05-03 13:55:40,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:55:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:55:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:55:40,044 INFO L87 Difference]: Start difference. First operand 94068 states and 217161 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:42,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:42,484 INFO L93 Difference]: Finished difference Result 94858 states and 218871 transitions. [2021-05-03 13:55:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:55:42,486 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:42,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:42,650 INFO L225 Difference]: With dead ends: 94858 [2021-05-03 13:55:42,650 INFO L226 Difference]: Without dead ends: 94841 [2021-05-03 13:55:42,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1225.5ms TimeCoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:55:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94841 states. [2021-05-03 13:55:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94841 to 94550. [2021-05-03 13:55:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94550 states, 94549 states have (on average 2.3090143734994553) internal successors, (218315), 94549 states have internal predecessors, (218315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94550 states to 94550 states and 218315 transitions. [2021-05-03 13:55:44,046 INFO L78 Accepts]: Start accepts. Automaton has 94550 states and 218315 transitions. Word has length 44 [2021-05-03 13:55:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:44,046 INFO L480 AbstractCegarLoop]: Abstraction has 94550 states and 218315 transitions. [2021-05-03 13:55:44,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 94550 states and 218315 transitions. [2021-05-03 13:55:44,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:44,103 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:44,103 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:44,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-03 13:55:44,317 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:44,317 INFO L82 PathProgramCache]: Analyzing trace with hash -208088640, now seen corresponding path program 167 times [2021-05-03 13:55:44,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:44,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023248511] [2021-05-03 13:55:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023248511] [2021-05-03 13:55:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829728144] [2021-05-03 13:55:44,802 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:44,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 13:55:44,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:45,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:45,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-03 13:55:45,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054093836] [2021-05-03 13:55:45,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 13:55:45,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:45,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 13:55:45,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:55:45,915 INFO L87 Difference]: Start difference. First operand 94550 states and 218315 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:49,322 INFO L93 Difference]: Finished difference Result 95875 states and 221116 transitions. [2021-05-03 13:55:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 13:55:49,323 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:49,446 INFO L225 Difference]: With dead ends: 95875 [2021-05-03 13:55:49,447 INFO L226 Difference]: Without dead ends: 95858 [2021-05-03 13:55:49,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 2653.0ms TimeCoverageRelationStatistics Valid=177, Invalid=2273, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:55:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95858 states. [2021-05-03 13:55:50,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95858 to 95022. [2021-05-03 13:55:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95022 states, 95021 states have (on average 2.3094368613253913) internal successors, (219445), 95021 states have internal predecessors, (219445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95022 states to 95022 states and 219445 transitions. [2021-05-03 13:55:51,330 INFO L78 Accepts]: Start accepts. Automaton has 95022 states and 219445 transitions. Word has length 44 [2021-05-03 13:55:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:51,331 INFO L480 AbstractCegarLoop]: Abstraction has 95022 states and 219445 transitions. [2021-05-03 13:55:51,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 95022 states and 219445 transitions. [2021-05-03 13:55:51,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:51,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:51,387 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:51,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 13:55:51,597 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1703774524, now seen corresponding path program 168 times [2021-05-03 13:55:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:51,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072901150] [2021-05-03 13:55:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:51,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072901150] [2021-05-03 13:55:51,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537130820] [2021-05-03 13:55:51,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:51,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 13:55:51,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:55:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:51,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:52,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:52,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:55:52,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352151900] [2021-05-03 13:55:52,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:55:52,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:52,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:55:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:55:52,714 INFO L87 Difference]: Start difference. First operand 95022 states and 219445 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:55:56,107 INFO L93 Difference]: Finished difference Result 102468 states and 235515 transitions. [2021-05-03 13:55:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:55:56,108 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:55:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:55:56,485 INFO L225 Difference]: With dead ends: 102468 [2021-05-03 13:55:56,486 INFO L226 Difference]: Without dead ends: 102434 [2021-05-03 13:55:56,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1781.7ms TimeCoverageRelationStatistics Valid=154, Invalid=2102, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 13:55:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102434 states. [2021-05-03 13:55:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102434 to 96867. [2021-05-03 13:55:57,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96867 states, 96866 states have (on average 2.3116573410691057) internal successors, (223921), 96866 states have internal predecessors, (223921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96867 states to 96867 states and 223921 transitions. [2021-05-03 13:55:57,954 INFO L78 Accepts]: Start accepts. Automaton has 96867 states and 223921 transitions. Word has length 44 [2021-05-03 13:55:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:55:57,954 INFO L480 AbstractCegarLoop]: Abstraction has 96867 states and 223921 transitions. [2021-05-03 13:55:57,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:55:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 96867 states and 223921 transitions. [2021-05-03 13:55:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:55:58,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:55:58,008 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:55:58,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-03 13:55:58,221 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:55:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:55:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash -710458764, now seen corresponding path program 169 times [2021-05-03 13:55:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:55:58,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587782396] [2021-05-03 13:55:58,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:55:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:55:58,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587782396] [2021-05-03 13:55:58,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209961458] [2021-05-03 13:55:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:55:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:55:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:55:58,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:55:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:55:59,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:55:59,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:55:59,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764422748] [2021-05-03 13:55:59,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:55:59,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:55:59,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:55:59,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:55:59,319 INFO L87 Difference]: Start difference. First operand 96867 states and 223921 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:00,885 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 13:56:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:01,967 INFO L93 Difference]: Finished difference Result 98052 states and 226487 transitions. [2021-05-03 13:56:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:56:01,969 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:02,125 INFO L225 Difference]: With dead ends: 98052 [2021-05-03 13:56:02,125 INFO L226 Difference]: Without dead ends: 98018 [2021-05-03 13:56:02,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1793.7ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:56:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98018 states. [2021-05-03 13:56:03,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98018 to 97513. [2021-05-03 13:56:03,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97513 states, 97512 states have (on average 2.3119000738370663) internal successors, (225438), 97512 states have internal predecessors, (225438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97513 states to 97513 states and 225438 transitions. [2021-05-03 13:56:03,734 INFO L78 Accepts]: Start accepts. Automaton has 97513 states and 225438 transitions. Word has length 44 [2021-05-03 13:56:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:03,734 INFO L480 AbstractCegarLoop]: Abstraction has 97513 states and 225438 transitions. [2021-05-03 13:56:03,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 97513 states and 225438 transitions. [2021-05-03 13:56:03,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:03,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:03,791 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:03,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:03,991 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:03,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash -751175620, now seen corresponding path program 170 times [2021-05-03 13:56:03,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:03,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335464517] [2021-05-03 13:56:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335464517] [2021-05-03 13:56:04,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126680640] [2021-05-03 13:56:04,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:04,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:56:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:04,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:05,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:05,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:56:05,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097669780] [2021-05-03 13:56:05,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:56:05,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:05,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:56:05,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:56:05,673 INFO L87 Difference]: Start difference. First operand 97513 states and 225438 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:08,211 INFO L93 Difference]: Finished difference Result 97953 states and 226362 transitions. [2021-05-03 13:56:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:56:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:08,370 INFO L225 Difference]: With dead ends: 97953 [2021-05-03 13:56:08,370 INFO L226 Difference]: Without dead ends: 97919 [2021-05-03 13:56:08,370 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1834.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:56:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97919 states. [2021-05-03 13:56:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97919 to 97846. [2021-05-03 13:56:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97846 states, 97845 states have (on average 2.3113802442638867) internal successors, (226157), 97845 states have internal predecessors, (226157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97846 states to 97846 states and 226157 transitions. [2021-05-03 13:56:10,157 INFO L78 Accepts]: Start accepts. Automaton has 97846 states and 226157 transitions. Word has length 44 [2021-05-03 13:56:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:10,157 INFO L480 AbstractCegarLoop]: Abstraction has 97846 states and 226157 transitions. [2021-05-03 13:56:10,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 97846 states and 226157 transitions. [2021-05-03 13:56:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:10,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:10,213 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:10,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:10,414 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:10,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:10,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1028586692, now seen corresponding path program 171 times [2021-05-03 13:56:10,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:10,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547642358] [2021-05-03 13:56:10,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:10,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547642358] [2021-05-03 13:56:10,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592891562] [2021-05-03 13:56:10,706 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:10,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:56:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:10,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:10,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:11,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:11,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:56:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293165731] [2021-05-03 13:56:11,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:56:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:56:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:56:11,520 INFO L87 Difference]: Start difference. First operand 97846 states and 226157 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:15,126 INFO L93 Difference]: Finished difference Result 107624 states and 247584 transitions. [2021-05-03 13:56:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 13:56:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:15,329 INFO L225 Difference]: With dead ends: 107624 [2021-05-03 13:56:15,329 INFO L226 Difference]: Without dead ends: 107555 [2021-05-03 13:56:15,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1884.8ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:56:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107555 states. [2021-05-03 13:56:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107555 to 101908. [2021-05-03 13:56:16,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101908 states, 101907 states have (on average 2.3131286368944233) internal successors, (235724), 101907 states have internal predecessors, (235724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101908 states to 101908 states and 235724 transitions. [2021-05-03 13:56:17,494 INFO L78 Accepts]: Start accepts. Automaton has 101908 states and 235724 transitions. Word has length 44 [2021-05-03 13:56:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:17,494 INFO L480 AbstractCegarLoop]: Abstraction has 101908 states and 235724 transitions. [2021-05-03 13:56:17,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:17,494 INFO L276 IsEmpty]: Start isEmpty. Operand 101908 states and 235724 transitions. [2021-05-03 13:56:17,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:17,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:17,546 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:17,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:17,746 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 938145336, now seen corresponding path program 172 times [2021-05-03 13:56:17,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:17,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480354053] [2021-05-03 13:56:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:18,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480354053] [2021-05-03 13:56:18,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728634658] [2021-05-03 13:56:18,244 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:18,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:56:18,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:18,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:18,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:56:19,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:19,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:56:19,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816375777] [2021-05-03 13:56:19,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:56:19,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:56:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:56:19,223 INFO L87 Difference]: Start difference. First operand 101908 states and 235724 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:22,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:22,385 INFO L93 Difference]: Finished difference Result 105337 states and 243024 transitions. [2021-05-03 13:56:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 13:56:22,387 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:22,911 INFO L225 Difference]: With dead ends: 105337 [2021-05-03 13:56:22,911 INFO L226 Difference]: Without dead ends: 105303 [2021-05-03 13:56:22,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 2087.4ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 13:56:23,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105303 states. [2021-05-03 13:56:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105303 to 102649. [2021-05-03 13:56:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102649 states, 102648 states have (on average 2.3128361000701427) internal successors, (237408), 102648 states have internal predecessors, (237408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102649 states to 102649 states and 237408 transitions. [2021-05-03 13:56:24,562 INFO L78 Accepts]: Start accepts. Automaton has 102649 states and 237408 transitions. Word has length 44 [2021-05-03 13:56:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:24,562 INFO L480 AbstractCegarLoop]: Abstraction has 102649 states and 237408 transitions. [2021-05-03 13:56:24,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 102649 states and 237408 transitions. [2021-05-03 13:56:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:24,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:24,624 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:24,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:24,825 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:24,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:24,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1319261390, now seen corresponding path program 173 times [2021-05-03 13:56:24,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:24,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681757461] [2021-05-03 13:56:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681757461] [2021-05-03 13:56:25,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172764135] [2021-05-03 13:56:25,313 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:25,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:56:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:25,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:26,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:26,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-03 13:56:26,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497747644] [2021-05-03 13:56:26,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 13:56:26,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:26,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 13:56:26,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:56:26,467 INFO L87 Difference]: Start difference. First operand 102649 states and 237408 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:30,625 INFO L93 Difference]: Finished difference Result 106385 states and 245433 transitions. [2021-05-03 13:56:30,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 13:56:30,627 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:30,826 INFO L225 Difference]: With dead ends: 106385 [2021-05-03 13:56:30,826 INFO L226 Difference]: Without dead ends: 106368 [2021-05-03 13:56:30,826 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 2815.6ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:56:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106368 states. [2021-05-03 13:56:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106368 to 103417. [2021-05-03 13:56:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103417 states, 103416 states have (on average 2.313549160671463) internal successors, (239258), 103416 states have internal predecessors, (239258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103417 states to 103417 states and 239258 transitions. [2021-05-03 13:56:32,756 INFO L78 Accepts]: Start accepts. Automaton has 103417 states and 239258 transitions. Word has length 44 [2021-05-03 13:56:32,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:32,756 INFO L480 AbstractCegarLoop]: Abstraction has 103417 states and 239258 transitions. [2021-05-03 13:56:32,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 103417 states and 239258 transitions. [2021-05-03 13:56:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:32,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:32,814 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:33,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:33,018 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1040789202, now seen corresponding path program 174 times [2021-05-03 13:56:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:33,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142402141] [2021-05-03 13:56:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142402141] [2021-05-03 13:56:33,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412719693] [2021-05-03 13:56:33,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:33,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 13:56:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:33,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:33,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:34,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:34,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:56:34,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111483621] [2021-05-03 13:56:34,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:56:34,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:34,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:56:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:56:34,481 INFO L87 Difference]: Start difference. First operand 103417 states and 239258 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:38,379 INFO L93 Difference]: Finished difference Result 113434 states and 261363 transitions. [2021-05-03 13:56:38,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:56:38,380 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:38,537 INFO L225 Difference]: With dead ends: 113434 [2021-05-03 13:56:38,537 INFO L226 Difference]: Without dead ends: 113400 [2021-05-03 13:56:38,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2204.2ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:56:38,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113400 states. [2021-05-03 13:56:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113400 to 107359. [2021-05-03 13:56:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107359 states, 107358 states have (on average 2.3174612045678944) internal successors, (248798), 107358 states have internal predecessors, (248798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107359 states to 107359 states and 248798 transitions. [2021-05-03 13:56:40,795 INFO L78 Accepts]: Start accepts. Automaton has 107359 states and 248798 transitions. Word has length 44 [2021-05-03 13:56:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:40,796 INFO L480 AbstractCegarLoop]: Abstraction has 107359 states and 248798 transitions. [2021-05-03 13:56:40,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 107359 states and 248798 transitions. [2021-05-03 13:56:40,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:40,852 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:40,852 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:41,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:41,053 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1000072346, now seen corresponding path program 175 times [2021-05-03 13:56:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:41,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131295054] [2021-05-03 13:56:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:41,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131295054] [2021-05-03 13:56:41,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695465557] [2021-05-03 13:56:41,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:41,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:42,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:56:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488354928] [2021-05-03 13:56:42,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:56:42,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:56:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:56:42,375 INFO L87 Difference]: Start difference. First operand 107359 states and 248798 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:45,216 INFO L93 Difference]: Finished difference Result 107947 states and 250062 transitions. [2021-05-03 13:56:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:56:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:45,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:45,432 INFO L225 Difference]: With dead ends: 107947 [2021-05-03 13:56:45,432 INFO L226 Difference]: Without dead ends: 107913 [2021-05-03 13:56:45,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1837.4ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 13:56:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107913 states. [2021-05-03 13:56:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107913 to 107616. [2021-05-03 13:56:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107616 states, 107615 states have (on average 2.3171490963155694) internal successors, (249360), 107615 states have internal predecessors, (249360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107616 states to 107616 states and 249360 transitions. [2021-05-03 13:56:47,371 INFO L78 Accepts]: Start accepts. Automaton has 107616 states and 249360 transitions. Word has length 44 [2021-05-03 13:56:47,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:47,371 INFO L480 AbstractCegarLoop]: Abstraction has 107616 states and 249360 transitions. [2021-05-03 13:56:47,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:47,371 INFO L276 IsEmpty]: Start isEmpty. Operand 107616 states and 249360 transitions. [2021-05-03 13:56:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:47,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:47,431 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:47,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:47,632 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1402553298, now seen corresponding path program 176 times [2021-05-03 13:56:47,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:47,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235679941] [2021-05-03 13:56:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235679941] [2021-05-03 13:56:48,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583192435] [2021-05-03 13:56:48,131 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:48,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:56:48,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:48,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:56:49,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:49,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:56:49,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844295073] [2021-05-03 13:56:49,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:56:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:49,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:56:49,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:56:49,120 INFO L87 Difference]: Start difference. First operand 107616 states and 249360 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:51,102 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-05-03 13:56:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:56:52,224 INFO L93 Difference]: Finished difference Result 108285 states and 250781 transitions. [2021-05-03 13:56:52,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 13:56:52,226 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:56:52,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:56:52,444 INFO L225 Difference]: With dead ends: 108285 [2021-05-03 13:56:52,444 INFO L226 Difference]: Without dead ends: 108251 [2021-05-03 13:56:52,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2300.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 13:56:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108251 states. [2021-05-03 13:56:54,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108251 to 107958. [2021-05-03 13:56:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107958 states, 107957 states have (on average 2.316616801133785) internal successors, (250095), 107957 states have internal predecessors, (250095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107958 states to 107958 states and 250095 transitions. [2021-05-03 13:56:54,636 INFO L78 Accepts]: Start accepts. Automaton has 107958 states and 250095 transitions. Word has length 44 [2021-05-03 13:56:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:56:54,636 INFO L480 AbstractCegarLoop]: Abstraction has 107958 states and 250095 transitions. [2021-05-03 13:56:54,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:56:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 107958 states and 250095 transitions. [2021-05-03 13:56:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:56:54,681 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:56:54,681 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:56:54,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:54,881 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:56:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:56:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash 402638746, now seen corresponding path program 177 times [2021-05-03 13:56:54,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:56:54,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581269062] [2021-05-03 13:56:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:56:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:56:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:56:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581269062] [2021-05-03 13:56:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105426997] [2021-05-03 13:56:55,340 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:56:55,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:56:55,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:56:55,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:56:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:56:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:56:56,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:56:56,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:56:56,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893863826] [2021-05-03 13:56:56,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:56:56,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:56:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:56:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:56:56,458 INFO L87 Difference]: Start difference. First operand 107958 states and 250095 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:00,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:00,449 INFO L93 Difference]: Finished difference Result 113083 states and 261318 transitions. [2021-05-03 13:57:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:57:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:00,653 INFO L225 Difference]: With dead ends: 113083 [2021-05-03 13:57:00,653 INFO L226 Difference]: Without dead ends: 113048 [2021-05-03 13:57:00,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 2480.2ms TimeCoverageRelationStatistics Valid=190, Invalid=2360, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:57:00,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113048 states. [2021-05-03 13:57:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113048 to 110015. [2021-05-03 13:57:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110015 states, 110014 states have (on average 2.316923300670824) internal successors, (254894), 110014 states have internal predecessors, (254894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110015 states to 110015 states and 254894 transitions. [2021-05-03 13:57:02,364 INFO L78 Accepts]: Start accepts. Automaton has 110015 states and 254894 transitions. Word has length 44 [2021-05-03 13:57:02,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:02,364 INFO L480 AbstractCegarLoop]: Abstraction has 110015 states and 254894 transitions. [2021-05-03 13:57:02,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:02,364 INFO L276 IsEmpty]: Start isEmpty. Operand 110015 states and 254894 transitions. [2021-05-03 13:57:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:02,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:02,409 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:02,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:02,609 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1512322538, now seen corresponding path program 178 times [2021-05-03 13:57:02,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:02,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363971997] [2021-05-03 13:57:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:03,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363971997] [2021-05-03 13:57:03,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093403988] [2021-05-03 13:57:03,100 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:03,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:57:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:04,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:04,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:57:04,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776205368] [2021-05-03 13:57:04,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:57:04,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:04,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:57:04,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:57:04,063 INFO L87 Difference]: Start difference. First operand 110015 states and 254894 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:06,089 INFO L93 Difference]: Finished difference Result 113021 states and 261647 transitions. [2021-05-03 13:57:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 13:57:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:06,286 INFO L225 Difference]: With dead ends: 113021 [2021-05-03 13:57:06,286 INFO L226 Difference]: Without dead ends: 112978 [2021-05-03 13:57:06,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1817.4ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:57:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112978 states. [2021-05-03 13:57:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112978 to 112408. [2021-05-03 13:57:08,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112408 states, 112407 states have (on average 2.317604775503305) internal successors, (260515), 112407 states have internal predecessors, (260515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112408 states to 112408 states and 260515 transitions. [2021-05-03 13:57:08,354 INFO L78 Accepts]: Start accepts. Automaton has 112408 states and 260515 transitions. Word has length 44 [2021-05-03 13:57:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:08,354 INFO L480 AbstractCegarLoop]: Abstraction has 112408 states and 260515 transitions. [2021-05-03 13:57:08,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:08,354 INFO L276 IsEmpty]: Start isEmpty. Operand 112408 states and 260515 transitions. [2021-05-03 13:57:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:08,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:08,417 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:08,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-03 13:57:08,617 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:08,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:08,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1543995358, now seen corresponding path program 179 times [2021-05-03 13:57:08,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:08,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019945115] [2021-05-03 13:57:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:08,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:09,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019945115] [2021-05-03 13:57:09,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283529463] [2021-05-03 13:57:09,105 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:09,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:57:09,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:10,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:10,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:57:10,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785701173] [2021-05-03 13:57:10,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:57:10,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:57:10,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:57:10,015 INFO L87 Difference]: Start difference. First operand 112408 states and 260515 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:12,176 INFO L93 Difference]: Finished difference Result 113524 states and 262883 transitions. [2021-05-03 13:57:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:57:12,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:12,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:12,390 INFO L225 Difference]: With dead ends: 113524 [2021-05-03 13:57:12,390 INFO L226 Difference]: Without dead ends: 113481 [2021-05-03 13:57:12,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1707.8ms TimeCoverageRelationStatistics Valid=140, Invalid=1500, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:57:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113481 states. [2021-05-03 13:57:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113481 to 113164. [2021-05-03 13:57:13,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113164 states, 113163 states have (on average 2.3171796435230596) internal successors, (262219), 113163 states have internal predecessors, (262219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113164 states to 113164 states and 262219 transitions. [2021-05-03 13:57:14,245 INFO L78 Accepts]: Start accepts. Automaton has 113164 states and 262219 transitions. Word has length 44 [2021-05-03 13:57:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:14,245 INFO L480 AbstractCegarLoop]: Abstraction has 113164 states and 262219 transitions. [2021-05-03 13:57:14,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 113164 states and 262219 transitions. [2021-05-03 13:57:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:14,308 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:14,308 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:14,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:14,510 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:14,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:14,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476310, now seen corresponding path program 180 times [2021-05-03 13:57:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:14,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991748634] [2021-05-03 13:57:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:15,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991748634] [2021-05-03 13:57:15,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538293578] [2021-05-03 13:57:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:15,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:57:15,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:16,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:16,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:57:16,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238365052] [2021-05-03 13:57:16,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:57:16,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:16,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:57:16,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:57:16,498 INFO L87 Difference]: Start difference. First operand 113164 states and 262219 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:19,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:19,518 INFO L93 Difference]: Finished difference Result 122596 states and 283278 transitions. [2021-05-03 13:57:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 13:57:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:19,750 INFO L225 Difference]: With dead ends: 122596 [2021-05-03 13:57:19,750 INFO L226 Difference]: Without dead ends: 122544 [2021-05-03 13:57:19,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 2490.9ms TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 13:57:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122544 states. [2021-05-03 13:57:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122544 to 115729. [2021-05-03 13:57:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115729 states, 115728 states have (on average 2.3181425411309275) internal successors, (268274), 115728 states have internal predecessors, (268274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115729 states to 115729 states and 268274 transitions. [2021-05-03 13:57:21,834 INFO L78 Accepts]: Start accepts. Automaton has 115729 states and 268274 transitions. Word has length 44 [2021-05-03 13:57:21,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:21,834 INFO L480 AbstractCegarLoop]: Abstraction has 115729 states and 268274 transitions. [2021-05-03 13:57:21,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:21,834 INFO L276 IsEmpty]: Start isEmpty. Operand 115729 states and 268274 transitions. [2021-05-03 13:57:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:21,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:21,890 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:22,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-05-03 13:57:22,093 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 220708932, now seen corresponding path program 181 times [2021-05-03 13:57:22,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:22,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532705588] [2021-05-03 13:57:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532705588] [2021-05-03 13:57:22,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351204103] [2021-05-03 13:57:22,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:22,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:22,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:23,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:23,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:57:23,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591433064] [2021-05-03 13:57:23,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:57:23,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:23,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:57:23,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:57:23,540 INFO L87 Difference]: Start difference. First operand 115729 states and 268274 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:24,322 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 13:57:25,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:25,940 INFO L93 Difference]: Finished difference Result 116567 states and 270039 transitions. [2021-05-03 13:57:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:57:25,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:26,145 INFO L225 Difference]: With dead ends: 116567 [2021-05-03 13:57:26,145 INFO L226 Difference]: Without dead ends: 116541 [2021-05-03 13:57:26,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2056.7ms TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 13:57:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116541 states. [2021-05-03 13:57:28,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116541 to 116235. [2021-05-03 13:57:28,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116235 states, 116234 states have (on average 2.317944835418208) internal successors, (269424), 116234 states have internal predecessors, (269424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116235 states to 116235 states and 269424 transitions. [2021-05-03 13:57:28,342 INFO L78 Accepts]: Start accepts. Automaton has 116235 states and 269424 transitions. Word has length 44 [2021-05-03 13:57:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:28,342 INFO L480 AbstractCegarLoop]: Abstraction has 116235 states and 269424 transitions. [2021-05-03 13:57:28,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 116235 states and 269424 transitions. [2021-05-03 13:57:28,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:28,389 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:28,389 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:28,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:28,597 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash 623189884, now seen corresponding path program 182 times [2021-05-03 13:57:28,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:28,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299727637] [2021-05-03 13:57:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:29,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299727637] [2021-05-03 13:57:29,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239161893] [2021-05-03 13:57:29,135 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:29,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:57:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:30,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:30,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:57:30,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391600609] [2021-05-03 13:57:30,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:57:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:57:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:57:30,198 INFO L87 Difference]: Start difference. First operand 116235 states and 269424 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:33,547 INFO L93 Difference]: Finished difference Result 120186 states and 278104 transitions. [2021-05-03 13:57:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 13:57:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:33,806 INFO L225 Difference]: With dead ends: 120186 [2021-05-03 13:57:33,807 INFO L226 Difference]: Without dead ends: 120151 [2021-05-03 13:57:33,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1936.7ms TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 13:57:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120151 states. [2021-05-03 13:57:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120151 to 118696. [2021-05-03 13:57:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118696 states, 118695 states have (on average 2.3184548633051096) internal successors, (275189), 118695 states have internal predecessors, (275189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:36,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118696 states to 118696 states and 275189 transitions. [2021-05-03 13:57:36,193 INFO L78 Accepts]: Start accepts. Automaton has 118696 states and 275189 transitions. Word has length 44 [2021-05-03 13:57:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:36,193 INFO L480 AbstractCegarLoop]: Abstraction has 118696 states and 275189 transitions. [2021-05-03 13:57:36,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 118696 states and 275189 transitions. [2021-05-03 13:57:36,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:36,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:36,287 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:36,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:36,487 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:36,487 INFO L82 PathProgramCache]: Analyzing trace with hash 538134874, now seen corresponding path program 183 times [2021-05-03 13:57:36,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:36,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42080014] [2021-05-03 13:57:36,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:37,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42080014] [2021-05-03 13:57:37,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552989627] [2021-05-03 13:57:37,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:37,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:57:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:37,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:38,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:38,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:57:38,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398356344] [2021-05-03 13:57:38,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:57:38,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:57:38,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:57:38,229 INFO L87 Difference]: Start difference. First operand 118696 states and 275189 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:42,569 INFO L93 Difference]: Finished difference Result 121717 states and 281691 transitions. [2021-05-03 13:57:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 13:57:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:42,726 INFO L225 Difference]: With dead ends: 121717 [2021-05-03 13:57:42,726 INFO L226 Difference]: Without dead ends: 121674 [2021-05-03 13:57:42,726 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2447.5ms TimeCoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 13:57:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121674 states. [2021-05-03 13:57:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121674 to 120316. [2021-05-03 13:57:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120316 states, 120315 states have (on average 2.3182146864480737) internal successors, (278916), 120315 states have internal predecessors, (278916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120316 states to 120316 states and 278916 transitions. [2021-05-03 13:57:44,617 INFO L78 Accepts]: Start accepts. Automaton has 120316 states and 278916 transitions. Word has length 44 [2021-05-03 13:57:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:44,617 INFO L480 AbstractCegarLoop]: Abstraction has 120316 states and 278916 transitions. [2021-05-03 13:57:44,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:44,617 INFO L276 IsEmpty]: Start isEmpty. Operand 120316 states and 278916 transitions. [2021-05-03 13:57:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:44,668 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:44,668 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:44,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-03 13:57:44,868 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash 300697604, now seen corresponding path program 184 times [2021-05-03 13:57:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:44,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368794794] [2021-05-03 13:57:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368794794] [2021-05-03 13:57:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755201584] [2021-05-03 13:57:45,271 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:45,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:57:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:57:46,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:46,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2021-05-03 13:57:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706695191] [2021-05-03 13:57:46,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:57:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:57:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=796, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:57:46,758 INFO L87 Difference]: Start difference. First operand 120316 states and 278916 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:48,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:48,813 INFO L93 Difference]: Finished difference Result 124683 states and 288562 transitions. [2021-05-03 13:57:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 13:57:48,815 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:48,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:49,012 INFO L225 Difference]: With dead ends: 124683 [2021-05-03 13:57:49,012 INFO L226 Difference]: Without dead ends: 124640 [2021-05-03 13:57:49,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2044.0ms TimeCoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:57:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124640 states. [2021-05-03 13:57:50,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124640 to 123298. [2021-05-03 13:57:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123298 states, 123297 states have (on average 2.3185722280347454) internal successors, (285873), 123297 states have internal predecessors, (285873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123298 states to 123298 states and 285873 transitions. [2021-05-03 13:57:51,214 INFO L78 Accepts]: Start accepts. Automaton has 123298 states and 285873 transitions. Word has length 44 [2021-05-03 13:57:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:51,214 INFO L480 AbstractCegarLoop]: Abstraction has 123298 states and 285873 transitions. [2021-05-03 13:57:51,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 123298 states and 285873 transitions. [2021-05-03 13:57:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:51,268 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:51,268 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:51,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:51,469 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 787269176, now seen corresponding path program 185 times [2021-05-03 13:57:51,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:51,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779196383] [2021-05-03 13:57:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779196383] [2021-05-03 13:57:51,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767641717] [2021-05-03 13:57:51,765 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:51,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:57:51,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:51,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:51,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:57:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:57:52,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:57:52,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:57:52,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041794879] [2021-05-03 13:57:52,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:57:52,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:57:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:57:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:57:52,698 INFO L87 Difference]: Start difference. First operand 123298 states and 285873 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:54,711 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2021-05-03 13:57:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:57:55,821 INFO L93 Difference]: Finished difference Result 124836 states and 289269 transitions. [2021-05-03 13:57:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:57:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:57:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:57:56,063 INFO L225 Difference]: With dead ends: 124836 [2021-05-03 13:57:56,063 INFO L226 Difference]: Without dead ends: 124802 [2021-05-03 13:57:56,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1993.3ms TimeCoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 13:57:56,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124802 states. [2021-05-03 13:57:57,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124802 to 124438. [2021-05-03 13:57:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124438 states, 124437 states have (on average 2.3188521099030033) internal successors, (288551), 124437 states have internal predecessors, (288551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124438 states to 124438 states and 288551 transitions. [2021-05-03 13:57:58,356 INFO L78 Accepts]: Start accepts. Automaton has 124438 states and 288551 transitions. Word has length 44 [2021-05-03 13:57:58,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:57:58,356 INFO L480 AbstractCegarLoop]: Abstraction has 124438 states and 288551 transitions. [2021-05-03 13:57:58,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:57:58,356 INFO L276 IsEmpty]: Start isEmpty. Operand 124438 states and 288551 transitions. [2021-05-03 13:57:58,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:57:58,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:57:58,432 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:57:58,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:58,632 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:57:58,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:57:58,632 INFO L82 PathProgramCache]: Analyzing trace with hash -451380224, now seen corresponding path program 186 times [2021-05-03 13:57:58,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:57:58,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707407176] [2021-05-03 13:57:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:57:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:57:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:57:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707407176] [2021-05-03 13:57:59,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42469041] [2021-05-03 13:57:59,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:57:59,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:57:59,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:57:59,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:57:59,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:00,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:00,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-05-03 13:58:00,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765839888] [2021-05-03 13:58:00,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 13:58:00,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:00,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 13:58:00,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 13:58:00,381 INFO L87 Difference]: Start difference. First operand 124438 states and 288551 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:05,306 INFO L93 Difference]: Finished difference Result 131445 states and 303815 transitions. [2021-05-03 13:58:05,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 13:58:05,308 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:05,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:05,501 INFO L225 Difference]: With dead ends: 131445 [2021-05-03 13:58:05,501 INFO L226 Difference]: Without dead ends: 131411 [2021-05-03 13:58:05,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3152.2ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:58:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131411 states. [2021-05-03 13:58:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131411 to 127435. [2021-05-03 13:58:07,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127435 states, 127434 states have (on average 2.3191299025377843) internal successors, (295536), 127434 states have internal predecessors, (295536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127435 states to 127435 states and 295536 transitions. [2021-05-03 13:58:07,883 INFO L78 Accepts]: Start accepts. Automaton has 127435 states and 295536 transitions. Word has length 44 [2021-05-03 13:58:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:07,884 INFO L480 AbstractCegarLoop]: Abstraction has 127435 states and 295536 transitions. [2021-05-03 13:58:07,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 127435 states and 295536 transitions. [2021-05-03 13:58:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:07,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:07,953 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:08,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:08,154 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:08,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:08,154 INFO L82 PathProgramCache]: Analyzing trace with hash -48899272, now seen corresponding path program 187 times [2021-05-03 13:58:08,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:08,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239566120] [2021-05-03 13:58:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239566120] [2021-05-03 13:58:08,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942342860] [2021-05-03 13:58:08,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:08,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:09,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:09,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:58:09,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362770476] [2021-05-03 13:58:09,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:58:09,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:09,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:58:09,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:58:09,646 INFO L87 Difference]: Start difference. First operand 127435 states and 295536 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:12,820 INFO L93 Difference]: Finished difference Result 127848 states and 296398 transitions. [2021-05-03 13:58:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:58:12,821 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:12,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:13,008 INFO L225 Difference]: With dead ends: 127848 [2021-05-03 13:58:13,008 INFO L226 Difference]: Without dead ends: 127814 [2021-05-03 13:58:13,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2490.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1822, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 13:58:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127814 states. [2021-05-03 13:58:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127814 to 127775. [2021-05-03 13:58:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127775 states, 127774 states have (on average 2.318585940801728) internal successors, (296255), 127774 states have internal predecessors, (296255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127775 states to 127775 states and 296255 transitions. [2021-05-03 13:58:15,325 INFO L78 Accepts]: Start accepts. Automaton has 127775 states and 296255 transitions. Word has length 44 [2021-05-03 13:58:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:15,325 INFO L480 AbstractCegarLoop]: Abstraction has 127775 states and 296255 transitions. [2021-05-03 13:58:15,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 127775 states and 296255 transitions. [2021-05-03 13:58:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:15,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:15,404 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:15,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-05-03 13:58:15,604 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:15,604 INFO L82 PathProgramCache]: Analyzing trace with hash -728791296, now seen corresponding path program 188 times [2021-05-03 13:58:15,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:15,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934376988] [2021-05-03 13:58:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:16,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934376988] [2021-05-03 13:58:16,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998745185] [2021-05-03 13:58:16,013 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:16,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:58:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:16,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:58:16,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:16,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:58:16,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844144969] [2021-05-03 13:58:16,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:58:16,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:16,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:58:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=855, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:58:16,876 INFO L87 Difference]: Start difference. First operand 127775 states and 296255 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:20,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:20,876 INFO L93 Difference]: Finished difference Result 135363 states and 313182 transitions. [2021-05-03 13:58:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 13:58:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:21,141 INFO L225 Difference]: With dead ends: 135363 [2021-05-03 13:58:21,141 INFO L226 Difference]: Without dead ends: 135320 [2021-05-03 13:58:21,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2205.5ms TimeCoverageRelationStatistics Valid=174, Invalid=2082, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 13:58:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135320 states. [2021-05-03 13:58:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135320 to 127786. [2021-05-03 13:58:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127786 states, 127785 states have (on average 2.3186211214148766) internal successors, (296285), 127785 states have internal predecessors, (296285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:23,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127786 states to 127786 states and 296285 transitions. [2021-05-03 13:58:23,963 INFO L78 Accepts]: Start accepts. Automaton has 127786 states and 296285 transitions. Word has length 44 [2021-05-03 13:58:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:23,963 INFO L480 AbstractCegarLoop]: Abstraction has 127786 states and 296285 transitions. [2021-05-03 13:58:23,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 127786 states and 296285 transitions. [2021-05-03 13:58:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:24,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:24,071 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:24,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 13:58:24,288 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash 475376078, now seen corresponding path program 189 times [2021-05-03 13:58:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:24,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097325934] [2021-05-03 13:58:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:25,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097325934] [2021-05-03 13:58:25,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960291722] [2021-05-03 13:58:25,088 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:25,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 13:58:25,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:26,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:26,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:58:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015636590] [2021-05-03 13:58:26,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:58:26,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:58:26,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:58:26,096 INFO L87 Difference]: Start difference. First operand 127786 states and 296285 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:29,319 INFO L93 Difference]: Finished difference Result 128874 states and 298650 transitions. [2021-05-03 13:58:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:58:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:29,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:29,562 INFO L225 Difference]: With dead ends: 128874 [2021-05-03 13:58:29,562 INFO L226 Difference]: Without dead ends: 128840 [2021-05-03 13:58:29,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2259.1ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:58:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128840 states. [2021-05-03 13:58:31,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128840 to 128388. [2021-05-03 13:58:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128388 states, 128387 states have (on average 2.3188562704946762) internal successors, (297711), 128387 states have internal predecessors, (297711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:31,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128388 states to 128388 states and 297711 transitions. [2021-05-03 13:58:31,594 INFO L78 Accepts]: Start accepts. Automaton has 128388 states and 297711 transitions. Word has length 44 [2021-05-03 13:58:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:31,595 INFO L480 AbstractCegarLoop]: Abstraction has 128388 states and 297711 transitions. [2021-05-03 13:58:31,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:31,595 INFO L276 IsEmpty]: Start isEmpty. Operand 128388 states and 297711 transitions. [2021-05-03 13:58:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:32,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:32,027 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:32,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:32,242 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:32,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash 434659222, now seen corresponding path program 190 times [2021-05-03 13:58:32,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:32,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428015382] [2021-05-03 13:58:32,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:32,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428015382] [2021-05-03 13:58:32,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643221977] [2021-05-03 13:58:32,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:32,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:58:32,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:33,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:33,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:58:33,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361756644] [2021-05-03 13:58:33,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:58:33,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:58:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:58:33,638 INFO L87 Difference]: Start difference. First operand 128388 states and 297711 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:36,531 INFO L93 Difference]: Finished difference Result 128806 states and 298588 transitions. [2021-05-03 13:58:36,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:58:36,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:36,772 INFO L225 Difference]: With dead ends: 128806 [2021-05-03 13:58:36,772 INFO L226 Difference]: Without dead ends: 128772 [2021-05-03 13:58:36,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1970.0ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:58:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128772 states. [2021-05-03 13:58:38,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128772 to 128723. [2021-05-03 13:58:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128723 states, 128722 states have (on average 2.318407109895744) internal successors, (298430), 128722 states have internal predecessors, (298430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128723 states to 128723 states and 298430 transitions. [2021-05-03 13:58:39,058 INFO L78 Accepts]: Start accepts. Automaton has 128723 states and 298430 transitions. Word has length 44 [2021-05-03 13:58:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:39,058 INFO L480 AbstractCegarLoop]: Abstraction has 128723 states and 298430 transitions. [2021-05-03 13:58:39,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 128723 states and 298430 transitions. [2021-05-03 13:58:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:39,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:39,138 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:39,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-03 13:58:39,339 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:39,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:39,339 INFO L82 PathProgramCache]: Analyzing trace with hash 837140174, now seen corresponding path program 191 times [2021-05-03 13:58:39,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:39,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170911936] [2021-05-03 13:58:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:39,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170911936] [2021-05-03 13:58:39,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060170857] [2021-05-03 13:58:39,883 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:39,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 13:58:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:41,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:41,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 13:58:41,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903412684] [2021-05-03 13:58:41,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 13:58:41,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:41,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 13:58:41,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-03 13:58:41,021 INFO L87 Difference]: Start difference. First operand 128723 states and 298430 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:44,931 INFO L93 Difference]: Finished difference Result 131900 states and 305203 transitions. [2021-05-03 13:58:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 13:58:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:45,216 INFO L225 Difference]: With dead ends: 131900 [2021-05-03 13:58:45,216 INFO L226 Difference]: Without dead ends: 131866 [2021-05-03 13:58:45,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2461.3ms TimeCoverageRelationStatistics Valid=165, Invalid=1905, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 13:58:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-05-03 13:58:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 129310. [2021-05-03 13:58:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129310 states, 129309 states have (on average 2.3184310450162013) internal successors, (299794), 129309 states have internal predecessors, (299794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129310 states to 129310 states and 299794 transitions. [2021-05-03 13:58:47,613 INFO L78 Accepts]: Start accepts. Automaton has 129310 states and 299794 transitions. Word has length 44 [2021-05-03 13:58:47,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:47,613 INFO L480 AbstractCegarLoop]: Abstraction has 129310 states and 299794 transitions. [2021-05-03 13:58:47,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 129310 states and 299794 transitions. [2021-05-03 13:58:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:47,690 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:47,690 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:47,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-03 13:58:47,891 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1110209028, now seen corresponding path program 192 times [2021-05-03 13:58:47,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:47,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419609590] [2021-05-03 13:58:47,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:48,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419609590] [2021-05-03 13:58:48,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471765672] [2021-05-03 13:58:48,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:48,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 13:58:48,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:58:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:48,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:58:49,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:49,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:58:49,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313288727] [2021-05-03 13:58:49,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:58:49,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:58:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:58:49,819 INFO L87 Difference]: Start difference. First operand 129310 states and 299794 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:51,768 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-05-03 13:58:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:58:54,001 INFO L93 Difference]: Finished difference Result 138710 states and 320991 transitions. [2021-05-03 13:58:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:58:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:58:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:58:54,271 INFO L225 Difference]: With dead ends: 138710 [2021-05-03 13:58:54,272 INFO L226 Difference]: Without dead ends: 138667 [2021-05-03 13:58:54,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2823.2ms TimeCoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 13:58:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138667 states. [2021-05-03 13:58:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138667 to 135897. [2021-05-03 13:58:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135897 states, 135896 states have (on average 2.319663566256549) internal successors, (315233), 135896 states have internal predecessors, (315233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:56,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135897 states to 135897 states and 315233 transitions. [2021-05-03 13:58:56,776 INFO L78 Accepts]: Start accepts. Automaton has 135897 states and 315233 transitions. Word has length 44 [2021-05-03 13:58:56,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:58:56,776 INFO L480 AbstractCegarLoop]: Abstraction has 135897 states and 315233 transitions. [2021-05-03 13:58:56,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:58:56,776 INFO L276 IsEmpty]: Start isEmpty. Operand 135897 states and 315233 transitions. [2021-05-03 13:58:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:58:56,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:58:56,861 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:58:57,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-05-03 13:58:57,061 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:58:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:58:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash 796764494, now seen corresponding path program 193 times [2021-05-03 13:58:57,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:58:57,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738744899] [2021-05-03 13:58:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:58:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:58:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738744899] [2021-05-03 13:58:57,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542015204] [2021-05-03 13:58:57,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:58:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:58:57,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:58:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:58:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:58:58,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:58:58,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:58:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532217137] [2021-05-03 13:58:58,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:58:58,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:58:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:58:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:58:58,767 INFO L87 Difference]: Start difference. First operand 135897 states and 315233 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:00,167 WARN L205 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 18 [2021-05-03 13:59:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:02,515 INFO L93 Difference]: Finished difference Result 136993 states and 317620 transitions. [2021-05-03 13:59:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 13:59:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:59:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:02,801 INFO L225 Difference]: With dead ends: 136993 [2021-05-03 13:59:02,801 INFO L226 Difference]: Without dead ends: 136959 [2021-05-03 13:59:02,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2596.9ms TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:59:02,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136959 states. [2021-05-03 13:59:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136959 to 136501. [2021-05-03 13:59:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136501 states, 136500 states have (on average 2.319919413919414) internal successors, (316669), 136500 states have internal predecessors, (316669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:05,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136501 states to 136501 states and 316669 transitions. [2021-05-03 13:59:05,393 INFO L78 Accepts]: Start accepts. Automaton has 136501 states and 316669 transitions. Word has length 44 [2021-05-03 13:59:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:05,393 INFO L480 AbstractCegarLoop]: Abstraction has 136501 states and 316669 transitions. [2021-05-03 13:59:05,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:05,393 INFO L276 IsEmpty]: Start isEmpty. Operand 136501 states and 316669 transitions. [2021-05-03 13:59:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:59:05,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:05,486 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:05,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:05,686 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:05,686 INFO L82 PathProgramCache]: Analyzing trace with hash 756047638, now seen corresponding path program 194 times [2021-05-03 13:59:05,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:05,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747633548] [2021-05-03 13:59:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747633548] [2021-05-03 13:59:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145231688] [2021-05-03 13:59:06,259 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:06,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 13:59:06,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:59:06,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:06,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:06,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 28 [2021-05-03 13:59:06,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61376838] [2021-05-03 13:59:06,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 13:59:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 13:59:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2021-05-03 13:59:06,999 INFO L87 Difference]: Start difference. First operand 136501 states and 316669 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:10,775 INFO L93 Difference]: Finished difference Result 136923 states and 317558 transitions. [2021-05-03 13:59:10,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:59:10,777 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:59:10,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:10,998 INFO L225 Difference]: With dead ends: 136923 [2021-05-03 13:59:10,999 INFO L226 Difference]: Without dead ends: 136889 [2021-05-03 13:59:10,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2046.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1501, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 13:59:11,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136889 states. [2021-05-03 13:59:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136889 to 136832. [2021-05-03 13:59:13,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136832 states, 136831 states have (on average 2.3195620875386425) internal successors, (317388), 136831 states have internal predecessors, (317388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136832 states to 136832 states and 317388 transitions. [2021-05-03 13:59:13,505 INFO L78 Accepts]: Start accepts. Automaton has 136832 states and 317388 transitions. Word has length 44 [2021-05-03 13:59:13,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:13,505 INFO L480 AbstractCegarLoop]: Abstraction has 136832 states and 317388 transitions. [2021-05-03 13:59:13,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 136832 states and 317388 transitions. [2021-05-03 13:59:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:59:13,589 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:13,589 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:13,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-03 13:59:13,789 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:13,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:13,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1158528590, now seen corresponding path program 195 times [2021-05-03 13:59:13,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:13,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837899466] [2021-05-03 13:59:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:14,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837899466] [2021-05-03 13:59:14,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868039321] [2021-05-03 13:59:14,427 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:14,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 13:59:14,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:14,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:59:14,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:15,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:15,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:59:15,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502098004] [2021-05-03 13:59:15,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:59:15,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:59:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:59:15,287 INFO L87 Difference]: Start difference. First operand 136832 states and 317388 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:21,639 INFO L93 Difference]: Finished difference Result 141699 states and 328059 transitions. [2021-05-03 13:59:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:59:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:59:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:21,921 INFO L225 Difference]: With dead ends: 141699 [2021-05-03 13:59:21,921 INFO L226 Difference]: Without dead ends: 141665 [2021-05-03 13:59:21,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2748.8ms TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 13:59:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141665 states. [2021-05-03 13:59:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141665 to 138137. [2021-05-03 13:59:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138137 states, 138136 states have (on average 2.3198876469566225) internal successors, (320460), 138136 states have internal predecessors, (320460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138137 states to 138137 states and 320460 transitions. [2021-05-03 13:59:24,527 INFO L78 Accepts]: Start accepts. Automaton has 138137 states and 320460 transitions. Word has length 44 [2021-05-03 13:59:24,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:24,527 INFO L480 AbstractCegarLoop]: Abstraction has 138137 states and 320460 transitions. [2021-05-03 13:59:24,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:24,527 INFO L276 IsEmpty]: Start isEmpty. Operand 138137 states and 320460 transitions. [2021-05-03 13:59:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:59:24,611 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:24,611 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:24,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:24,812 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash -788820612, now seen corresponding path program 196 times [2021-05-03 13:59:24,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:24,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702856624] [2021-05-03 13:59:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:25,204 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:25,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702856624] [2021-05-03 13:59:25,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659820767] [2021-05-03 13:59:25,204 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:25,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 13:59:25,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:59:25,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 13:59:26,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:26,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:59:26,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102916226] [2021-05-03 13:59:26,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:59:26,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:26,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:59:26,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:59:26,586 INFO L87 Difference]: Start difference. First operand 138137 states and 320460 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:30,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:30,819 INFO L93 Difference]: Finished difference Result 147273 states and 341086 transitions. [2021-05-03 13:59:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 13:59:30,821 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:59:30,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:31,037 INFO L225 Difference]: With dead ends: 147273 [2021-05-03 13:59:31,038 INFO L226 Difference]: Without dead ends: 147230 [2021-05-03 13:59:31,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2525.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1742, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 13:59:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147230 states. [2021-05-03 13:59:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147230 to 144496. [2021-05-03 13:59:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144496 states, 144495 states have (on average 2.3211737430360913) internal successors, (335398), 144495 states have internal predecessors, (335398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144496 states to 144496 states and 335398 transitions. [2021-05-03 13:59:33,803 INFO L78 Accepts]: Start accepts. Automaton has 144496 states and 335398 transitions. Word has length 44 [2021-05-03 13:59:33,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:33,804 INFO L480 AbstractCegarLoop]: Abstraction has 144496 states and 335398 transitions. [2021-05-03 13:59:33,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:33,804 INFO L276 IsEmpty]: Start isEmpty. Operand 144496 states and 335398 transitions. [2021-05-03 13:59:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:59:33,889 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:33,889 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:34,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:34,089 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:34,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1468482648, now seen corresponding path program 197 times [2021-05-03 13:59:34,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:34,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409350322] [2021-05-03 13:59:34,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409350322] [2021-05-03 13:59:34,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946409297] [2021-05-03 13:59:34,492 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:34,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 13:59:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:59:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:35,992 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 13:59:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:36,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:36,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-05-03 13:59:36,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740522710] [2021-05-03 13:59:36,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 13:59:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 13:59:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 13:59:36,337 INFO L87 Difference]: Start difference. First operand 144496 states and 335398 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:41,764 INFO L93 Difference]: Finished difference Result 148037 states and 343015 transitions. [2021-05-03 13:59:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 13:59:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:59:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:42,054 INFO L225 Difference]: With dead ends: 148037 [2021-05-03 13:59:42,055 INFO L226 Difference]: Without dead ends: 148020 [2021-05-03 13:59:42,055 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 3198.8ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-05-03 13:59:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148020 states. [2021-05-03 13:59:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148020 to 145235. [2021-05-03 13:59:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145235 states, 145234 states have (on average 2.321660217304488) internal successors, (337184), 145234 states have internal predecessors, (337184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145235 states to 145235 states and 337184 transitions. [2021-05-03 13:59:44,781 INFO L78 Accepts]: Start accepts. Automaton has 145235 states and 337184 transitions. Word has length 44 [2021-05-03 13:59:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:44,782 INFO L480 AbstractCegarLoop]: Abstraction has 145235 states and 337184 transitions. [2021-05-03 13:59:44,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 145235 states and 337184 transitions. [2021-05-03 13:59:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:59:45,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:45,283 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:45,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-05-03 13:59:45,483 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:45,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2050092680, now seen corresponding path program 198 times [2021-05-03 13:59:45,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:45,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360930503] [2021-05-03 13:59:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:46,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360930503] [2021-05-03 13:59:46,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592714301] [2021-05-03 13:59:46,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:46,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 13:59:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 13:59:46,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:59:46,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:47,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:47,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 13:59:47,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794355355] [2021-05-03 13:59:47,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 13:59:47,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:47,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 13:59:47,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 13:59:47,559 INFO L87 Difference]: Start difference. First operand 145235 states and 337184 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:54,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 13:59:54,714 INFO L93 Difference]: Finished difference Result 154165 states and 356569 transitions. [2021-05-03 13:59:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 13:59:54,716 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 13:59:54,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 13:59:55,047 INFO L225 Difference]: With dead ends: 154165 [2021-05-03 13:59:55,047 INFO L226 Difference]: Without dead ends: 154131 [2021-05-03 13:59:55,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2964.7ms TimeCoverageRelationStatistics Valid=164, Invalid=2188, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 13:59:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154131 states. [2021-05-03 13:59:57,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154131 to 147119. [2021-05-03 13:59:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147119 states, 147118 states have (on average 2.3230128196413764) internal successors, (341757), 147118 states have internal predecessors, (341757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147119 states to 147119 states and 341757 transitions. [2021-05-03 13:59:57,740 INFO L78 Accepts]: Start accepts. Automaton has 147119 states and 341757 transitions. Word has length 44 [2021-05-03 13:59:57,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 13:59:57,740 INFO L480 AbstractCegarLoop]: Abstraction has 147119 states and 341757 transitions. [2021-05-03 13:59:57,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 13:59:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 147119 states and 341757 transitions. [2021-05-03 13:59:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 13:59:57,831 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 13:59:57,831 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 13:59:58,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:58,031 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 13:59:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 13:59:58,031 INFO L82 PathProgramCache]: Analyzing trace with hash -951636672, now seen corresponding path program 199 times [2021-05-03 13:59:58,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 13:59:58,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014466001] [2021-05-03 13:59:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 13:59:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 13:59:58,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014466001] [2021-05-03 13:59:58,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159057868] [2021-05-03 13:59:58,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 13:59:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 13:59:58,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 13:59:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 13:59:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 13:59:59,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 13:59:59,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 13:59:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639665217] [2021-05-03 13:59:59,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 13:59:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 13:59:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 13:59:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 13:59:59,812 INFO L87 Difference]: Start difference. First operand 147119 states and 341757 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:03,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:03,294 INFO L93 Difference]: Finished difference Result 147975 states and 343601 transitions. [2021-05-03 14:00:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:00:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:00:03,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:03,644 INFO L225 Difference]: With dead ends: 147975 [2021-05-03 14:00:03,644 INFO L226 Difference]: Without dead ends: 147958 [2021-05-03 14:00:03,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1978.5ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:00:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147958 states. [2021-05-03 14:00:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147958 to 147584. [2021-05-03 14:00:06,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147584 states, 147583 states have (on average 2.323268940189588) internal successors, (342875), 147583 states have internal predecessors, (342875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147584 states to 147584 states and 342875 transitions. [2021-05-03 14:00:06,709 INFO L78 Accepts]: Start accepts. Automaton has 147584 states and 342875 transitions. Word has length 44 [2021-05-03 14:00:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:06,710 INFO L480 AbstractCegarLoop]: Abstraction has 147584 states and 342875 transitions. [2021-05-03 14:00:06,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 147584 states and 342875 transitions. [2021-05-03 14:00:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:00:06,788 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:06,788 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:07,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-03 14:00:07,004 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:07,004 INFO L82 PathProgramCache]: Analyzing trace with hash 929097336, now seen corresponding path program 200 times [2021-05-03 14:00:07,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:07,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894330511] [2021-05-03 14:00:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:07,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894330511] [2021-05-03 14:00:07,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88446052] [2021-05-03 14:00:07,736 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:07,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:00:07,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:07,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:00:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:09,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:09,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 14:00:09,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958214016] [2021-05-03 14:00:09,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:00:09,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:00:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:00:09,168 INFO L87 Difference]: Start difference. First operand 147584 states and 342875 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:15,068 INFO L93 Difference]: Finished difference Result 148649 states and 345197 transitions. [2021-05-03 14:00:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 14:00:15,071 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:00:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:15,409 INFO L225 Difference]: With dead ends: 148649 [2021-05-03 14:00:15,409 INFO L226 Difference]: Without dead ends: 148615 [2021-05-03 14:00:15,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3151.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:00:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148615 states. [2021-05-03 14:00:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148615 to 148228. [2021-05-03 14:00:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148228 states, 148227 states have (on average 2.323483575866745) internal successors, (344403), 148227 states have internal predecessors, (344403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148228 states to 148228 states and 344403 transitions. [2021-05-03 14:00:18,713 INFO L78 Accepts]: Start accepts. Automaton has 148228 states and 344403 transitions. Word has length 44 [2021-05-03 14:00:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:18,713 INFO L480 AbstractCegarLoop]: Abstraction has 148228 states and 344403 transitions. [2021-05-03 14:00:18,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 148228 states and 344403 transitions. [2021-05-03 14:00:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:00:18,819 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:18,819 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:19,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-03 14:00:19,031 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash 888380480, now seen corresponding path program 201 times [2021-05-03 14:00:19,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:19,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734348940] [2021-05-03 14:00:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:19,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734348940] [2021-05-03 14:00:19,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845889561] [2021-05-03 14:00:19,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:19,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:00:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:00:19,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:21,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:21,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 14:00:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534766514] [2021-05-03 14:00:21,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:00:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:21,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:00:21,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:00:21,245 INFO L87 Difference]: Start difference. First operand 148228 states and 344403 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:24,887 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-05-03 14:00:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:30,316 INFO L93 Difference]: Finished difference Result 153460 states and 355839 transitions. [2021-05-03 14:00:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:00:30,320 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:00:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:30,721 INFO L225 Difference]: With dead ends: 153460 [2021-05-03 14:00:30,722 INFO L226 Difference]: Without dead ends: 153426 [2021-05-03 14:00:30,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 3929.2ms TimeCoverageRelationStatistics Valid=191, Invalid=2359, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:00:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153426 states. [2021-05-03 14:00:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153426 to 149372. [2021-05-03 14:00:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149372 states, 149371 states have (on average 2.323878128954081) internal successors, (347120), 149371 states have internal predecessors, (347120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149372 states to 149372 states and 347120 transitions. [2021-05-03 14:00:34,881 INFO L78 Accepts]: Start accepts. Automaton has 149372 states and 347120 transitions. Word has length 44 [2021-05-03 14:00:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:34,881 INFO L480 AbstractCegarLoop]: Abstraction has 149372 states and 347120 transitions. [2021-05-03 14:00:34,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 149372 states and 347120 transitions. [2021-05-03 14:00:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:00:34,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:34,962 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:35,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:35,177 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:35,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1290861432, now seen corresponding path program 202 times [2021-05-03 14:00:35,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:35,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207963587] [2021-05-03 14:00:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:36,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207963587] [2021-05-03 14:00:36,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904863652] [2021-05-03 14:00:36,049 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:36,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:00:36,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:00:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:00:37,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:37,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-05-03 14:00:37,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252665186] [2021-05-03 14:00:37,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:00:37,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:37,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:00:37,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=797, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:00:37,948 INFO L87 Difference]: Start difference. First operand 149372 states and 347120 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:42,707 INFO L93 Difference]: Finished difference Result 149842 states and 348098 transitions. [2021-05-03 14:00:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:00:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:00:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:43,080 INFO L225 Difference]: With dead ends: 149842 [2021-05-03 14:00:43,080 INFO L226 Difference]: Without dead ends: 149808 [2021-05-03 14:00:43,080 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 3426.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:00:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149808 states. [2021-05-03 14:00:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149808 to 149694. [2021-05-03 14:00:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149694 states, 149693 states have (on average 2.3235555436793973) internal successors, (347820), 149693 states have internal predecessors, (347820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149694 states to 149694 states and 347820 transitions. [2021-05-03 14:00:46,891 INFO L78 Accepts]: Start accepts. Automaton has 149694 states and 347820 transitions. Word has length 44 [2021-05-03 14:00:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:46,892 INFO L480 AbstractCegarLoop]: Abstraction has 149694 states and 347820 transitions. [2021-05-03 14:00:46,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 149694 states and 347820 transitions. [2021-05-03 14:00:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:00:46,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:46,989 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:47,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 14:00:47,206 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash 610969408, now seen corresponding path program 203 times [2021-05-03 14:00:47,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:47,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563503655] [2021-05-03 14:00:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:00:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:00:47,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563503655] [2021-05-03 14:00:47,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062754806] [2021-05-03 14:00:47,933 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:47,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:00:47,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:00:47,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:00:47,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:00:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:00:49,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:00:49,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 14:00:49,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300647827] [2021-05-03 14:00:49,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:00:49,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:00:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:00:49,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:00:49,951 INFO L87 Difference]: Start difference. First operand 149694 states and 347820 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:52,133 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-05-03 14:00:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:00:55,822 INFO L93 Difference]: Finished difference Result 154647 states and 358583 transitions. [2021-05-03 14:00:55,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:00:55,827 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:00:55,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:00:56,223 INFO L225 Difference]: With dead ends: 154647 [2021-05-03 14:00:56,224 INFO L226 Difference]: Without dead ends: 154604 [2021-05-03 14:00:56,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3459.7ms TimeCoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 14:00:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154604 states. [2021-05-03 14:00:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154604 to 151953. [2021-05-03 14:00:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151953 states, 151952 states have (on average 2.3238456881120353) internal successors, (353113), 151952 states have internal predecessors, (353113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151953 states to 151953 states and 353113 transitions. [2021-05-03 14:00:59,684 INFO L78 Accepts]: Start accepts. Automaton has 151953 states and 353113 transitions. Word has length 44 [2021-05-03 14:00:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:00:59,684 INFO L480 AbstractCegarLoop]: Abstraction has 151953 states and 353113 transitions. [2021-05-03 14:00:59,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 30 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:00:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 151953 states and 353113 transitions. [2021-05-03 14:00:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:00:59,770 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:00:59,770 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:00:59,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:00:59,985 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:00:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:00:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1336149806, now seen corresponding path program 204 times [2021-05-03 14:00:59,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:00:59,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613270005] [2021-05-03 14:00:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:00:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:00,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613270005] [2021-05-03 14:01:00,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133226585] [2021-05-03 14:01:00,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:00,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:01:00,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:01:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:02,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:02,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 30 [2021-05-03 14:01:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564178441] [2021-05-03 14:01:02,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:01:02,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:02,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:01:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:01:02,921 INFO L87 Difference]: Start difference. First operand 151953 states and 353113 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:12,829 INFO L93 Difference]: Finished difference Result 162794 states and 376829 transitions. [2021-05-03 14:01:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 14:01:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:01:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:13,253 INFO L225 Difference]: With dead ends: 162794 [2021-05-03 14:01:13,253 INFO L226 Difference]: Without dead ends: 162760 [2021-05-03 14:01:13,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 4333.7ms TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:01:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162760 states. [2021-05-03 14:01:15,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162760 to 155259. [2021-05-03 14:01:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155259 states, 155258 states have (on average 2.325992863491736) internal successors, (361129), 155258 states have internal predecessors, (361129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155259 states to 155259 states and 361129 transitions. [2021-05-03 14:01:17,180 INFO L78 Accepts]: Start accepts. Automaton has 155259 states and 361129 transitions. Word has length 44 [2021-05-03 14:01:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:17,180 INFO L480 AbstractCegarLoop]: Abstraction has 155259 states and 361129 transitions. [2021-05-03 14:01:17,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 155259 states and 361129 transitions. [2021-05-03 14:01:17,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:01:17,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:17,290 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:17,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-03 14:01:17,505 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -978146052, now seen corresponding path program 205 times [2021-05-03 14:01:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:17,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249045869] [2021-05-03 14:01:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:18,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249045869] [2021-05-03 14:01:18,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648201023] [2021-05-03 14:01:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:01:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:19,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:19,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 14:01:19,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307565355] [2021-05-03 14:01:19,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:01:19,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:01:19,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:01:19,974 INFO L87 Difference]: Start difference. First operand 155259 states and 361129 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:24,164 INFO L93 Difference]: Finished difference Result 156045 states and 362832 transitions. [2021-05-03 14:01:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:01:24,178 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:01:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:25,120 INFO L225 Difference]: With dead ends: 156045 [2021-05-03 14:01:25,121 INFO L226 Difference]: Without dead ends: 156028 [2021-05-03 14:01:25,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 2977.5ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:01:25,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156028 states. [2021-05-03 14:01:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156028 to 155729. [2021-05-03 14:01:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155729 states, 155728 states have (on average 2.3262290660639064) internal successors, (362259), 155728 states have internal predecessors, (362259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155729 states to 155729 states and 362259 transitions. [2021-05-03 14:01:28,603 INFO L78 Accepts]: Start accepts. Automaton has 155729 states and 362259 transitions. Word has length 44 [2021-05-03 14:01:28,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:28,603 INFO L480 AbstractCegarLoop]: Abstraction has 155729 states and 362259 transitions. [2021-05-03 14:01:28,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:28,603 INFO L276 IsEmpty]: Start isEmpty. Operand 155729 states and 362259 transitions. [2021-05-03 14:01:28,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-03 14:01:28,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:28,712 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:28,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:28,925 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:28,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1891878054, now seen corresponding path program 206 times [2021-05-03 14:01:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:28,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047925801] [2021-05-03 14:01:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:01:29,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047925801] [2021-05-03 14:01:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902932467] [2021-05-03 14:01:29,837 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:29,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:01:29,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:29,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 14:01:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:01:31,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:31,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2021-05-03 14:01:31,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065973061] [2021-05-03 14:01:31,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:01:31,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:31,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:01:31,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:01:31,106 INFO L87 Difference]: Start difference. First operand 155729 states and 362259 transitions. Second operand has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:35,361 INFO L93 Difference]: Finished difference Result 156514 states and 363952 transitions. [2021-05-03 14:01:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:01:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-05-03 14:01:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:35,699 INFO L225 Difference]: With dead ends: 156514 [2021-05-03 14:01:35,699 INFO L226 Difference]: Without dead ends: 156497 [2021-05-03 14:01:35,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2746.6ms TimeCoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:01:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156497 states. [2021-05-03 14:01:38,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156497 to 156189. [2021-05-03 14:01:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156189 states, 156188 states have (on average 2.32645913898635) internal successors, (363365), 156188 states have internal predecessors, (363365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156189 states to 156189 states and 363365 transitions. [2021-05-03 14:01:38,787 INFO L78 Accepts]: Start accepts. Automaton has 156189 states and 363365 transitions. Word has length 44 [2021-05-03 14:01:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:38,787 INFO L480 AbstractCegarLoop]: Abstraction has 156189 states and 363365 transitions. [2021-05-03 14:01:38,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 27 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 156189 states and 363365 transitions. [2021-05-03 14:01:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:01:38,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:38,883 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:39,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-03 14:01:39,084 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1728055526, now seen corresponding path program 207 times [2021-05-03 14:01:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:39,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373427935] [2021-05-03 14:01:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:01:39,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373427935] [2021-05-03 14:01:39,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315172127] [2021-05-03 14:01:39,185 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:39,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:01:39,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:01:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:01:39,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:39,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:01:39,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123606301] [2021-05-03 14:01:39,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:01:39,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:39,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:01:39,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:01:39,546 INFO L87 Difference]: Start difference. First operand 156189 states and 363365 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:40,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:40,428 INFO L93 Difference]: Finished difference Result 158663 states and 368214 transitions. [2021-05-03 14:01:40,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:01:40,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:01:40,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:40,781 INFO L225 Difference]: With dead ends: 158663 [2021-05-03 14:01:40,781 INFO L226 Difference]: Without dead ends: 158660 [2021-05-03 14:01:40,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:01:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158660 states. [2021-05-03 14:01:43,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158660 to 156670. [2021-05-03 14:01:43,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156670 states, 156669 states have (on average 2.3263951387958053) internal successors, (364474), 156669 states have internal predecessors, (364474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156670 states to 156670 states and 364474 transitions. [2021-05-03 14:01:44,721 INFO L78 Accepts]: Start accepts. Automaton has 156670 states and 364474 transitions. Word has length 45 [2021-05-03 14:01:44,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:44,721 INFO L480 AbstractCegarLoop]: Abstraction has 156670 states and 364474 transitions. [2021-05-03 14:01:44,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:44,721 INFO L276 IsEmpty]: Start isEmpty. Operand 156670 states and 364474 transitions. [2021-05-03 14:01:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:01:44,816 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:44,816 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:45,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-05-03 14:01:45,033 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash 673568842, now seen corresponding path program 208 times [2021-05-03 14:01:45,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:45,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115482510] [2021-05-03 14:01:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:01:45,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115482510] [2021-05-03 14:01:45,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228750470] [2021-05-03 14:01:45,172 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:45,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:01:45,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:45,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:01:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 14:01:45,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:45,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:01:45,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368965931] [2021-05-03 14:01:45,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:01:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:45,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:01:45,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:01:45,564 INFO L87 Difference]: Start difference. First operand 156670 states and 364474 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:46,589 INFO L93 Difference]: Finished difference Result 183701 states and 427253 transitions. [2021-05-03 14:01:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:01:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:01:46,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:47,011 INFO L225 Difference]: With dead ends: 183701 [2021-05-03 14:01:47,011 INFO L226 Difference]: Without dead ends: 183701 [2021-05-03 14:01:47,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:01:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183701 states. [2021-05-03 14:01:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183701 to 177881. [2021-05-03 14:01:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177881 states, 177880 states have (on average 2.3365639757139647) internal successors, (415628), 177880 states have internal predecessors, (415628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177881 states to 177881 states and 415628 transitions. [2021-05-03 14:01:51,258 INFO L78 Accepts]: Start accepts. Automaton has 177881 states and 415628 transitions. Word has length 45 [2021-05-03 14:01:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:51,258 INFO L480 AbstractCegarLoop]: Abstraction has 177881 states and 415628 transitions. [2021-05-03 14:01:51,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 177881 states and 415628 transitions. [2021-05-03 14:01:51,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:01:51,359 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:51,359 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:51,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:51,560 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:51,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1350623474, now seen corresponding path program 209 times [2021-05-03 14:01:51,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:51,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54872885] [2021-05-03 14:01:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:51,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:01:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54872885] [2021-05-03 14:01:51,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177709917] [2021-05-03 14:01:51,675 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:51,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:01:51,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:01:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:01:52,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:52,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:01:52,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101761520] [2021-05-03 14:01:52,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:01:52,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:01:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:01:52,082 INFO L87 Difference]: Start difference. First operand 177881 states and 415628 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:53,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:01:53,182 INFO L93 Difference]: Finished difference Result 180381 states and 420212 transitions. [2021-05-03 14:01:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:01:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:01:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:01:54,499 INFO L225 Difference]: With dead ends: 180381 [2021-05-03 14:01:54,499 INFO L226 Difference]: Without dead ends: 180357 [2021-05-03 14:01:54,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:01:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180357 states. [2021-05-03 14:01:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180357 to 177716. [2021-05-03 14:01:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3318965759783925) internal successors, (414413), 177715 states have internal predecessors, (414413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414413 transitions. [2021-05-03 14:01:58,328 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414413 transitions. Word has length 45 [2021-05-03 14:01:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:01:58,328 INFO L480 AbstractCegarLoop]: Abstraction has 177716 states and 414413 transitions. [2021-05-03 14:01:58,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:01:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414413 transitions. [2021-05-03 14:01:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:01:58,439 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:01:58,439 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:01:58,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-05-03 14:01:58,645 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:01:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:01:58,645 INFO L82 PathProgramCache]: Analyzing trace with hash -286948982, now seen corresponding path program 210 times [2021-05-03 14:01:58,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:01:58,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611884196] [2021-05-03 14:01:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:01:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:01:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:01:58,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611884196] [2021-05-03 14:01:58,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646775932] [2021-05-03 14:01:58,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:01:58,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:01:58,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:01:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:01:58,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:01:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:01:59,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:01:59,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:01:59,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487270161] [2021-05-03 14:01:59,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:01:59,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:01:59,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:01:59,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:01:59,156 INFO L87 Difference]: Start difference. First operand 177716 states and 414413 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:01,089 INFO L93 Difference]: Finished difference Result 180087 states and 418773 transitions. [2021-05-03 14:02:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:01,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:01,443 INFO L225 Difference]: With dead ends: 180087 [2021-05-03 14:02:01,443 INFO L226 Difference]: Without dead ends: 180075 [2021-05-03 14:02:01,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:02:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180075 states. [2021-05-03 14:02:04,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180075 to 177716. [2021-05-03 14:02:04,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177716 states, 177715 states have (on average 2.3297020510367723) internal successors, (414023), 177715 states have internal predecessors, (414023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177716 states to 177716 states and 414023 transitions. [2021-05-03 14:02:05,431 INFO L78 Accepts]: Start accepts. Automaton has 177716 states and 414023 transitions. Word has length 45 [2021-05-03 14:02:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:05,431 INFO L480 AbstractCegarLoop]: Abstraction has 177716 states and 414023 transitions. [2021-05-03 14:02:05,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 177716 states and 414023 transitions. [2021-05-03 14:02:05,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:05,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:05,546 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:05,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-03 14:02:05,764 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:05,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1882064834, now seen corresponding path program 211 times [2021-05-03 14:02:05,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:05,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124341067] [2021-05-03 14:02:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:02:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124341067] [2021-05-03 14:02:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686237133] [2021-05-03 14:02:05,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:02:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 14:02:06,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:06,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:02:06,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290419994] [2021-05-03 14:02:06,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:06,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:06,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:06,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:06,303 INFO L87 Difference]: Start difference. First operand 177716 states and 414023 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:08,077 INFO L93 Difference]: Finished difference Result 193419 states and 449644 transitions. [2021-05-03 14:02:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:08,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:08,539 INFO L225 Difference]: With dead ends: 193419 [2021-05-03 14:02:08,540 INFO L226 Difference]: Without dead ends: 193419 [2021-05-03 14:02:08,540 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193419 states. [2021-05-03 14:02:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193419 to 188453. [2021-05-03 14:02:12,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188453 states, 188452 states have (on average 2.3340532337146858) internal successors, (439857), 188452 states have internal predecessors, (439857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:13,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188453 states to 188453 states and 439857 transitions. [2021-05-03 14:02:13,750 INFO L78 Accepts]: Start accepts. Automaton has 188453 states and 439857 transitions. Word has length 45 [2021-05-03 14:02:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:13,751 INFO L480 AbstractCegarLoop]: Abstraction has 188453 states and 439857 transitions. [2021-05-03 14:02:13,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 188453 states and 439857 transitions. [2021-05-03 14:02:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:13,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:13,863 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:14,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:14,073 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1205010202, now seen corresponding path program 212 times [2021-05-03 14:02:14,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:14,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917221707] [2021-05-03 14:02:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:02:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917221707] [2021-05-03 14:02:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763302142] [2021-05-03 14:02:14,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:14,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:02:14,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:02:14,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:14,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:02:14,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041122184] [2021-05-03 14:02:14,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:14,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:14,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:14,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:14,630 INFO L87 Difference]: Start difference. First operand 188453 states and 439857 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:15,743 INFO L93 Difference]: Finished difference Result 191124 states and 444736 transitions. [2021-05-03 14:02:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:02:15,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:16,197 INFO L225 Difference]: With dead ends: 191124 [2021-05-03 14:02:16,197 INFO L226 Difference]: Without dead ends: 191109 [2021-05-03 14:02:16,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:02:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191109 states. [2021-05-03 14:02:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191109 to 188396. [2021-05-03 14:02:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188396 states, 188395 states have (on average 2.3323602006422677) internal successors, (439405), 188395 states have internal predecessors, (439405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188396 states to 188396 states and 439405 transitions. [2021-05-03 14:02:21,276 INFO L78 Accepts]: Start accepts. Automaton has 188396 states and 439405 transitions. Word has length 45 [2021-05-03 14:02:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:21,276 INFO L480 AbstractCegarLoop]: Abstraction has 188396 states and 439405 transitions. [2021-05-03 14:02:21,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 188396 states and 439405 transitions. [2021-05-03 14:02:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:21,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:21,385 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:21,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-03 14:02:21,602 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1452384638, now seen corresponding path program 213 times [2021-05-03 14:02:21,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:21,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79396193] [2021-05-03 14:02:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:02:21,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79396193] [2021-05-03 14:02:21,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340443501] [2021-05-03 14:02:21,721 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:21,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:02:21,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:21,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 14:02:22,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:22,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:02:22,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515820365] [2021-05-03 14:02:22,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:02:22,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:22,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:02:22,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:22,052 INFO L87 Difference]: Start difference. First operand 188396 states and 439405 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:23,600 INFO L93 Difference]: Finished difference Result 191049 states and 444257 transitions. [2021-05-03 14:02:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:23,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:24,096 INFO L225 Difference]: With dead ends: 191049 [2021-05-03 14:02:24,096 INFO L226 Difference]: Without dead ends: 191028 [2021-05-03 14:02:24,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:02:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191028 states. [2021-05-03 14:02:27,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191028 to 176453. [2021-05-03 14:02:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176453 states, 176452 states have (on average 2.3230793643597125) internal successors, (409912), 176452 states have internal predecessors, (409912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:28,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176453 states to 176453 states and 409912 transitions. [2021-05-03 14:02:28,807 INFO L78 Accepts]: Start accepts. Automaton has 176453 states and 409912 transitions. Word has length 45 [2021-05-03 14:02:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:28,807 INFO L480 AbstractCegarLoop]: Abstraction has 176453 states and 409912 transitions. [2021-05-03 14:02:28,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 176453 states and 409912 transitions. [2021-05-03 14:02:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:28,938 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:28,938 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:29,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-03 14:02:29,139 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:29,139 INFO L82 PathProgramCache]: Analyzing trace with hash 397030818, now seen corresponding path program 214 times [2021-05-03 14:02:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:29,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430863775] [2021-05-03 14:02:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:02:29,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430863775] [2021-05-03 14:02:29,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282438974] [2021-05-03 14:02:29,306 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:29,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:02:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:29,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:02:29,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:02:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924009927] [2021-05-03 14:02:29,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:02:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:02:29,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:02:29,711 INFO L87 Difference]: Start difference. First operand 176453 states and 409912 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:31,411 INFO L93 Difference]: Finished difference Result 179004 states and 414579 transitions. [2021-05-03 14:02:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:02:31,421 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:32,107 INFO L225 Difference]: With dead ends: 179004 [2021-05-03 14:02:32,107 INFO L226 Difference]: Without dead ends: 178983 [2021-05-03 14:02:32,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:02:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178983 states. [2021-05-03 14:02:35,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178983 to 176468. [2021-05-03 14:02:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176468 states, 176467 states have (on average 2.322660894104847) internal successors, (409873), 176467 states have internal predecessors, (409873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:35,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176468 states to 176468 states and 409873 transitions. [2021-05-03 14:02:35,985 INFO L78 Accepts]: Start accepts. Automaton has 176468 states and 409873 transitions. Word has length 45 [2021-05-03 14:02:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:35,985 INFO L480 AbstractCegarLoop]: Abstraction has 176468 states and 409873 transitions. [2021-05-03 14:02:35,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 176468 states and 409873 transitions. [2021-05-03 14:02:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:36,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:36,101 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:36,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 14:02:36,320 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1822368822, now seen corresponding path program 215 times [2021-05-03 14:02:36,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:36,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922119608] [2021-05-03 14:02:36,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:02:36,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922119608] [2021-05-03 14:02:36,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390720332] [2021-05-03 14:02:36,463 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:36,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:02:36,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:36,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:36,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 14:02:37,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:37,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:02:37,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742751661] [2021-05-03 14:02:37,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:02:37,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:37,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:02:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:02:37,489 INFO L87 Difference]: Start difference. First operand 176468 states and 409873 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:38,733 INFO L93 Difference]: Finished difference Result 186893 states and 434659 transitions. [2021-05-03 14:02:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:39,183 INFO L225 Difference]: With dead ends: 186893 [2021-05-03 14:02:39,183 INFO L226 Difference]: Without dead ends: 186893 [2021-05-03 14:02:39,183 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:02:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186893 states. [2021-05-03 14:02:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186893 to 130293. [2021-05-03 14:02:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130293 states, 130292 states have (on average 2.282711141129156) internal successors, (297419), 130292 states have internal predecessors, (297419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130293 states to 130293 states and 297419 transitions. [2021-05-03 14:02:42,610 INFO L78 Accepts]: Start accepts. Automaton has 130293 states and 297419 transitions. Word has length 45 [2021-05-03 14:02:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:42,610 INFO L480 AbstractCegarLoop]: Abstraction has 130293 states and 297419 transitions. [2021-05-03 14:02:42,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 130293 states and 297419 transitions. [2021-05-03 14:02:42,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:42,704 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:42,704 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:42,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:42,923 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1440909834, now seen corresponding path program 216 times [2021-05-03 14:02:42,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:42,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062252155] [2021-05-03 14:02:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:02:43,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062252155] [2021-05-03 14:02:43,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223752577] [2021-05-03 14:02:43,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:02:43,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:02:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:43,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 14:02:43,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:43,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:02:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028978164] [2021-05-03 14:02:43,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:02:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:02:43,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:02:43,444 INFO L87 Difference]: Start difference. First operand 130293 states and 297419 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:45,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:45,110 INFO L93 Difference]: Finished difference Result 136987 states and 313402 transitions. [2021-05-03 14:02:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:45,473 INFO L225 Difference]: With dead ends: 136987 [2021-05-03 14:02:45,473 INFO L226 Difference]: Without dead ends: 136987 [2021-05-03 14:02:45,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:02:45,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136987 states. [2021-05-03 14:02:47,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136987 to 131004. [2021-05-03 14:02:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131004 states, 131003 states have (on average 2.2863369541155545) internal successors, (299517), 131003 states have internal predecessors, (299517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131004 states to 131004 states and 299517 transitions. [2021-05-03 14:02:48,399 INFO L78 Accepts]: Start accepts. Automaton has 131004 states and 299517 transitions. Word has length 45 [2021-05-03 14:02:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:48,399 INFO L480 AbstractCegarLoop]: Abstraction has 131004 states and 299517 transitions. [2021-05-03 14:02:48,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 131004 states and 299517 transitions. [2021-05-03 14:02:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:48,500 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:48,500 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:48,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-05-03 14:02:48,713 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:48,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:48,714 INFO L82 PathProgramCache]: Analyzing trace with hash 120349642, now seen corresponding path program 217 times [2021-05-03 14:02:48,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:48,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112922902] [2021-05-03 14:02:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:02:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112922902] [2021-05-03 14:02:48,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637999727] [2021-05-03 14:02:48,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:48,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:02:49,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:49,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:02:49,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802672357] [2021-05-03 14:02:49,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:49,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:49,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:49,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:49,304 INFO L87 Difference]: Start difference. First operand 131004 states and 299517 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:50,139 INFO L93 Difference]: Finished difference Result 136350 states and 310930 transitions. [2021-05-03 14:02:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:02:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:50,451 INFO L225 Difference]: With dead ends: 136350 [2021-05-03 14:02:50,451 INFO L226 Difference]: Without dead ends: 136350 [2021-05-03 14:02:50,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:02:50,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136350 states. [2021-05-03 14:02:53,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136350 to 133513. [2021-05-03 14:02:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133513 states, 133512 states have (on average 2.2889178500808915) internal successors, (305598), 133512 states have internal predecessors, (305598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:53,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133513 states to 133513 states and 305598 transitions. [2021-05-03 14:02:53,604 INFO L78 Accepts]: Start accepts. Automaton has 133513 states and 305598 transitions. Word has length 45 [2021-05-03 14:02:53,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:53,604 INFO L480 AbstractCegarLoop]: Abstraction has 133513 states and 305598 transitions. [2021-05-03 14:02:53,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 133513 states and 305598 transitions. [2021-05-03 14:02:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:53,706 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:53,706 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:53,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-03 14:02:53,921 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:53,921 INFO L82 PathProgramCache]: Analyzing trace with hash 797404274, now seen corresponding path program 218 times [2021-05-03 14:02:53,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:53,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685988124] [2021-05-03 14:02:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:02:54,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685988124] [2021-05-03 14:02:54,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955445851] [2021-05-03 14:02:54,035 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:54,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:02:54,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:54,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:02:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:02:54,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:02:54,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 14:02:54,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468746716] [2021-05-03 14:02:54,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 14:02:54,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:02:54,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 14:02:54,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-03 14:02:54,490 INFO L87 Difference]: Start difference. First operand 133513 states and 305598 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:56,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:02:56,060 INFO L93 Difference]: Finished difference Result 136108 states and 310337 transitions. [2021-05-03 14:02:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:02:56,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:02:56,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:02:56,381 INFO L225 Difference]: With dead ends: 136108 [2021-05-03 14:02:56,381 INFO L226 Difference]: Without dead ends: 136105 [2021-05-03 14:02:56,381 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:02:56,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136105 states. [2021-05-03 14:02:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136105 to 133512. [2021-05-03 14:02:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2888451138857473) internal successors, (305586), 133511 states have internal predecessors, (305586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305586 transitions. [2021-05-03 14:02:59,516 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305586 transitions. Word has length 45 [2021-05-03 14:02:59,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:02:59,517 INFO L480 AbstractCegarLoop]: Abstraction has 133512 states and 305586 transitions. [2021-05-03 14:02:59,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:02:59,517 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305586 transitions. [2021-05-03 14:02:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:02:59,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:02:59,623 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:02:59,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:59,830 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:02:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:02:59,830 INFO L82 PathProgramCache]: Analyzing trace with hash -840168182, now seen corresponding path program 219 times [2021-05-03 14:02:59,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:02:59,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981033483] [2021-05-03 14:02:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:02:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:02:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:02:59,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981033483] [2021-05-03 14:02:59,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235901599] [2021-05-03 14:02:59,944 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:02:59,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:02:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:02:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:02:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:03:00,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:00,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-05-03 14:03:00,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984327576] [2021-05-03 14:03:00,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:03:00,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:00,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:03:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:03:00,419 INFO L87 Difference]: Start difference. First operand 133512 states and 305586 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:01,337 INFO L93 Difference]: Finished difference Result 136143 states and 310391 transitions. [2021-05-03 14:03:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:03:01,340 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:03:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:01,639 INFO L225 Difference]: With dead ends: 136143 [2021-05-03 14:03:01,639 INFO L226 Difference]: Without dead ends: 136131 [2021-05-03 14:03:01,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:03:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136131 states. [2021-05-03 14:03:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136131 to 133512. [2021-05-03 14:03:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2885380230842403) internal successors, (305545), 133511 states have internal predecessors, (305545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305545 transitions. [2021-05-03 14:03:04,401 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305545 transitions. Word has length 45 [2021-05-03 14:03:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:04,402 INFO L480 AbstractCegarLoop]: Abstraction has 133512 states and 305545 transitions. [2021-05-03 14:03:04,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305545 transitions. [2021-05-03 14:03:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:03:04,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:04,495 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:04,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:04,696 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1895522002, now seen corresponding path program 220 times [2021-05-03 14:03:04,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:04,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619433735] [2021-05-03 14:03:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:04,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:03:04,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619433735] [2021-05-03 14:03:04,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313636032] [2021-05-03 14:03:04,808 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:04,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:03:04,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:03:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:03:05,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:05,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:03:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417972366] [2021-05-03 14:03:05,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:03:05,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:05,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:03:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:03:05,151 INFO L87 Difference]: Start difference. First operand 133512 states and 305545 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:06,533 INFO L93 Difference]: Finished difference Result 136170 states and 310404 transitions. [2021-05-03 14:03:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:03:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:03:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:06,786 INFO L225 Difference]: With dead ends: 136170 [2021-05-03 14:03:06,786 INFO L226 Difference]: Without dead ends: 136149 [2021-05-03 14:03:06,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:03:06,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136149 states. [2021-05-03 14:03:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136149 to 133512. [2021-05-03 14:03:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133512 states, 133511 states have (on average 2.2883582626150654) internal successors, (305521), 133511 states have internal predecessors, (305521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133512 states to 133512 states and 305521 transitions. [2021-05-03 14:03:09,571 INFO L78 Accepts]: Start accepts. Automaton has 133512 states and 305521 transitions. Word has length 45 [2021-05-03 14:03:09,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:09,571 INFO L480 AbstractCegarLoop]: Abstraction has 133512 states and 305521 transitions. [2021-05-03 14:03:09,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 133512 states and 305521 transitions. [2021-05-03 14:03:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 14:03:09,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:09,666 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:09,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:09,867 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:09,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:09,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1514400394, now seen corresponding path program 221 times [2021-05-03 14:03:09,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:09,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63079840] [2021-05-03 14:03:09,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:03:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63079840] [2021-05-03 14:03:09,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960619713] [2021-05-03 14:03:09,996 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:10,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:03:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:10,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:03:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:03:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:03:10,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:03:10,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:03:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951195309] [2021-05-03 14:03:10,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:03:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:03:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:03:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:03:10,336 INFO L87 Difference]: Start difference. First operand 133512 states and 305521 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:03:11,163 INFO L93 Difference]: Finished difference Result 136071 states and 310197 transitions. [2021-05-03 14:03:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:03:11,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-03 14:03:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:03:11,413 INFO L225 Difference]: With dead ends: 136071 [2021-05-03 14:03:11,413 INFO L226 Difference]: Without dead ends: 136039 [2021-05-03 14:03:11,413 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:03:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136039 states. [2021-05-03 14:03:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136039 to 133542. [2021-05-03 14:03:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133542 states, 133541 states have (on average 2.2882036228573996) internal successors, (305569), 133541 states have internal predecessors, (305569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133542 states to 133542 states and 305569 transitions. [2021-05-03 14:03:14,114 INFO L78 Accepts]: Start accepts. Automaton has 133542 states and 305569 transitions. Word has length 45 [2021-05-03 14:03:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:03:14,114 INFO L480 AbstractCegarLoop]: Abstraction has 133542 states and 305569 transitions. [2021-05-03 14:03:14,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:03:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 133542 states and 305569 transitions. [2021-05-03 14:03:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 14:03:14,218 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:03:14,218 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:03:14,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-05-03 14:03:14,418 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:03:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:03:14,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1961990775, now seen corresponding path program 9 times [2021-05-03 14:03:14,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:03:14,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612849656] [2021-05-03 14:03:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:03:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:03:14,850 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-05-03 14:03:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-03 14:03:14,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612849656] [2021-05-03 14:03:14,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374706048] [2021-05-03 14:03:14,864 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:03:14,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:03:14,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:03:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 14:03:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-05-03 14:03:15,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-03 14:03:15,438 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:03:15,442 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:03:15,442 INFO L202 PluginConnector]: Adding new model clever.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:03:15 BasicIcfg [2021-05-03 14:03:15,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:03:15,443 INFO L168 Benchmark]: Toolchain (without parser) took 810853.97 ms. Allocated memory was 377.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 356.6 MB in the beginning and 10.9 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-05-03 14:03:15,443 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 377.5 MB. Free memory is still 357.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:03:15,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.01 ms. Allocated memory is still 377.5 MB. Free memory was 356.5 MB in the beginning and 355.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:03:15,443 INFO L168 Benchmark]: Boogie Preprocessor took 13.24 ms. Allocated memory is still 377.5 MB. Free memory was 355.1 MB in the beginning and 354.2 MB in the end (delta: 922.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:03:15,443 INFO L168 Benchmark]: RCFGBuilder took 209.80 ms. Allocated memory is still 377.5 MB. Free memory was 354.1 MB in the beginning and 343.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-03 14:03:15,443 INFO L168 Benchmark]: TraceAbstraction took 810563.79 ms. Allocated memory was 377.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 343.3 MB in the beginning and 10.9 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. [2021-05-03 14:03:15,443 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 377.5 MB. Free memory is still 357.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.01 ms. Allocated memory is still 377.5 MB. Free memory was 356.5 MB in the beginning and 355.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.24 ms. Allocated memory is still 377.5 MB. Free memory was 355.1 MB in the beginning and 354.2 MB in the end (delta: 922.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 209.80 ms. Allocated memory is still 377.5 MB. Free memory was 354.1 MB in the beginning and 343.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 810563.79 ms. Allocated memory was 377.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 343.3 MB in the beginning and 10.9 GB in the end (delta: -10.5 GB). Peak memory consumption was 5.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 49). Cancelled while BasicCegarLoop was analyzing trace of length 48 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 15 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 810506.2ms, OverallIterations: 234, TraceHistogramMax: 6, EmptinessCheckTime: 9715.9ms, AutomataDifference: 356457.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19044 SDtfs, 39170 SDslu, 264284 SDs, 0 SdLazy, 205262 SolverSat, 4745 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91492.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13973 GetRequests, 6743 SyntacticMatches, 476 SemanticMatches, 6754 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42747 ImplicationChecksByTransitivity, 203421.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188453occurred in iteration=223, InterpolantAutomatonStates: 5616, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 241730.5ms AutomataMinimizationTime, 233 MinimizatonAttempts, 407890 StatesRemovedByMinimization, 233 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 613.3ms SsaConstructionTime, 2686.6ms SatisfiabilityAnalysisTime, 147372.7ms InterpolantComputationTime, 17772 NumberOfCodeBlocks, 17752 NumberOfCodeBlocksAsserted, 1023 NumberOfCheckSat, 17309 ConstructedInterpolants, 0 QuantifiedInterpolants, 205320 SizeOfPredicates, 963 NumberOfNonLiveVariables, 16479 ConjunctsInSsa, 4752 ConjunctsInUnsatCore, 463 InterpolantComputations, 3 PerfectInterpolantSequences, 2092/19789 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown