/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:01:35,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:01:35,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:01:36,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:01:36,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:01:36,122 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:01:36,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:01:36,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:01:36,123 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:01:36,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:01:36,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:01:36,126 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:01:36,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:01:36,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:01:36,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:01:36,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:01:36,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:01:36,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:01:36,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:01:36,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:01:36,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:01:36,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:01:36,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:01:36,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:01:36,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:01:36,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:01:36,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:01:36,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:01:36,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:01:36,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:01:36,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:01:36,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:01:36,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:01:36,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:01:36,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:01:36,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:01:36,144 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:01:36,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:01:36,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:01:36,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:01:36,394 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:01:36,409 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:01:36,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2021-07-09 18:01:36,410 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2021-07-09 18:01:36,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:01:36,454 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:01:36,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:01:36,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:01:36,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:01:36,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:01:36,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:01:36,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:01:36,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:01:36,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,486 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... [2021-07-09 18:01:36,488 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:01:36,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:01:36,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:01:36,489 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:01:36,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:01:36,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:01:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:01:36,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:01:36,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:01:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:01:36,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:01:36,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:01:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:01:36,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:01:36,566 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:01:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:01:36,566 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:01:36,567 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:01:36,774 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:01:36,775 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:01:36,776 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:01:36 BoogieIcfgContainer [2021-07-09 18:01:36,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:01:36,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:01:36,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:01:36,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:01:36,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:01:36" (1/2) ... [2021-07-09 18:01:36,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54f20239 and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:01:36, skipping insertion in model container [2021-07-09 18:01:36,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:01:36" (2/2) ... [2021-07-09 18:01:36,781 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2021-07-09 18:01:36,796 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:01:36,797 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:01:36,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:01:36,797 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:01:36,854 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:01:36,870 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:01:36,884 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:01:36,884 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:01:36,884 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:01:36,884 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:01:36,884 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:01:36,885 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:01:36,885 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:01:36,885 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:01:36,898 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-07-09 18:01:36,924 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:01:36,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:36,935 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:36,935 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:36,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:36,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2116175235, now seen corresponding path program 1 times [2021-07-09 18:01:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:36,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945885291] [2021-07-09 18:01:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:37,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:37,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945885291] [2021-07-09 18:01:37,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945885291] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:37,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:37,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:01:37,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061515523] [2021-07-09 18:01:37,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:01:37,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:01:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:01:37,102 INFO L87 Difference]: Start difference. First operand has 109 states, 108 states have (on average 2.861111111111111) internal successors, (309), 108 states have internal predecessors, (309), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 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) [2021-07-09 18:01:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:37,152 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-07-09 18:01:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:01:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 [2021-07-09 18:01:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:37,167 INFO L225 Difference]: With dead ends: 214 [2021-07-09 18:01:37,168 INFO L226 Difference]: Without dead ends: 199 [2021-07-09 18:01:37,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:01:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-09 18:01:37,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-07-09 18:01:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-07-09 18:01:37,225 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-07-09 18:01:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:37,226 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-07-09 18:01:37,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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) [2021-07-09 18:01:37,226 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-07-09 18:01:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:01:37,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:37,232 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:37,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:01:37,233 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash 655800031, now seen corresponding path program 1 times [2021-07-09 18:01:37,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:37,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991971814] [2021-07-09 18:01:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:37,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991971814] [2021-07-09 18:01:37,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991971814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:37,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290704631] [2021-07-09 18:01:37,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:01:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:37,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290704631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:37,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:37,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:01:37,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315859820] [2021-07-09 18:01:37,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:37,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:37,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:37,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:37,416 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:37,496 INFO L93 Difference]: Finished difference Result 365 states and 1020 transitions. [2021-07-09 18:01:37,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:01:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:37,500 INFO L225 Difference]: With dead ends: 365 [2021-07-09 18:01:37,500 INFO L226 Difference]: Without dead ends: 365 [2021-07-09 18:01:37,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-09 18:01:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 179. [2021-07-09 18:01:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 3.00561797752809) internal successors, (535), 178 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 535 transitions. [2021-07-09 18:01:37,510 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 535 transitions. Word has length 17 [2021-07-09 18:01:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:37,510 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 535 transitions. [2021-07-09 18:01:37,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 535 transitions. [2021-07-09 18:01:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:01:37,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:37,512 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:37,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:01:37,713 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2126444319, now seen corresponding path program 1 times [2021-07-09 18:01:37,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:37,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512012151] [2021-07-09 18:01:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:37,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:37,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512012151] [2021-07-09 18:01:37,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512012151] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:37,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:37,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:01:37,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373847956] [2021-07-09 18:01:37,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:01:37,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:01:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:01:37,757 INFO L87 Difference]: Start difference. First operand 179 states and 535 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:37,789 INFO L93 Difference]: Finished difference Result 237 states and 680 transitions. [2021-07-09 18:01:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:01:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:01:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:37,795 INFO L225 Difference]: With dead ends: 237 [2021-07-09 18:01:37,795 INFO L226 Difference]: Without dead ends: 237 [2021-07-09 18:01:37,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:01:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-07-09 18:01:37,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2021-07-09 18:01:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9893048128342246) internal successors, (559), 187 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 559 transitions. [2021-07-09 18:01:37,806 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 559 transitions. Word has length 17 [2021-07-09 18:01:37,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:37,806 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 559 transitions. [2021-07-09 18:01:37,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,806 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 559 transitions. [2021-07-09 18:01:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:01:37,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:37,808 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:37,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:01:37,808 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:37,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1369482973, now seen corresponding path program 2 times [2021-07-09 18:01:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:37,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092536270] [2021-07-09 18:01:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:37,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:37,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092536270] [2021-07-09 18:01:37,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092536270] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:37,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:37,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 18:01:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296797915] [2021-07-09 18:01:37,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:37,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:37,879 INFO L87 Difference]: Start difference. First operand 188 states and 559 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:37,907 INFO L93 Difference]: Finished difference Result 293 states and 808 transitions. [2021-07-09 18:01:37,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:01:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:37,909 INFO L225 Difference]: With dead ends: 293 [2021-07-09 18:01:37,909 INFO L226 Difference]: Without dead ends: 293 [2021-07-09 18:01:37,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-07-09 18:01:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2021-07-09 18:01:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.932515337423313) internal successors, (478), 163 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 478 transitions. [2021-07-09 18:01:37,920 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 478 transitions. Word has length 17 [2021-07-09 18:01:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:37,921 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 478 transitions. [2021-07-09 18:01:37,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 478 transitions. [2021-07-09 18:01:37,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:01:37,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:37,926 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:37,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:01:37,926 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:37,926 INFO L82 PathProgramCache]: Analyzing trace with hash 984474203, now seen corresponding path program 1 times [2021-07-09 18:01:37,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:37,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198811645] [2021-07-09 18:01:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:37,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:37,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198811645] [2021-07-09 18:01:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198811645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:37,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392260135] [2021-07-09 18:01:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:37,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-09 18:01:37,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:38,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392260135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:38,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:38,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-09 18:01:38,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711016424] [2021-07-09 18:01:38,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:38,053 INFO L87 Difference]: Start difference. First operand 164 states and 478 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:38,104 INFO L93 Difference]: Finished difference Result 348 states and 971 transitions. [2021-07-09 18:01:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:38,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:01:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:38,106 INFO L225 Difference]: With dead ends: 348 [2021-07-09 18:01:38,106 INFO L226 Difference]: Without dead ends: 348 [2021-07-09 18:01:38,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-07-09 18:01:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 170. [2021-07-09 18:01:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.964497041420118) internal successors, (501), 169 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 501 transitions. [2021-07-09 18:01:38,111 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 501 transitions. Word has length 17 [2021-07-09 18:01:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,111 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 501 transitions. [2021-07-09 18:01:38,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 501 transitions. [2021-07-09 18:01:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:01:38,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:38,113 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:38,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:38,321 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:38,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:38,321 INFO L82 PathProgramCache]: Analyzing trace with hash -427193509, now seen corresponding path program 3 times [2021-07-09 18:01:38,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:38,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381588728] [2021-07-09 18:01:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:38,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:38,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:38,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381588728] [2021-07-09 18:01:38,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381588728] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:38,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:38,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:01:38,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606370998] [2021-07-09 18:01:38,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:01:38,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:38,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:01:38,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:01:38,342 INFO L87 Difference]: Start difference. First operand 170 states and 501 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:38,378 INFO L93 Difference]: Finished difference Result 204 states and 542 transitions. [2021-07-09 18:01:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:01:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:38,380 INFO L225 Difference]: With dead ends: 204 [2021-07-09 18:01:38,380 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 18:01:38,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:38,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 18:01:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2021-07-09 18:01:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2021-07-09 18:01:38,384 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 17 [2021-07-09 18:01:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,384 INFO L482 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2021-07-09 18:01:38,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,384 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2021-07-09 18:01:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:38,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:38,384 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:38,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-09 18:01:38,385 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1972981309, now seen corresponding path program 1 times [2021-07-09 18:01:38,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:38,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558026355] [2021-07-09 18:01:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:38,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:38,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558026355] [2021-07-09 18:01:38,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558026355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:38,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535673942] [2021-07-09 18:01:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:01:38,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:38,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535673942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:38,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:38,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-07-09 18:01:38,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909116750] [2021-07-09 18:01:38,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:01:38,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:38,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:01:38,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:38,507 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:38,613 INFO L93 Difference]: Finished difference Result 284 states and 786 transitions. [2021-07-09 18:01:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:01:38,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:01:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:38,615 INFO L225 Difference]: With dead ends: 284 [2021-07-09 18:01:38,615 INFO L226 Difference]: Without dead ends: 284 [2021-07-09 18:01:38,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-07-09 18:01:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2021-07-09 18:01:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.827906976744186) internal successors, (608), 215 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 608 transitions. [2021-07-09 18:01:38,621 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 608 transitions. Word has length 19 [2021-07-09 18:01:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:38,621 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 608 transitions. [2021-07-09 18:01:38,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 608 transitions. [2021-07-09 18:01:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:38,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:38,623 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:38,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:38,839 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 179262851, now seen corresponding path program 1 times [2021-07-09 18:01:38,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:38,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641568199] [2021-07-09 18:01:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:38,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:38,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641568199] [2021-07-09 18:01:38,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641568199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:38,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717682545] [2021-07-09 18:01:38,899 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 [2021-07-09 18:01:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:01:38,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717682545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:39,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 18:01:39,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732541512] [2021-07-09 18:01:39,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:39,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:39,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:39,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:39,044 INFO L87 Difference]: Start difference. First operand 216 states and 608 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) [2021-07-09 18:01:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:39,094 INFO L93 Difference]: Finished difference Result 348 states and 985 transitions. [2021-07-09 18:01:39,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:39,094 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 [2021-07-09 18:01:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:39,096 INFO L225 Difference]: With dead ends: 348 [2021-07-09 18:01:39,097 INFO L226 Difference]: Without dead ends: 327 [2021-07-09 18:01:39,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-07-09 18:01:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 250. [2021-07-09 18:01:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.895582329317269) internal successors, (721), 249 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 721 transitions. [2021-07-09 18:01:39,105 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 721 transitions. Word has length 19 [2021-07-09 18:01:39,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:39,105 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 721 transitions. [2021-07-09 18:01:39,105 INFO L483 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) [2021-07-09 18:01:39,105 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 721 transitions. [2021-07-09 18:01:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:39,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:39,106 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:39,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:39,321 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash -701176209, now seen corresponding path program 2 times [2021-07-09 18:01:39,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:39,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486048527] [2021-07-09 18:01:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:39,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:39,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486048527] [2021-07-09 18:01:39,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486048527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825829417] [2021-07-09 18:01:39,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:39,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:39,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:39,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:01:39,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:39,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825829417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:39,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 18:01:39,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297375442] [2021-07-09 18:01:39,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:39,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:39,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:39,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:39,476 INFO L87 Difference]: Start difference. First operand 250 states and 721 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) [2021-07-09 18:01:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:39,522 INFO L93 Difference]: Finished difference Result 521 states and 1486 transitions. [2021-07-09 18:01:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:39,522 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 [2021-07-09 18:01:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:39,525 INFO L225 Difference]: With dead ends: 521 [2021-07-09 18:01:39,525 INFO L226 Difference]: Without dead ends: 500 [2021-07-09 18:01:39,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:39,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-09 18:01:39,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 290. [2021-07-09 18:01:39,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 869 transitions. [2021-07-09 18:01:39,532 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 869 transitions. Word has length 19 [2021-07-09 18:01:39,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:39,533 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 869 transitions. [2021-07-09 18:01:39,533 INFO L483 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) [2021-07-09 18:01:39,533 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 869 transitions. [2021-07-09 18:01:39,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:39,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:39,534 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:39,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:39,751 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1410387015, now seen corresponding path program 3 times [2021-07-09 18:01:39,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:39,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237771637] [2021-07-09 18:01:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:39,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:39,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:39,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237771637] [2021-07-09 18:01:39,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237771637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500362186] [2021-07-09 18:01:39,812 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 [2021-07-09 18:01:39,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:01:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:01:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:39,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500362186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:39,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:39,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 18:01:39,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265631451] [2021-07-09 18:01:39,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:39,904 INFO L87 Difference]: Start difference. First operand 290 states and 869 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) [2021-07-09 18:01:39,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:39,941 INFO L93 Difference]: Finished difference Result 528 states and 1543 transitions. [2021-07-09 18:01:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:39,942 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 [2021-07-09 18:01:39,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:39,944 INFO L225 Difference]: With dead ends: 528 [2021-07-09 18:01:39,944 INFO L226 Difference]: Without dead ends: 507 [2021-07-09 18:01:39,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-07-09 18:01:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 326. [2021-07-09 18:01:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.08) internal successors, (1001), 325 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1001 transitions. [2021-07-09 18:01:39,957 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1001 transitions. Word has length 19 [2021-07-09 18:01:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:39,957 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 1001 transitions. [2021-07-09 18:01:39,957 INFO L483 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) [2021-07-09 18:01:39,957 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1001 transitions. [2021-07-09 18:01:39,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:39,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:39,958 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:40,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:40,173 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:40,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:40,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1264041205, now seen corresponding path program 2 times [2021-07-09 18:01:40,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:40,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484978649] [2021-07-09 18:01:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:40,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484978649] [2021-07-09 18:01:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484978649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707572657] [2021-07-09 18:01:40,205 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:40,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:40,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:40,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:01:40,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:40,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707572657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:40,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 18:01:40,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135061013] [2021-07-09 18:01:40,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:40,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:40,274 INFO L87 Difference]: Start difference. First operand 326 states and 1001 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:40,376 INFO L93 Difference]: Finished difference Result 686 states and 2051 transitions. [2021-07-09 18:01:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:01:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:01:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:40,380 INFO L225 Difference]: With dead ends: 686 [2021-07-09 18:01:40,380 INFO L226 Difference]: Without dead ends: 686 [2021-07-09 18:01:40,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-07-09 18:01:40,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 370. [2021-07-09 18:01:40,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.2466124661246614) internal successors, (1198), 369 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1198 transitions. [2021-07-09 18:01:40,390 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1198 transitions. Word has length 19 [2021-07-09 18:01:40,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:40,390 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 1198 transitions. [2021-07-09 18:01:40,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,390 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1198 transitions. [2021-07-09 18:01:40,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:01:40,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:40,391 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:40,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:40,597 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:40,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1749845309, now seen corresponding path program 3 times [2021-07-09 18:01:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:40,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639903489] [2021-07-09 18:01:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:40,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:40,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639903489] [2021-07-09 18:01:40,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639903489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060256131] [2021-07-09 18:01:40,614 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:40,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:01:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:01:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:40,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060256131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:40,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:40,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 18:01:40,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484416688] [2021-07-09 18:01:40,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:40,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:40,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:40,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:40,708 INFO L87 Difference]: Start difference. First operand 370 states and 1198 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:40,798 INFO L93 Difference]: Finished difference Result 642 states and 2005 transitions. [2021-07-09 18:01:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:01:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:01:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:40,801 INFO L225 Difference]: With dead ends: 642 [2021-07-09 18:01:40,801 INFO L226 Difference]: Without dead ends: 642 [2021-07-09 18:01:40,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-09 18:01:40,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 388. [2021-07-09 18:01:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.289405684754522) internal successors, (1273), 387 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1273 transitions. [2021-07-09 18:01:40,810 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1273 transitions. Word has length 19 [2021-07-09 18:01:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:40,810 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 1273 transitions. [2021-07-09 18:01:40,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1273 transitions. [2021-07-09 18:01:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:40,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:40,811 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:41,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:01:41,026 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash 768837147, now seen corresponding path program 4 times [2021-07-09 18:01:41,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:41,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867728853] [2021-07-09 18:01:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:41,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867728853] [2021-07-09 18:01:41,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867728853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101935324] [2021-07-09 18:01:41,078 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:41,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:41,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101935324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:41,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:01:41,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861406349] [2021-07-09 18:01:41,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:41,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:41,161 INFO L87 Difference]: Start difference. First operand 388 states and 1273 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) [2021-07-09 18:01:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:41,196 INFO L93 Difference]: Finished difference Result 752 states and 2293 transitions. [2021-07-09 18:01:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:41,196 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 21 [2021-07-09 18:01:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:41,199 INFO L225 Difference]: With dead ends: 752 [2021-07-09 18:01:41,199 INFO L226 Difference]: Without dead ends: 731 [2021-07-09 18:01:41,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-07-09 18:01:41,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 468. [2021-07-09 18:01:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.278372591006424) internal successors, (1531), 467 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1531 transitions. [2021-07-09 18:01:41,228 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1531 transitions. Word has length 21 [2021-07-09 18:01:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:41,229 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1531 transitions. [2021-07-09 18:01:41,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1531 transitions. [2021-07-09 18:01:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:41,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:41,230 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:41,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,445 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:41,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1069401327, now seen corresponding path program 5 times [2021-07-09 18:01:41,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:41,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514148483] [2021-07-09 18:01:41,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:41,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514148483] [2021-07-09 18:01:41,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514148483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721784835] [2021-07-09 18:01:41,484 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 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 [2021-07-09 18:01:41,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:41,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:41,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721784835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:41,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:01:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751600611] [2021-07-09 18:01:41,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:41,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:41,570 INFO L87 Difference]: Start difference. First operand 468 states and 1531 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) [2021-07-09 18:01:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:41,609 INFO L93 Difference]: Finished difference Result 738 states and 2318 transitions. [2021-07-09 18:01:41,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:41,610 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 21 [2021-07-09 18:01:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:41,613 INFO L225 Difference]: With dead ends: 738 [2021-07-09 18:01:41,613 INFO L226 Difference]: Without dead ends: 717 [2021-07-09 18:01:41,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-09 18:01:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 485. [2021-07-09 18:01:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.3161157024793386) internal successors, (1605), 484 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1605 transitions. [2021-07-09 18:01:41,624 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1605 transitions. Word has length 21 [2021-07-09 18:01:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:41,624 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1605 transitions. [2021-07-09 18:01:41,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1605 transitions. [2021-07-09 18:01:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:41,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:41,626 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:41,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,843 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:41,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:41,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1991189035, now seen corresponding path program 6 times [2021-07-09 18:01:41,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:41,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165729260] [2021-07-09 18:01:41,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:41,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165729260] [2021-07-09 18:01:41,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165729260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93407657] [2021-07-09 18:01:41,895 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:41,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:41,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93407657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:41,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:41,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:01:41,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088437906] [2021-07-09 18:01:41,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:41,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:41,970 INFO L87 Difference]: Start difference. First operand 485 states and 1605 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) [2021-07-09 18:01:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:42,010 INFO L93 Difference]: Finished difference Result 608 states and 1958 transitions. [2021-07-09 18:01:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:42,010 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 21 [2021-07-09 18:01:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:42,013 INFO L225 Difference]: With dead ends: 608 [2021-07-09 18:01:42,013 INFO L226 Difference]: Without dead ends: 587 [2021-07-09 18:01:42,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-07-09 18:01:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 495. [2021-07-09 18:01:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.3238866396761133) internal successors, (1642), 494 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1642 transitions. [2021-07-09 18:01:42,024 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1642 transitions. Word has length 21 [2021-07-09 18:01:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:42,024 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1642 transitions. [2021-07-09 18:01:42,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,024 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1642 transitions. [2021-07-09 18:01:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:42,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:42,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:42,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:01:42,242 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:42,242 INFO L82 PathProgramCache]: Analyzing trace with hash -239271515, now seen corresponding path program 4 times [2021-07-09 18:01:42,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:42,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491058314] [2021-07-09 18:01:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:42,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491058314] [2021-07-09 18:01:42,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491058314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:42,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187851975] [2021-07-09 18:01:42,272 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:42,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:42,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:42,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:01:42,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:42,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187851975] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:42,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:01:42,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-07-09 18:01:42,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279140755] [2021-07-09 18:01:42,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:01:42,345 INFO L87 Difference]: Start difference. First operand 495 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:42,412 INFO L93 Difference]: Finished difference Result 728 states and 2245 transitions. [2021-07-09 18:01:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:01:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:42,416 INFO L225 Difference]: With dead ends: 728 [2021-07-09 18:01:42,416 INFO L226 Difference]: Without dead ends: 696 [2021-07-09 18:01:42,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-07-09 18:01:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 583. [2021-07-09 18:01:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.261168384879725) internal successors, (1898), 582 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1898 transitions. [2021-07-09 18:01:42,432 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1898 transitions. Word has length 21 [2021-07-09 18:01:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:42,433 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1898 transitions. [2021-07-09 18:01:42,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1898 transitions. [2021-07-09 18:01:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:42,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:42,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:42,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:01:42,634 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:42,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:42,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2124383007, now seen corresponding path program 5 times [2021-07-09 18:01:42,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:42,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473986631] [2021-07-09 18:01:42,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:42,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:42,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473986631] [2021-07-09 18:01:42,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473986631] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:42,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:01:42,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:01:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30038572] [2021-07-09 18:01:42,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:42,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:42,653 INFO L87 Difference]: Start difference. First operand 583 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:42,670 INFO L93 Difference]: Finished difference Result 673 states and 2107 transitions. [2021-07-09 18:01:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:01:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:42,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:42,673 INFO L225 Difference]: With dead ends: 673 [2021-07-09 18:01:42,673 INFO L226 Difference]: Without dead ends: 625 [2021-07-09 18:01:42,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:01:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-07-09 18:01:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 529. [2021-07-09 18:01:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.2556818181818183) internal successors, (1719), 528 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1719 transitions. [2021-07-09 18:01:42,684 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1719 transitions. Word has length 21 [2021-07-09 18:01:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:42,684 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1719 transitions. [2021-07-09 18:01:42,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1719 transitions. [2021-07-09 18:01:42,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:42,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:42,685 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:42,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-09 18:01:42,686 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:42,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1743968741, now seen corresponding path program 6 times [2021-07-09 18:01:42,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:42,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39183823] [2021-07-09 18:01:42,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:42,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39183823] [2021-07-09 18:01:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39183823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997259858] [2021-07-09 18:01:42,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:42,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:01:42,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:42,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:01:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:42,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997259858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:42,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:42,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-09 18:01:42,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043630285] [2021-07-09 18:01:42,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:42,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:42,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:42,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:42,754 INFO L87 Difference]: Start difference. First operand 529 states and 1719 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:42,819 INFO L93 Difference]: Finished difference Result 834 states and 2517 transitions. [2021-07-09 18:01:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:01:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:42,823 INFO L225 Difference]: With dead ends: 834 [2021-07-09 18:01:42,823 INFO L226 Difference]: Without dead ends: 804 [2021-07-09 18:01:42,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:01:42,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-07-09 18:01:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 598. [2021-07-09 18:01:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2981574539363483) internal successors, (1969), 597 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1969 transitions. [2021-07-09 18:01:42,835 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1969 transitions. Word has length 21 [2021-07-09 18:01:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:42,836 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1969 transitions. [2021-07-09 18:01:42,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1969 transitions. [2021-07-09 18:01:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:42,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:42,837 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:43,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-09 18:01:43,047 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash 685016161, now seen corresponding path program 7 times [2021-07-09 18:01:43,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:43,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889658453] [2021-07-09 18:01:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:43,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889658453] [2021-07-09 18:01:43,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889658453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951917265] [2021-07-09 18:01:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:43,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:01:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:43,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951917265] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:01:43,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 18:01:43,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-07-09 18:01:43,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301310779] [2021-07-09 18:01:43,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:01:43,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:43,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:01:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:43,145 INFO L87 Difference]: Start difference. First operand 598 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:43,194 INFO L93 Difference]: Finished difference Result 790 states and 2403 transitions. [2021-07-09 18:01:43,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:01:43,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:43,198 INFO L225 Difference]: With dead ends: 790 [2021-07-09 18:01:43,198 INFO L226 Difference]: Without dead ends: 782 [2021-07-09 18:01:43,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:01:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-07-09 18:01:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 591. [2021-07-09 18:01:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2711864406779663) internal successors, (1930), 590 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1930 transitions. [2021-07-09 18:01:43,224 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1930 transitions. Word has length 21 [2021-07-09 18:01:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:43,224 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1930 transitions. [2021-07-09 18:01:43,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1930 transitions. [2021-07-09 18:01:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:43,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:43,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:43,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,443 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:43,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:43,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1433719009, now seen corresponding path program 8 times [2021-07-09 18:01:43,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:43,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932469876] [2021-07-09 18:01:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:43,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932469876] [2021-07-09 18:01:43,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932469876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076838082] [2021-07-09 18:01:43,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:43,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:43,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076838082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:43,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-09 18:01:43,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987663849] [2021-07-09 18:01:43,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:43,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:43,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:43,559 INFO L87 Difference]: Start difference. First operand 591 states and 1930 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:43,684 INFO L93 Difference]: Finished difference Result 768 states and 2356 transitions. [2021-07-09 18:01:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:01:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:43,688 INFO L225 Difference]: With dead ends: 768 [2021-07-09 18:01:43,688 INFO L226 Difference]: Without dead ends: 732 [2021-07-09 18:01:43,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:01:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-07-09 18:01:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 589. [2021-07-09 18:01:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-07-09 18:01:43,703 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-07-09 18:01:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:43,703 INFO L482 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-07-09 18:01:43,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-07-09 18:01:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:43,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:43,705 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:43,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,921 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1263605021, now seen corresponding path program 9 times [2021-07-09 18:01:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:43,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016184451] [2021-07-09 18:01:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:43,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:43,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016184451] [2021-07-09 18:01:43,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016184451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:43,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127891202] [2021-07-09 18:01:43,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:43,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:43,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:43,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:43,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:44,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:44,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127891202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:44,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:44,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:01:44,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861489284] [2021-07-09 18:01:44,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:44,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:44,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:44,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:44,019 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:44,133 INFO L93 Difference]: Finished difference Result 1001 states and 3072 transitions. [2021-07-09 18:01:44,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:01:44,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:44,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:44,137 INFO L225 Difference]: With dead ends: 1001 [2021-07-09 18:01:44,137 INFO L226 Difference]: Without dead ends: 987 [2021-07-09 18:01:44,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:44,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-07-09 18:01:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 737. [2021-07-09 18:01:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2880434782608696) internal successors, (2420), 736 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2420 transitions. [2021-07-09 18:01:44,151 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2420 transitions. Word has length 21 [2021-07-09 18:01:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:44,152 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2420 transitions. [2021-07-09 18:01:44,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2420 transitions. [2021-07-09 18:01:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:44,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:44,153 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:44,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:44,365 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:44,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:44,365 INFO L82 PathProgramCache]: Analyzing trace with hash -585994983, now seen corresponding path program 10 times [2021-07-09 18:01:44,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:44,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387302585] [2021-07-09 18:01:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:44,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387302585] [2021-07-09 18:01:44,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387302585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:44,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18455463] [2021-07-09 18:01:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:44,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:44,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:44,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:44,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18455463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:44,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:44,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:01:44,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885459084] [2021-07-09 18:01:44,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:44,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:44,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:44,473 INFO L87 Difference]: Start difference. First operand 737 states and 2420 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:44,570 INFO L93 Difference]: Finished difference Result 1120 states and 3472 transitions. [2021-07-09 18:01:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:44,575 INFO L225 Difference]: With dead ends: 1120 [2021-07-09 18:01:44,575 INFO L226 Difference]: Without dead ends: 1120 [2021-07-09 18:01:44,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-09 18:01:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 810. [2021-07-09 18:01:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3325092707045734) internal successors, (2696), 809 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2696 transitions. [2021-07-09 18:01:44,591 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2696 transitions. Word has length 21 [2021-07-09 18:01:44,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:44,591 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2696 transitions. [2021-07-09 18:01:44,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2696 transitions. [2021-07-09 18:01:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:44,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:44,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:44,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:01:44,809 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:44,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:44,809 INFO L82 PathProgramCache]: Analyzing trace with hash -245591027, now seen corresponding path program 11 times [2021-07-09 18:01:44,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:44,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553191559] [2021-07-09 18:01:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:44,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553191559] [2021-07-09 18:01:44,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553191559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:44,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195332787] [2021-07-09 18:01:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:44,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:44,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195332787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:44,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:44,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-09 18:01:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298887563] [2021-07-09 18:01:44,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:44,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:44,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:44,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:44,913 INFO L87 Difference]: Start difference. First operand 810 states and 2696 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:44,986 INFO L93 Difference]: Finished difference Result 1340 states and 4210 transitions. [2021-07-09 18:01:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:01:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:44,991 INFO L225 Difference]: With dead ends: 1340 [2021-07-09 18:01:44,992 INFO L226 Difference]: Without dead ends: 1332 [2021-07-09 18:01:44,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:44,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-09 18:01:45,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 992. [2021-07-09 18:01:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.375378405650858) internal successors, (3345), 991 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3345 transitions. [2021-07-09 18:01:45,013 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3345 transitions. Word has length 21 [2021-07-09 18:01:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:45,013 INFO L482 AbstractCegarLoop]: Abstraction has 992 states and 3345 transitions. [2021-07-09 18:01:45,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3345 transitions. [2021-07-09 18:01:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:45,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:45,015 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:45,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:01:45,225 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:45,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:45,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1657258739, now seen corresponding path program 12 times [2021-07-09 18:01:45,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:45,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714867595] [2021-07-09 18:01:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:45,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:45,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714867595] [2021-07-09 18:01:45,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714867595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912652586] [2021-07-09 18:01:45,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:45,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:45,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:45,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:45,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912652586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:45,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:45,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 18:01:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705861260] [2021-07-09 18:01:45,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:01:45,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:01:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:45,358 INFO L87 Difference]: Start difference. First operand 992 states and 3345 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:45,496 INFO L93 Difference]: Finished difference Result 1623 states and 5234 transitions. [2021-07-09 18:01:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:01:45,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:45,514 INFO L225 Difference]: With dead ends: 1623 [2021-07-09 18:01:45,515 INFO L226 Difference]: Without dead ends: 1615 [2021-07-09 18:01:45,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:01:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-07-09 18:01:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1215. [2021-07-09 18:01:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.383031301482702) internal successors, (4107), 1214 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 4107 transitions. [2021-07-09 18:01:45,538 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 4107 transitions. Word has length 21 [2021-07-09 18:01:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:45,539 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 4107 transitions. [2021-07-09 18:01:45,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 4107 transitions. [2021-07-09 18:01:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:45,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:45,541 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:45,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:01:45,758 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash -372466675, now seen corresponding path program 13 times [2021-07-09 18:01:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:45,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264169911] [2021-07-09 18:01:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:45,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:45,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264169911] [2021-07-09 18:01:45,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264169911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:45,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307796528] [2021-07-09 18:01:45,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:45,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:45,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307796528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:45,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:45,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-09 18:01:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725885367] [2021-07-09 18:01:45,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:45,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:45,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:45,856 INFO L87 Difference]: Start difference. First operand 1215 states and 4107 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:45,948 INFO L93 Difference]: Finished difference Result 1527 states and 4890 transitions. [2021-07-09 18:01:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:45,952 INFO L225 Difference]: With dead ends: 1527 [2021-07-09 18:01:45,952 INFO L226 Difference]: Without dead ends: 1515 [2021-07-09 18:01:45,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-07-09 18:01:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1211. [2021-07-09 18:01:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3826446280991735) internal successors, (4093), 1210 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4093 transitions. [2021-07-09 18:01:45,977 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4093 transitions. Word has length 21 [2021-07-09 18:01:45,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:45,977 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 4093 transitions. [2021-07-09 18:01:45,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:45,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4093 transitions. [2021-07-09 18:01:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:45,979 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:45,979 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:46,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:01:46,197 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash 655355345, now seen corresponding path program 14 times [2021-07-09 18:01:46,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:46,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559790233] [2021-07-09 18:01:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:46,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:46,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559790233] [2021-07-09 18:01:46,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559790233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427178596] [2021-07-09 18:01:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:01:46,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:46,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:46,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:46,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427178596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:46,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-07-09 18:01:46,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633548600] [2021-07-09 18:01:46,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:01:46,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:46,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:01:46,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:46,304 INFO L87 Difference]: Start difference. First operand 1211 states and 4093 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:46,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:46,481 INFO L93 Difference]: Finished difference Result 2197 states and 7082 transitions. [2021-07-09 18:01:46,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:46,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:46,487 INFO L225 Difference]: With dead ends: 2197 [2021-07-09 18:01:46,487 INFO L226 Difference]: Without dead ends: 2197 [2021-07-09 18:01:46,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-07-09 18:01:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1448. [2021-07-09 18:01:46,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.4457498272287492) internal successors, (4986), 1447 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:46,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4986 transitions. [2021-07-09 18:01:46,514 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4986 transitions. Word has length 21 [2021-07-09 18:01:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:46,514 INFO L482 AbstractCegarLoop]: Abstraction has 1448 states and 4986 transitions. [2021-07-09 18:01:46,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4986 transitions. [2021-07-09 18:01:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:46,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:46,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:46,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 18:01:46,733 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:46,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:46,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2086226193, now seen corresponding path program 15 times [2021-07-09 18:01:46,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:46,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066431743] [2021-07-09 18:01:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:46,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066431743] [2021-07-09 18:01:46,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066431743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672853593] [2021-07-09 18:01:46,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:01:46,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:01:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-09 18:01:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:46,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672853593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:46,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:46,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-07-09 18:01:46,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652396677] [2021-07-09 18:01:46,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:01:46,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:01:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:01:46,826 INFO L87 Difference]: Start difference. First operand 1448 states and 4986 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:46,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:46,994 INFO L93 Difference]: Finished difference Result 1739 states and 5729 transitions. [2021-07-09 18:01:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-09 18:01:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:46,998 INFO L225 Difference]: With dead ends: 1739 [2021-07-09 18:01:46,998 INFO L226 Difference]: Without dead ends: 1693 [2021-07-09 18:01:46,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:46,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-07-09 18:01:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1505. [2021-07-09 18:01:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.4095744680851063) internal successors, (5128), 1504 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5128 transitions. [2021-07-09 18:01:47,022 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5128 transitions. Word has length 21 [2021-07-09 18:01:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:47,022 INFO L482 AbstractCegarLoop]: Abstraction has 1505 states and 5128 transitions. [2021-07-09 18:01:47,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5128 transitions. [2021-07-09 18:01:47,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:47,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:47,025 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:47,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:47,241 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1917770029, now seen corresponding path program 7 times [2021-07-09 18:01:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:47,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161524887] [2021-07-09 18:01:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:47,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:47,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161524887] [2021-07-09 18:01:47,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161524887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:47,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997905798] [2021-07-09 18:01:47,293 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 [2021-07-09 18:01:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:47,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997905798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:47,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:47,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:01:47,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478408317] [2021-07-09 18:01:47,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:47,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:47,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:47,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:47,353 INFO L87 Difference]: Start difference. First operand 1505 states and 5128 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) [2021-07-09 18:01:47,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:47,393 INFO L93 Difference]: Finished difference Result 1808 states and 5991 transitions. [2021-07-09 18:01:47,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:47,393 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 21 [2021-07-09 18:01:47,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:47,397 INFO L225 Difference]: With dead ends: 1808 [2021-07-09 18:01:47,397 INFO L226 Difference]: Without dead ends: 1787 [2021-07-09 18:01:47,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-07-09 18:01:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1518. [2021-07-09 18:01:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4225444957152273) internal successors, (5192), 1517 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5192 transitions. [2021-07-09 18:01:47,427 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5192 transitions. Word has length 21 [2021-07-09 18:01:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:47,427 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5192 transitions. [2021-07-09 18:01:47,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5192 transitions. [2021-07-09 18:01:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:47,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:47,430 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:47,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:01:47,641 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1455409559, now seen corresponding path program 8 times [2021-07-09 18:01:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:47,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979644449] [2021-07-09 18:01:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:47,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:47,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979644449] [2021-07-09 18:01:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979644449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:47,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626739140] [2021-07-09 18:01:47,690 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 [2021-07-09 18:01:47,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:47,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626739140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:47,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:47,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:01:47,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006089497] [2021-07-09 18:01:47,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:47,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:47,751 INFO L87 Difference]: Start difference. First operand 1518 states and 5192 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) [2021-07-09 18:01:47,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:47,807 INFO L93 Difference]: Finished difference Result 1722 states and 5770 transitions. [2021-07-09 18:01:47,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:47,807 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 21 [2021-07-09 18:01:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:47,811 INFO L225 Difference]: With dead ends: 1722 [2021-07-09 18:01:47,811 INFO L226 Difference]: Without dead ends: 1701 [2021-07-09 18:01:47,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-07-09 18:01:47,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1528. [2021-07-09 18:01:47,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.4282907662082516) internal successors, (5235), 1527 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5235 transitions. [2021-07-09 18:01:47,840 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5235 transitions. Word has length 21 [2021-07-09 18:01:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:47,840 INFO L482 AbstractCegarLoop]: Abstraction has 1528 states and 5235 transitions. [2021-07-09 18:01:47,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5235 transitions. [2021-07-09 18:01:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:01:47,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:47,842 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:48,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:01:48,058 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash -355017005, now seen corresponding path program 9 times [2021-07-09 18:01:48,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:48,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843379401] [2021-07-09 18:01:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:48,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843379401] [2021-07-09 18:01:48,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843379401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622280680] [2021-07-09 18:01:48,131 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:48,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:48,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:48,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:01:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:01:48,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622280680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:48,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:01:48,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939360601] [2021-07-09 18:01:48,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:01:48,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:01:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:48,192 INFO L87 Difference]: Start difference. First operand 1528 states and 5235 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) [2021-07-09 18:01:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:48,239 INFO L93 Difference]: Finished difference Result 1802 states and 6001 transitions. [2021-07-09 18:01:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:01:48,239 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 21 [2021-07-09 18:01:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:48,243 INFO L225 Difference]: With dead ends: 1802 [2021-07-09 18:01:48,243 INFO L226 Difference]: Without dead ends: 1781 [2021-07-09 18:01:48,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:01:48,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-07-09 18:01:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1544. [2021-07-09 18:01:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.436811406351264) internal successors, (5303), 1543 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5303 transitions. [2021-07-09 18:01:48,277 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5303 transitions. Word has length 21 [2021-07-09 18:01:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:48,277 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5303 transitions. [2021-07-09 18:01:48,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5303 transitions. [2021-07-09 18:01:48,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:48,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:48,280 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:48,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:48,496 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash -343789315, now seen corresponding path program 10 times [2021-07-09 18:01:48,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:48,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959919759] [2021-07-09 18:01:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:48,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:48,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959919759] [2021-07-09 18:01:48,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959919759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050822854] [2021-07-09 18:01:48,539 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:48,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:48,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:48,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050822854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:48,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:48,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:01:48,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040483455] [2021-07-09 18:01:48,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:01:48,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:48,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:01:48,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:48,620 INFO L87 Difference]: Start difference. First operand 1544 states and 5303 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:48,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:48,788 INFO L93 Difference]: Finished difference Result 4383 states and 14962 transitions. [2021-07-09 18:01:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:01:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:48,799 INFO L225 Difference]: With dead ends: 4383 [2021-07-09 18:01:48,799 INFO L226 Difference]: Without dead ends: 4383 [2021-07-09 18:01:48,800 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:01:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-07-09 18:01:48,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 2776. [2021-07-09 18:01:48,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.546666666666667) internal successors, (9842), 2775 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 9842 transitions. [2021-07-09 18:01:48,883 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 9842 transitions. Word has length 23 [2021-07-09 18:01:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:48,883 INFO L482 AbstractCegarLoop]: Abstraction has 2776 states and 9842 transitions. [2021-07-09 18:01:48,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 9842 transitions. [2021-07-09 18:01:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:48,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:48,888 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:49,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:49,097 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1351897977, now seen corresponding path program 1 times [2021-07-09 18:01:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:49,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112610440] [2021-07-09 18:01:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:49,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112610440] [2021-07-09 18:01:49,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112610440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:49,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105775059] [2021-07-09 18:01:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:49,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:49,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:49,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105775059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:49,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:49,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:01:49,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174916831] [2021-07-09 18:01:49,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:01:49,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:01:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:49,204 INFO L87 Difference]: Start difference. First operand 2776 states and 9842 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:49,382 INFO L93 Difference]: Finished difference Result 6576 states and 23416 transitions. [2021-07-09 18:01:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:01:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:49,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:49,401 INFO L225 Difference]: With dead ends: 6576 [2021-07-09 18:01:49,401 INFO L226 Difference]: Without dead ends: 6576 [2021-07-09 18:01:49,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:01:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-07-09 18:01:49,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4642. [2021-07-09 18:01:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 3.6181857358327947) internal successors, (16792), 4641 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 16792 transitions. [2021-07-09 18:01:49,538 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 16792 transitions. Word has length 23 [2021-07-09 18:01:49,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:49,538 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 16792 transitions. [2021-07-09 18:01:49,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:49,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 16792 transitions. [2021-07-09 18:01:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:49,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:49,548 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:49,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-07-09 18:01:49,766 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:49,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1067499911, now seen corresponding path program 11 times [2021-07-09 18:01:49,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:49,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535995427] [2021-07-09 18:01:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:49,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:49,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535995427] [2021-07-09 18:01:49,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535995427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:49,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70552888] [2021-07-09 18:01:49,792 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) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:49,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:01:49,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:49,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70552888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:49,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:49,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:01:49,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791614944] [2021-07-09 18:01:49,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:01:49,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:49,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:01:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:49,876 INFO L87 Difference]: Start difference. First operand 4642 states and 16792 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:50,030 INFO L93 Difference]: Finished difference Result 6297 states and 22107 transitions. [2021-07-09 18:01:50,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:50,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:50,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:50,044 INFO L225 Difference]: With dead ends: 6297 [2021-07-09 18:01:50,044 INFO L226 Difference]: Without dead ends: 6289 [2021-07-09 18:01:50,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 77.8ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-07-09 18:01:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5484. [2021-07-09 18:01:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 3.6122560641984314) internal successors, (19806), 5483 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 19806 transitions. [2021-07-09 18:01:50,164 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 19806 transitions. Word has length 23 [2021-07-09 18:01:50,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:50,164 INFO L482 AbstractCegarLoop]: Abstraction has 5484 states and 19806 transitions. [2021-07-09 18:01:50,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,164 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 19806 transitions. [2021-07-09 18:01:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:50,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:50,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:50,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:50,392 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1815799673, now seen corresponding path program 2 times [2021-07-09 18:01:50,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:50,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887755084] [2021-07-09 18:01:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:50,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887755084] [2021-07-09 18:01:50,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887755084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420224032] [2021-07-09 18:01:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:50,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:50,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:50,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420224032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:50,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:50,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:01:50,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523976198] [2021-07-09 18:01:50,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:01:50,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:01:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:50,509 INFO L87 Difference]: Start difference. First operand 5484 states and 19806 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:50,758 INFO L93 Difference]: Finished difference Result 8906 states and 31694 transitions. [2021-07-09 18:01:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:01:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:50,777 INFO L225 Difference]: With dead ends: 8906 [2021-07-09 18:01:50,777 INFO L226 Difference]: Without dead ends: 8900 [2021-07-09 18:01:50,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:01:50,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-07-09 18:01:50,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8072. [2021-07-09 18:01:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.62644034196506) internal successors, (29269), 8071 states have internal predecessors, (29269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 29269 transitions. [2021-07-09 18:01:50,942 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 29269 transitions. Word has length 23 [2021-07-09 18:01:50,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:50,942 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 29269 transitions. [2021-07-09 18:01:50,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:50,943 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 29269 transitions. [2021-07-09 18:01:50,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:50,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:50,959 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:51,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-07-09 18:01:51,173 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1500610179, now seen corresponding path program 3 times [2021-07-09 18:01:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:51,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260554038] [2021-07-09 18:01:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:51,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260554038] [2021-07-09 18:01:51,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260554038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:51,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210022077] [2021-07-09 18:01:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:51,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:01:51,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:51,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:51,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:51,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210022077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:51,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:51,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:01:51,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571814541] [2021-07-09 18:01:51,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:01:51,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:51,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:01:51,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:51,337 INFO L87 Difference]: Start difference. First operand 8072 states and 29269 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:51,539 INFO L93 Difference]: Finished difference Result 12359 states and 43995 transitions. [2021-07-09 18:01:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:51,571 INFO L225 Difference]: With dead ends: 12359 [2021-07-09 18:01:51,572 INFO L226 Difference]: Without dead ends: 12359 [2021-07-09 18:01:51,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2021-07-09 18:01:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 11076. [2021-07-09 18:01:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11076 states, 11075 states have (on average 3.61941309255079) internal successors, (40085), 11075 states have internal predecessors, (40085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11076 states to 11076 states and 40085 transitions. [2021-07-09 18:01:51,903 INFO L78 Accepts]: Start accepts. Automaton has 11076 states and 40085 transitions. Word has length 23 [2021-07-09 18:01:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:51,903 INFO L482 AbstractCegarLoop]: Abstraction has 11076 states and 40085 transitions. [2021-07-09 18:01:51,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:51,904 INFO L276 IsEmpty]: Start isEmpty. Operand 11076 states and 40085 transitions. [2021-07-09 18:01:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:51,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:51,924 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:52,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:52,141 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1194375559, now seen corresponding path program 12 times [2021-07-09 18:01:52,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:52,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787137693] [2021-07-09 18:01:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:52,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:52,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787137693] [2021-07-09 18:01:52,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787137693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:52,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507897179] [2021-07-09 18:01:52,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:52,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:01:52,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:52,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507897179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:52,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:52,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:01:52,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502970225] [2021-07-09 18:01:52,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:01:52,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:52,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:01:52,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:52,245 INFO L87 Difference]: Start difference. First operand 11076 states and 40085 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:52,470 INFO L93 Difference]: Finished difference Result 11482 states and 41093 transitions. [2021-07-09 18:01:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:01:52,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:52,496 INFO L225 Difference]: With dead ends: 11482 [2021-07-09 18:01:52,496 INFO L226 Difference]: Without dead ends: 11472 [2021-07-09 18:01:52,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-07-09 18:01:52,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 11074. [2021-07-09 18:01:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11074 states, 11073 states have (on average 3.6193443511243566) internal successors, (40077), 11073 states have internal predecessors, (40077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11074 states to 11074 states and 40077 transitions. [2021-07-09 18:01:52,792 INFO L78 Accepts]: Start accepts. Automaton has 11074 states and 40077 transitions. Word has length 23 [2021-07-09 18:01:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:52,792 INFO L482 AbstractCegarLoop]: Abstraction has 11074 states and 40077 transitions. [2021-07-09 18:01:52,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 11074 states and 40077 transitions. [2021-07-09 18:01:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:52,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:52,887 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:53,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:01:53,087 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 713885521, now seen corresponding path program 4 times [2021-07-09 18:01:53,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:53,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761193135] [2021-07-09 18:01:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:53,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761193135] [2021-07-09 18:01:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761193135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069012084] [2021-07-09 18:01:53,119 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:53,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:53,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:53,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069012084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:53,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:53,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:01:53,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607499420] [2021-07-09 18:01:53,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:01:53,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:01:53,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:53,221 INFO L87 Difference]: Start difference. First operand 11074 states and 40077 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:53,541 INFO L93 Difference]: Finished difference Result 16493 states and 59103 transitions. [2021-07-09 18:01:53,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:01:53,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:53,601 INFO L225 Difference]: With dead ends: 16493 [2021-07-09 18:01:53,602 INFO L226 Difference]: Without dead ends: 16493 [2021-07-09 18:01:53,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:01:53,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2021-07-09 18:01:53,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 7965. [2021-07-09 18:01:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.605474635861376) internal successors, (28714), 7964 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 28714 transitions. [2021-07-09 18:01:53,833 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 28714 transitions. Word has length 23 [2021-07-09 18:01:53,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:53,833 INFO L482 AbstractCegarLoop]: Abstraction has 7965 states and 28714 transitions. [2021-07-09 18:01:53,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:53,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 28714 transitions. [2021-07-09 18:01:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:53,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:53,850 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:54,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 18:01:54,069 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:54,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:54,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1264317309, now seen corresponding path program 13 times [2021-07-09 18:01:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:54,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087638444] [2021-07-09 18:01:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:54,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:54,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087638444] [2021-07-09 18:01:54,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087638444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:54,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857161647] [2021-07-09 18:01:54,089 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:54,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857161647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:54,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:54,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:01:54,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300493810] [2021-07-09 18:01:54,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:01:54,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:01:54,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:01:54,166 INFO L87 Difference]: Start difference. First operand 7965 states and 28714 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:54,358 INFO L93 Difference]: Finished difference Result 8444 states and 29934 transitions. [2021-07-09 18:01:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:01:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:54,402 INFO L225 Difference]: With dead ends: 8444 [2021-07-09 18:01:54,402 INFO L226 Difference]: Without dead ends: 8414 [2021-07-09 18:01:54,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:01:54,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-07-09 18:01:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 7984. [2021-07-09 18:01:54,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.5968933984717526) internal successors, (28714), 7983 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 28714 transitions. [2021-07-09 18:01:54,675 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 28714 transitions. Word has length 23 [2021-07-09 18:01:54,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:54,676 INFO L482 AbstractCegarLoop]: Abstraction has 7984 states and 28714 transitions. [2021-07-09 18:01:54,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 28714 transitions. [2021-07-09 18:01:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:54,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:54,690 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:54,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 18:01:54,891 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:54,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:54,891 INFO L82 PathProgramCache]: Analyzing trace with hash -541652355, now seen corresponding path program 14 times [2021-07-09 18:01:54,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:54,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24386370] [2021-07-09 18:01:54,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:54,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:54,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24386370] [2021-07-09 18:01:54,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24386370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:54,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877420778] [2021-07-09 18:01:54,917 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:54,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:54,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:01:54,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:55,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877420778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:55,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:55,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 18:01:55,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068674674] [2021-07-09 18:01:55,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:01:55,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:55,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:01:55,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:01:55,003 INFO L87 Difference]: Start difference. First operand 7984 states and 28714 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-09 18:01:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:55,211 INFO L93 Difference]: Finished difference Result 8606 states and 30521 transitions. [2021-07-09 18:01:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:01:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 23 [2021-07-09 18:01:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:55,232 INFO L225 Difference]: With dead ends: 8606 [2021-07-09 18:01:55,233 INFO L226 Difference]: Without dead ends: 8543 [2021-07-09 18:01:55,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:01:55,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-07-09 18:01:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 8052. [2021-07-09 18:01:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8051 states have (on average 3.5914793193392125) internal successors, (28915), 8051 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 28915 transitions. [2021-07-09 18:01:55,453 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 28915 transitions. Word has length 23 [2021-07-09 18:01:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:55,453 INFO L482 AbstractCegarLoop]: Abstraction has 8052 states and 28915 transitions. [2021-07-09 18:01:55,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2021-07-09 18:01:55,453 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 28915 transitions. [2021-07-09 18:01:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:55,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:55,465 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:55,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 18:01:55,665 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash 732469559, now seen corresponding path program 5 times [2021-07-09 18:01:55,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:55,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927071017] [2021-07-09 18:01:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:55,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:55,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927071017] [2021-07-09 18:01:55,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927071017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:55,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487992954] [2021-07-09 18:01:55,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:55,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:01:55,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:55,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:01:55,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:55,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487992954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:55,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:55,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:01:55,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444383911] [2021-07-09 18:01:55,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:01:55,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:55,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:01:55,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:01:55,832 INFO L87 Difference]: Start difference. First operand 8052 states and 28915 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:55,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:55,985 INFO L93 Difference]: Finished difference Result 8205 states and 29288 transitions. [2021-07-09 18:01:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:55,985 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:56,001 INFO L225 Difference]: With dead ends: 8205 [2021-07-09 18:01:56,001 INFO L226 Difference]: Without dead ends: 8172 [2021-07-09 18:01:56,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2021-07-09 18:01:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8077. [2021-07-09 18:01:56,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8077 states, 8076 states have (on average 3.5898959881129273) internal successors, (28992), 8076 states have internal predecessors, (28992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8077 states to 8077 states and 28992 transitions. [2021-07-09 18:01:56,205 INFO L78 Accepts]: Start accepts. Automaton has 8077 states and 28992 transitions. Word has length 23 [2021-07-09 18:01:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:56,205 INFO L482 AbstractCegarLoop]: Abstraction has 8077 states and 28992 transitions. [2021-07-09 18:01:56,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8077 states and 28992 transitions. [2021-07-09 18:01:56,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:56,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:56,217 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:56,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:01:56,418 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash -66570445, now seen corresponding path program 6 times [2021-07-09 18:01:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:56,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240990086] [2021-07-09 18:01:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:56,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240990086] [2021-07-09 18:01:56,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240990086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579002858] [2021-07-09 18:01:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:56,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:01:56,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:56,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:01:56,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:56,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579002858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:56,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:56,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:01:56,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969745424] [2021-07-09 18:01:56,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:01:56,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:56,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:01:56,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:01:56,602 INFO L87 Difference]: Start difference. First operand 8077 states and 28992 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:56,761 INFO L93 Difference]: Finished difference Result 10295 states and 36666 transitions. [2021-07-09 18:01:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:01:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 23 [2021-07-09 18:01:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:56,782 INFO L225 Difference]: With dead ends: 10295 [2021-07-09 18:01:56,783 INFO L226 Difference]: Without dead ends: 10247 [2021-07-09 18:01:56,783 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:01:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-07-09 18:01:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8072. [2021-07-09 18:01:56,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.5903853301945237) internal successors, (28978), 8071 states have internal predecessors, (28978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 28978 transitions. [2021-07-09 18:01:57,000 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 28978 transitions. Word has length 23 [2021-07-09 18:01:57,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:57,000 INFO L482 AbstractCegarLoop]: Abstraction has 8072 states and 28978 transitions. [2021-07-09 18:01:57,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 28978 transitions. [2021-07-09 18:01:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:57,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:57,012 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-09 18:01:57,213 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash -147969501, now seen corresponding path program 7 times [2021-07-09 18:01:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011785789] [2021-07-09 18:01:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:57,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:57,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011785789] [2021-07-09 18:01:57,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011785789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:57,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859349836] [2021-07-09 18:01:57,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:57,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:01:57,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:57,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859349836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:57,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:57,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:01:57,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258665041] [2021-07-09 18:01:57,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:01:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:57,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:01:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:57,409 INFO L87 Difference]: Start difference. First operand 8072 states and 28978 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) [2021-07-09 18:01:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:57,638 INFO L93 Difference]: Finished difference Result 10743 states and 38081 transitions. [2021-07-09 18:01:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:01:57,639 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 23 [2021-07-09 18:01:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:57,734 INFO L225 Difference]: With dead ends: 10743 [2021-07-09 18:01:57,734 INFO L226 Difference]: Without dead ends: 10695 [2021-07-09 18:01:57,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:01:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-07-09 18:01:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 8069. [2021-07-09 18:01:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 3.5909766980664353) internal successors, (28972), 8068 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 28972 transitions. [2021-07-09 18:01:57,903 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 28972 transitions. Word has length 23 [2021-07-09 18:01:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:57,903 INFO L482 AbstractCegarLoop]: Abstraction has 8069 states and 28972 transitions. [2021-07-09 18:01:57,903 INFO L483 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) [2021-07-09 18:01:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 28972 transitions. [2021-07-09 18:01:57,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:57,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:57,916 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:58,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:01:58,130 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:58,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash 265646431, now seen corresponding path program 8 times [2021-07-09 18:01:58,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:58,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860422016] [2021-07-09 18:01:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:58,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860422016] [2021-07-09 18:01:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860422016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737620025] [2021-07-09 18:01:58,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:58,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:01:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:01:58,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:58,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737620025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:58,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:58,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:01:58,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892293240] [2021-07-09 18:01:58,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:01:58,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:01:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:01:58,329 INFO L87 Difference]: Start difference. First operand 8069 states and 28972 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) [2021-07-09 18:01:58,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:58,653 INFO L93 Difference]: Finished difference Result 10785 states and 38212 transitions. [2021-07-09 18:01:58,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:01:58,654 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 23 [2021-07-09 18:01:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:58,680 INFO L225 Difference]: With dead ends: 10785 [2021-07-09 18:01:58,681 INFO L226 Difference]: Without dead ends: 10737 [2021-07-09 18:01:58,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:01:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2021-07-09 18:01:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 8068. [2021-07-09 18:01:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 3.591421842072642) internal successors, (28972), 8067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 28972 transitions. [2021-07-09 18:01:58,922 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 28972 transitions. Word has length 23 [2021-07-09 18:01:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:58,922 INFO L482 AbstractCegarLoop]: Abstraction has 8068 states and 28972 transitions. [2021-07-09 18:01:58,923 INFO L483 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) [2021-07-09 18:01:58,923 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 28972 transitions. [2021-07-09 18:01:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:58,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:58,934 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:59,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-09 18:01:59,135 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:59,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:59,135 INFO L82 PathProgramCache]: Analyzing trace with hash -418348287, now seen corresponding path program 9 times [2021-07-09 18:01:59,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:59,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116092630] [2021-07-09 18:01:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:59,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:59,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116092630] [2021-07-09 18:01:59,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116092630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:59,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9862827] [2021-07-09 18:01:59,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:59,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:01:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:59,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:01:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:01:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9862827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:59,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:01:59,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:01:59,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120117245] [2021-07-09 18:01:59,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:01:59,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:01:59,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:01:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:01:59,295 INFO L87 Difference]: Start difference. First operand 8068 states and 28972 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:01:59,466 INFO L93 Difference]: Finished difference Result 8314 states and 29600 transitions. [2021-07-09 18:01:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:01:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:01:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:01:59,482 INFO L225 Difference]: With dead ends: 8314 [2021-07-09 18:01:59,482 INFO L226 Difference]: Without dead ends: 8255 [2021-07-09 18:01:59,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:01:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-07-09 18:01:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 8137. [2021-07-09 18:01:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 8136 states have (on average 3.587266470009833) internal successors, (29186), 8136 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 29186 transitions. [2021-07-09 18:01:59,618 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 29186 transitions. Word has length 23 [2021-07-09 18:01:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:01:59,618 INFO L482 AbstractCegarLoop]: Abstraction has 8137 states and 29186 transitions. [2021-07-09 18:01:59,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:01:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 29186 transitions. [2021-07-09 18:01:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:01:59,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:01:59,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:01:59,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:01:59,845 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:01:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:01:59,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1217388291, now seen corresponding path program 10 times [2021-07-09 18:01:59,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:01:59,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835308630] [2021-07-09 18:01:59,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:01:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:01:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:01:59,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:01:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835308630] [2021-07-09 18:01:59,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835308630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:01:59,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456468275] [2021-07-09 18:01:59,896 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:01:59,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:01:59,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:01:59,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:01:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456468275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:00,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:02:00,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062071251] [2021-07-09 18:02:00,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:02:00,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:00,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:02:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:00,020 INFO L87 Difference]: Start difference. First operand 8137 states and 29186 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:00,228 INFO L93 Difference]: Finished difference Result 10367 states and 36899 transitions. [2021-07-09 18:02:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:02:00,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:00,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:00,259 INFO L225 Difference]: With dead ends: 10367 [2021-07-09 18:02:00,260 INFO L226 Difference]: Without dead ends: 10321 [2021-07-09 18:02:00,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2021-07-09 18:02:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 8140. [2021-07-09 18:02:00,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 3.5897530409141174) internal successors, (29217), 8139 states have internal predecessors, (29217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 29217 transitions. [2021-07-09 18:02:00,504 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 29217 transitions. Word has length 23 [2021-07-09 18:02:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:00,505 INFO L482 AbstractCegarLoop]: Abstraction has 8140 states and 29217 transitions. [2021-07-09 18:02:00,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:00,505 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 29217 transitions. [2021-07-09 18:02:00,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:00,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:00,521 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:00,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:00,722 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:00,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:00,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1298787347, now seen corresponding path program 11 times [2021-07-09 18:02:00,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:00,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842594915] [2021-07-09 18:02:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:00,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842594915] [2021-07-09 18:02:00,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842594915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809129841] [2021-07-09 18:02:00,781 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:00,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:00,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809129841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:00,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:00,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:02:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634394293] [2021-07-09 18:02:00,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:02:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:02:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:02:00,928 INFO L87 Difference]: Start difference. First operand 8140 states and 29217 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:01,199 INFO L93 Difference]: Finished difference Result 10852 states and 38322 transitions. [2021-07-09 18:02:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:01,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 23 [2021-07-09 18:02:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:01,223 INFO L225 Difference]: With dead ends: 10852 [2021-07-09 18:02:01,223 INFO L226 Difference]: Without dead ends: 10785 [2021-07-09 18:02:01,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:01,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-07-09 18:02:01,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 8157. [2021-07-09 18:02:01,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.5922020598332516) internal successors, (29298), 8156 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 29298 transitions. [2021-07-09 18:02:01,404 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 29298 transitions. Word has length 23 [2021-07-09 18:02:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:01,404 INFO L482 AbstractCegarLoop]: Abstraction has 8157 states and 29298 transitions. [2021-07-09 18:02:01,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 29298 transitions. [2021-07-09 18:02:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:01,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:01,415 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:01,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-09 18:02:01,616 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:01,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1071003837, now seen corresponding path program 12 times [2021-07-09 18:02:01,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:01,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510819502] [2021-07-09 18:02:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:01,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:01,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510819502] [2021-07-09 18:02:01,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510819502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885244695] [2021-07-09 18:02:01,686 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:01,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:01,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:01,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:01,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:01,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885244695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:01,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:01,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:01,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526676710] [2021-07-09 18:02:01,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:01,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:01,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:01,774 INFO L87 Difference]: Start difference. First operand 8157 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:01,943 INFO L93 Difference]: Finished difference Result 8303 states and 29650 transitions. [2021-07-09 18:02:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:02:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:01,960 INFO L225 Difference]: With dead ends: 8303 [2021-07-09 18:02:01,960 INFO L226 Difference]: Without dead ends: 8248 [2021-07-09 18:02:01,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:01,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-07-09 18:02:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8175. [2021-07-09 18:02:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5910203082945924) internal successors, (29353), 8174 states have internal predecessors, (29353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29353 transitions. [2021-07-09 18:02:02,116 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29353 transitions. Word has length 23 [2021-07-09 18:02:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:02,117 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29353 transitions. [2021-07-09 18:02:02,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29353 transitions. [2021-07-09 18:02:02,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:02,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:02,129 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:02,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:02,330 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash 271963833, now seen corresponding path program 13 times [2021-07-09 18:02:02,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:02,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032404180] [2021-07-09 18:02:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:02,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032404180] [2021-07-09 18:02:02,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032404180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478704325] [2021-07-09 18:02:02,393 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:02,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:02,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:02,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:02,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478704325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:02,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:02,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:02,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245050473] [2021-07-09 18:02:02,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:02,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:02,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:02,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:02,502 INFO L87 Difference]: Start difference. First operand 8175 states and 29353 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:02,703 INFO L93 Difference]: Finished difference Result 10332 states and 36818 transitions. [2021-07-09 18:02:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:02:02,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:02,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:02,725 INFO L225 Difference]: With dead ends: 10332 [2021-07-09 18:02:02,725 INFO L226 Difference]: Without dead ends: 10286 [2021-07-09 18:02:02,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-07-09 18:02:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8171. [2021-07-09 18:02:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 3.591309669522644) internal successors, (29341), 8170 states have internal predecessors, (29341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 29341 transitions. [2021-07-09 18:02:02,899 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 29341 transitions. Word has length 23 [2021-07-09 18:02:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:02,899 INFO L482 AbstractCegarLoop]: Abstraction has 8171 states and 29341 transitions. [2021-07-09 18:02:02,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 29341 transitions. [2021-07-09 18:02:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:02,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:02,912 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:03,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-09 18:02:03,117 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:03,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:03,117 INFO L82 PathProgramCache]: Analyzing trace with hash 11839967, now seen corresponding path program 14 times [2021-07-09 18:02:03,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:03,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461117788] [2021-07-09 18:02:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:03,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:03,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461117788] [2021-07-09 18:02:03,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461117788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:03,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802565057] [2021-07-09 18:02:03,208 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:03,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:03,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:03,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:03,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802565057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:03,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:03,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:03,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892390845] [2021-07-09 18:02:03,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:03,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:03,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:03,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:03,293 INFO L87 Difference]: Start difference. First operand 8171 states and 29341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:03,450 INFO L93 Difference]: Finished difference Result 8275 states and 29573 transitions. [2021-07-09 18:02:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:02:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:03,468 INFO L225 Difference]: With dead ends: 8275 [2021-07-09 18:02:03,469 INFO L226 Difference]: Without dead ends: 8232 [2021-07-09 18:02:03,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:03,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-07-09 18:02:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8175. [2021-07-09 18:02:03,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5902862735502814) internal successors, (29347), 8174 states have internal predecessors, (29347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29347 transitions. [2021-07-09 18:02:03,605 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29347 transitions. Word has length 23 [2021-07-09 18:02:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:03,605 INFO L482 AbstractCegarLoop]: Abstraction has 8175 states and 29347 transitions. [2021-07-09 18:02:03,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29347 transitions. [2021-07-09 18:02:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:03,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:03,617 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:03,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 18:02:03,818 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash 33595821, now seen corresponding path program 15 times [2021-07-09 18:02:03,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:03,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059428656] [2021-07-09 18:02:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:03,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:03,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059428656] [2021-07-09 18:02:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059428656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:03,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799213808] [2021-07-09 18:02:03,866 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:03,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:03,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799213808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:03,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:03,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:03,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478918977] [2021-07-09 18:02:03,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:03,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:03,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:03,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:03,947 INFO L87 Difference]: Start difference. First operand 8175 states and 29347 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:04,176 INFO L93 Difference]: Finished difference Result 10463 states and 37022 transitions. [2021-07-09 18:02:04,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:02:04,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:04,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:04,199 INFO L225 Difference]: With dead ends: 10463 [2021-07-09 18:02:04,199 INFO L226 Difference]: Without dead ends: 10463 [2021-07-09 18:02:04,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-07-09 18:02:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8533. [2021-07-09 18:02:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 8532 states have (on average 3.587318330989217) internal successors, (30607), 8532 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 30607 transitions. [2021-07-09 18:02:04,374 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 30607 transitions. Word has length 23 [2021-07-09 18:02:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:04,374 INFO L482 AbstractCegarLoop]: Abstraction has 8533 states and 30607 transitions. [2021-07-09 18:02:04,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 30607 transitions. [2021-07-09 18:02:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:04,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:04,390 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:04,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:04,590 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:04,591 INFO L82 PathProgramCache]: Analyzing trace with hash -108973523, now seen corresponding path program 16 times [2021-07-09 18:02:04,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:04,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732738638] [2021-07-09 18:02:04,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:04,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732738638] [2021-07-09 18:02:04,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732738638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918045145] [2021-07-09 18:02:04,649 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 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 [2021-07-09 18:02:04,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:04,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:04,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:04,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:04,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918045145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:04,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:04,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:04,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076517426] [2021-07-09 18:02:04,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:04,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:04,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:04,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:04,729 INFO L87 Difference]: Start difference. First operand 8533 states and 30607 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:04,944 INFO L93 Difference]: Finished difference Result 18599 states and 66456 transitions. [2021-07-09 18:02:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:02:04,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:04,987 INFO L225 Difference]: With dead ends: 18599 [2021-07-09 18:02:04,987 INFO L226 Difference]: Without dead ends: 18599 [2021-07-09 18:02:04,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:02:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2021-07-09 18:02:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 14058. [2021-07-09 18:02:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-07-09 18:02:05,276 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-07-09 18:02:05,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:05,276 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-07-09 18:02:05,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,276 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-07-09 18:02:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:05,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:05,298 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:05,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-09 18:02:05,499 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1805708085, now seen corresponding path program 17 times [2021-07-09 18:02:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:05,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607365137] [2021-07-09 18:02:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:05,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:05,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607365137] [2021-07-09 18:02:05,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607365137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:05,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786213144] [2021-07-09 18:02:05,543 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:05,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:05,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:05,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:05,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786213144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:05,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:05,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:05,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745090183] [2021-07-09 18:02:05,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:05,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:05,617 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:05,844 INFO L93 Difference]: Finished difference Result 14997 states and 53374 transitions. [2021-07-09 18:02:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:02:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:05,877 INFO L225 Difference]: With dead ends: 14997 [2021-07-09 18:02:05,877 INFO L226 Difference]: Without dead ends: 14997 [2021-07-09 18:02:05,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-07-09 18:02:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14058. [2021-07-09 18:02:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-07-09 18:02:06,131 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-07-09 18:02:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:06,131 INFO L482 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-07-09 18:02:06,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,131 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-07-09 18:02:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:06,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:06,149 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:06,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:06,350 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1550642503, now seen corresponding path program 18 times [2021-07-09 18:02:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:06,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585962188] [2021-07-09 18:02:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585962188] [2021-07-09 18:02:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585962188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159878635] [2021-07-09 18:02:06,391 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 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 [2021-07-09 18:02:06,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:06,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:06,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:06,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:06,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159878635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:06,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:06,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:02:06,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011945832] [2021-07-09 18:02:06,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:02:06,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:02:06,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:06,486 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:06,812 INFO L93 Difference]: Finished difference Result 25256 states and 90164 transitions. [2021-07-09 18:02:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:06,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:06,893 INFO L225 Difference]: With dead ends: 25256 [2021-07-09 18:02:06,894 INFO L226 Difference]: Without dead ends: 25256 [2021-07-09 18:02:06,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25256 states. [2021-07-09 18:02:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25256 to 14108. [2021-07-09 18:02:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14108 states, 14107 states have (on average 3.5999149358474516) internal successors, (50784), 14107 states have internal predecessors, (50784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 50784 transitions. [2021-07-09 18:02:07,311 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 50784 transitions. Word has length 23 [2021-07-09 18:02:07,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:07,311 INFO L482 AbstractCegarLoop]: Abstraction has 14108 states and 50784 transitions. [2021-07-09 18:02:07,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 50784 transitions. [2021-07-09 18:02:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:07,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:07,329 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:07,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-09 18:02:07,542 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash -530911043, now seen corresponding path program 19 times [2021-07-09 18:02:07,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:07,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018112059] [2021-07-09 18:02:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018112059] [2021-07-09 18:02:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018112059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787512207] [2021-07-09 18:02:07,578 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 [2021-07-09 18:02:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:07,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787512207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:07,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:07,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:07,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145184016] [2021-07-09 18:02:07,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:07,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:07,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:07,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:07,689 INFO L87 Difference]: Start difference. First operand 14108 states and 50784 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:07,944 INFO L93 Difference]: Finished difference Result 21867 states and 76984 transitions. [2021-07-09 18:02:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:02:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:07,996 INFO L225 Difference]: With dead ends: 21867 [2021-07-09 18:02:07,997 INFO L226 Difference]: Without dead ends: 21867 [2021-07-09 18:02:07,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21867 states. [2021-07-09 18:02:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21867 to 14162. [2021-07-09 18:02:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14162 states, 14161 states have (on average 3.599957630110868) internal successors, (50979), 14161 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14162 states to 14162 states and 50979 transitions. [2021-07-09 18:02:08,376 INFO L78 Accepts]: Start accepts. Automaton has 14162 states and 50979 transitions. Word has length 23 [2021-07-09 18:02:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:08,376 INFO L482 AbstractCegarLoop]: Abstraction has 14162 states and 50979 transitions. [2021-07-09 18:02:08,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 14162 states and 50979 transitions. [2021-07-09 18:02:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:08,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:08,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:08,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:02:08,594 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:08,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:08,595 INFO L82 PathProgramCache]: Analyzing trace with hash 851877945, now seen corresponding path program 20 times [2021-07-09 18:02:08,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:08,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796880016] [2021-07-09 18:02:08,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:08,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:08,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:08,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796880016] [2021-07-09 18:02:08,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796880016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:08,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64118979] [2021-07-09 18:02:08,645 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 [2021-07-09 18:02:08,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:08,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:08,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:08,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:08,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:08,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64118979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:08,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:08,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:02:08,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585936942] [2021-07-09 18:02:08,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:02:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:02:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:02:08,761 INFO L87 Difference]: Start difference. First operand 14162 states and 50979 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:09,148 INFO L93 Difference]: Finished difference Result 27150 states and 96606 transitions. [2021-07-09 18:02:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 23 [2021-07-09 18:02:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:09,220 INFO L225 Difference]: With dead ends: 27150 [2021-07-09 18:02:09,220 INFO L226 Difference]: Without dead ends: 27144 [2021-07-09 18:02:09,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:02:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-07-09 18:02:09,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 14874. [2021-07-09 18:02:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14874 states, 14873 states have (on average 3.604921670140523) internal successors, (53616), 14873 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14874 states to 14874 states and 53616 transitions. [2021-07-09 18:02:09,588 INFO L78 Accepts]: Start accepts. Automaton has 14874 states and 53616 transitions. Word has length 23 [2021-07-09 18:02:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:09,588 INFO L482 AbstractCegarLoop]: Abstraction has 14874 states and 53616 transitions. [2021-07-09 18:02:09,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 14874 states and 53616 transitions. [2021-07-09 18:02:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:09,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:09,609 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:09,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:09,809 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1871609405, now seen corresponding path program 21 times [2021-07-09 18:02:09,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:09,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290003108] [2021-07-09 18:02:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:09,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290003108] [2021-07-09 18:02:09,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290003108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944718521] [2021-07-09 18:02:09,858 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:09,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:02:09,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:09,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:09,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:09,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944718521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:09,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:09,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:02:09,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172556983] [2021-07-09 18:02:09,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:02:09,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:09,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:02:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:09,981 INFO L87 Difference]: Start difference. First operand 14874 states and 53616 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:10,339 INFO L93 Difference]: Finished difference Result 22680 states and 79637 transitions. [2021-07-09 18:02:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:02:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:10,398 INFO L225 Difference]: With dead ends: 22680 [2021-07-09 18:02:10,398 INFO L226 Difference]: Without dead ends: 22680 [2021-07-09 18:02:10,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:02:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22680 states. [2021-07-09 18:02:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22680 to 14862. [2021-07-09 18:02:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-07-09 18:02:10,710 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-07-09 18:02:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:10,710 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-07-09 18:02:10,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-07-09 18:02:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:10,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:10,731 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:10,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:02:10,931 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1111272131, now seen corresponding path program 22 times [2021-07-09 18:02:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:10,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808980924] [2021-07-09 18:02:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:10,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808980924] [2021-07-09 18:02:10,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808980924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654221227] [2021-07-09 18:02:10,978 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:11,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:11,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654221227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:11,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:11,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:11,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91533744] [2021-07-09 18:02:11,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:11,063 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:11,336 INFO L93 Difference]: Finished difference Result 19297 states and 68666 transitions. [2021-07-09 18:02:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:11,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:11,387 INFO L225 Difference]: With dead ends: 19297 [2021-07-09 18:02:11,387 INFO L226 Difference]: Without dead ends: 19297 [2021-07-09 18:02:11,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:11,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19297 states. [2021-07-09 18:02:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19297 to 14862. [2021-07-09 18:02:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-07-09 18:02:11,679 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-07-09 18:02:11,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:11,679 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-07-09 18:02:11,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:11,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-07-09 18:02:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:11,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:11,793 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:11,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 18:02:11,994 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:11,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1359329409, now seen corresponding path program 23 times [2021-07-09 18:02:11,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:11,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439258120] [2021-07-09 18:02:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:12,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439258120] [2021-07-09 18:02:12,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439258120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774624518] [2021-07-09 18:02:12,044 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 [2021-07-09 18:02:12,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:12,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:12,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:12,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:12,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774624518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:12,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:12,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:12,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956640785] [2021-07-09 18:02:12,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:12,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:12,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:12,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:12,140 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:12,441 INFO L93 Difference]: Finished difference Result 33945 states and 122633 transitions. [2021-07-09 18:02:12,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:12,442 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:12,533 INFO L225 Difference]: With dead ends: 33945 [2021-07-09 18:02:12,533 INFO L226 Difference]: Without dead ends: 33935 [2021-07-09 18:02:12,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:12,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33935 states. [2021-07-09 18:02:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33935 to 26076. [2021-07-09 18:02:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26076 states, 26075 states have (on average 3.595091083413231) internal successors, (93742), 26075 states have internal predecessors, (93742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26076 states to 26076 states and 93742 transitions. [2021-07-09 18:02:13,154 INFO L78 Accepts]: Start accepts. Automaton has 26076 states and 93742 transitions. Word has length 23 [2021-07-09 18:02:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:13,154 INFO L482 AbstractCegarLoop]: Abstraction has 26076 states and 93742 transitions. [2021-07-09 18:02:13,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 26076 states and 93742 transitions. [2021-07-09 18:02:13,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:13,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:13,184 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:13,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:02:13,384 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -337405153, now seen corresponding path program 24 times [2021-07-09 18:02:13,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:13,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572766236] [2021-07-09 18:02:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:13,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:13,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572766236] [2021-07-09 18:02:13,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572766236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:13,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611847977] [2021-07-09 18:02:13,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:13,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:13,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:13,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:02:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:13,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611847977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:13,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:13,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:13,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096217124] [2021-07-09 18:02:13,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:13,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:13,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:13,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:13,524 INFO L87 Difference]: Start difference. First operand 26076 states and 93742 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:13,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:13,799 INFO L93 Difference]: Finished difference Result 26734 states and 95761 transitions. [2021-07-09 18:02:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:02:13,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:13,868 INFO L225 Difference]: With dead ends: 26734 [2021-07-09 18:02:13,868 INFO L226 Difference]: Without dead ends: 26734 [2021-07-09 18:02:13,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:02:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2021-07-09 18:02:14,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 26088. [2021-07-09 18:02:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26088 states, 26087 states have (on average 3.5951240081266533) internal successors, (93786), 26087 states have internal predecessors, (93786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26088 states to 26088 states and 93786 transitions. [2021-07-09 18:02:14,367 INFO L78 Accepts]: Start accepts. Automaton has 26088 states and 93786 transitions. Word has length 23 [2021-07-09 18:02:14,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:14,368 INFO L482 AbstractCegarLoop]: Abstraction has 26088 states and 93786 transitions. [2021-07-09 18:02:14,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26088 states and 93786 transitions. [2021-07-09 18:02:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:14,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:14,395 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:14,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,596 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1911852527, now seen corresponding path program 15 times [2021-07-09 18:02:14,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:14,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862602129] [2021-07-09 18:02:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:14,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862602129] [2021-07-09 18:02:14,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862602129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84215449] [2021-07-09 18:02:14,624 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:14,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:14,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:14,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:14,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84215449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:14,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:14,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:02:14,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986730051] [2021-07-09 18:02:14,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:14,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:14,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:14,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:14,712 INFO L87 Difference]: Start difference. First operand 26088 states and 93786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:14,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:14,956 INFO L93 Difference]: Finished difference Result 27275 states and 97322 transitions. [2021-07-09 18:02:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:02:14,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:14,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:15,030 INFO L225 Difference]: With dead ends: 27275 [2021-07-09 18:02:15,030 INFO L226 Difference]: Without dead ends: 27223 [2021-07-09 18:02:15,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2021-07-09 18:02:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 26365. [2021-07-09 18:02:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26365 states, 26364 states have (on average 3.5933469883174025) internal successors, (94735), 26364 states have internal predecessors, (94735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26365 states to 26365 states and 94735 transitions. [2021-07-09 18:02:15,621 INFO L78 Accepts]: Start accepts. Automaton has 26365 states and 94735 transitions. Word has length 23 [2021-07-09 18:02:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:15,622 INFO L482 AbstractCegarLoop]: Abstraction has 26365 states and 94735 transitions. [2021-07-09 18:02:15,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 26365 states and 94735 transitions. [2021-07-09 18:02:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:15,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:15,651 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:15,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:15,851 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:15,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:15,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1784976879, now seen corresponding path program 16 times [2021-07-09 18:02:15,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:15,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291263853] [2021-07-09 18:02:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:15,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:15,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291263853] [2021-07-09 18:02:15,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291263853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718598247] [2021-07-09 18:02:15,879 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:15,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:15,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:15,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:15,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718598247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:15,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:15,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:02:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192918502] [2021-07-09 18:02:15,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:15,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:15,956 INFO L87 Difference]: Start difference. First operand 26365 states and 94735 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:16,227 INFO L93 Difference]: Finished difference Result 26807 states and 95786 transitions. [2021-07-09 18:02:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:02:16,227 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:16,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:16,309 INFO L225 Difference]: With dead ends: 26807 [2021-07-09 18:02:16,310 INFO L226 Difference]: Without dead ends: 26797 [2021-07-09 18:02:16,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:02:16,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2021-07-09 18:02:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26277. [2021-07-09 18:02:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 3.593811843507383) internal successors, (94431), 26276 states have internal predecessors, (94431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 94431 transitions. [2021-07-09 18:02:16,847 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 94431 transitions. Word has length 23 [2021-07-09 18:02:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:16,847 INFO L482 AbstractCegarLoop]: Abstraction has 26277 states and 94431 transitions. [2021-07-09 18:02:16,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 94431 transitions. [2021-07-09 18:02:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:16,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:16,877 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:17,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:17,081 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -51297549, now seen corresponding path program 17 times [2021-07-09 18:02:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:17,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422792754] [2021-07-09 18:02:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:17,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422792754] [2021-07-09 18:02:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422792754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923799555] [2021-07-09 18:02:17,099 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:17,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:02:17,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:17,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:17,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:17,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923799555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:17,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:17,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:02:17,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321892184] [2021-07-09 18:02:17,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:17,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:17,192 INFO L87 Difference]: Start difference. First operand 26277 states and 94431 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:17,502 INFO L93 Difference]: Finished difference Result 26602 states and 95215 transitions. [2021-07-09 18:02:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:17,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:17,568 INFO L225 Difference]: With dead ends: 26602 [2021-07-09 18:02:17,568 INFO L226 Difference]: Without dead ends: 26542 [2021-07-09 18:02:17,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:02:17,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2021-07-09 18:02:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 26119. [2021-07-09 18:02:17,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26119 states, 26118 states have (on average 3.5962937437782374) internal successors, (93928), 26118 states have internal predecessors, (93928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26119 states to 26119 states and 93928 transitions. [2021-07-09 18:02:18,073 INFO L78 Accepts]: Start accepts. Automaton has 26119 states and 93928 transitions. Word has length 23 [2021-07-09 18:02:18,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:18,073 INFO L482 AbstractCegarLoop]: Abstraction has 26119 states and 93928 transitions. [2021-07-09 18:02:18,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 26119 states and 93928 transitions. [2021-07-09 18:02:18,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:18,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:18,102 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:18,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:18,303 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:18,303 INFO L82 PathProgramCache]: Analyzing trace with hash 837128115, now seen corresponding path program 18 times [2021-07-09 18:02:18,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:18,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335315307] [2021-07-09 18:02:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:18,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335315307] [2021-07-09 18:02:18,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335315307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088693688] [2021-07-09 18:02:18,333 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:18,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:02:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:18,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088693688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:18,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:18,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:02:18,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340570274] [2021-07-09 18:02:18,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:18,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:18,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:18,460 INFO L87 Difference]: Start difference. First operand 26119 states and 93928 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:18,851 INFO L93 Difference]: Finished difference Result 26987 states and 96631 transitions. [2021-07-09 18:02:18,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:02:18,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:18,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:18,928 INFO L225 Difference]: With dead ends: 26987 [2021-07-09 18:02:18,928 INFO L226 Difference]: Without dead ends: 26963 [2021-07-09 18:02:18,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:02:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2021-07-09 18:02:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 26267. [2021-07-09 18:02:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 3.5969694662301075) internal successors, (94478), 26266 states have internal predecessors, (94478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 94478 transitions. [2021-07-09 18:02:19,602 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 94478 transitions. Word has length 23 [2021-07-09 18:02:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:19,602 INFO L482 AbstractCegarLoop]: Abstraction has 26267 states and 94478 transitions. [2021-07-09 18:02:19,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 94478 transitions. [2021-07-09 18:02:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:19,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:19,632 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:19,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-09 18:02:19,833 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:19,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash 710252467, now seen corresponding path program 19 times [2021-07-09 18:02:19,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:19,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439755613] [2021-07-09 18:02:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:19,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:19,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439755613] [2021-07-09 18:02:19,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439755613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:19,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78157871] [2021-07-09 18:02:19,854 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:19,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:19,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78157871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:19,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:19,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:02:19,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861114697] [2021-07-09 18:02:19,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:19,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:19,934 INFO L87 Difference]: Start difference. First operand 26267 states and 94478 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:20,252 INFO L93 Difference]: Finished difference Result 26543 states and 95133 transitions. [2021-07-09 18:02:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:20,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:20,322 INFO L225 Difference]: With dead ends: 26543 [2021-07-09 18:02:20,323 INFO L226 Difference]: Without dead ends: 26533 [2021-07-09 18:02:20,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2021-07-09 18:02:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26261. [2021-07-09 18:02:20,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 3.596839299314547) internal successors, (94453), 26260 states have internal predecessors, (94453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 94453 transitions. [2021-07-09 18:02:20,852 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 94453 transitions. Word has length 23 [2021-07-09 18:02:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:20,852 INFO L482 AbstractCegarLoop]: Abstraction has 26261 states and 94453 transitions. [2021-07-09 18:02:20,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 94453 transitions. [2021-07-09 18:02:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:20,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:20,882 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:21,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,082 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:21,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1071393779, now seen corresponding path program 20 times [2021-07-09 18:02:21,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:21,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102298151] [2021-07-09 18:02:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102298151] [2021-07-09 18:02:21,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102298151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198232953] [2021-07-09 18:02:21,106 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:21,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:21,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:21,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:21,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:21,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198232953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:21,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:21,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-09 18:02:21,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253122237] [2021-07-09 18:02:21,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:21,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:21,201 INFO L87 Difference]: Start difference. First operand 26261 states and 94453 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-09 18:02:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:21,449 INFO L93 Difference]: Finished difference Result 26792 states and 96145 transitions. [2021-07-09 18:02:21,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:02:21,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 23 [2021-07-09 18:02:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:21,517 INFO L225 Difference]: With dead ends: 26792 [2021-07-09 18:02:21,517 INFO L226 Difference]: Without dead ends: 26792 [2021-07-09 18:02:21,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-07-09 18:02:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 26250. [2021-07-09 18:02:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 26249 states have (on average 3.595908415558688) internal successors, (94389), 26249 states have internal predecessors, (94389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 94389 transitions. [2021-07-09 18:02:22,028 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 94389 transitions. Word has length 23 [2021-07-09 18:02:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:22,028 INFO L482 AbstractCegarLoop]: Abstraction has 26250 states and 94389 transitions. [2021-07-09 18:02:22,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-07-09 18:02:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 94389 transitions. [2021-07-09 18:02:22,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:22,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:22,058 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:22,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-09 18:02:22,259 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:22,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:22,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1604402439, now seen corresponding path program 25 times [2021-07-09 18:02:22,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:22,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539528001] [2021-07-09 18:02:22,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:22,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539528001] [2021-07-09 18:02:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539528001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66900015] [2021-07-09 18:02:22,314 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:22,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:22,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:22,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66900015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:22,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:22,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019639415] [2021-07-09 18:02:22,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:22,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:22,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:22,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:22,406 INFO L87 Difference]: Start difference. First operand 26250 states and 94389 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:22,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:22,836 INFO L93 Difference]: Finished difference Result 26475 states and 94952 transitions. [2021-07-09 18:02:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:02:22,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:22,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:22,903 INFO L225 Difference]: With dead ends: 26475 [2021-07-09 18:02:22,903 INFO L226 Difference]: Without dead ends: 26404 [2021-07-09 18:02:22,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-07-09 18:02:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26284. [2021-07-09 18:02:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.595099493969486) internal successors, (94490), 26283 states have internal predecessors, (94490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 94490 transitions. [2021-07-09 18:02:23,388 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 94490 transitions. Word has length 23 [2021-07-09 18:02:23,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:23,388 INFO L482 AbstractCegarLoop]: Abstraction has 26284 states and 94490 transitions. [2021-07-09 18:02:23,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:23,388 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 94490 transitions. [2021-07-09 18:02:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:23,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:23,417 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:23,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:23,618 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash 805362435, now seen corresponding path program 26 times [2021-07-09 18:02:23,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:23,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092411557] [2021-07-09 18:02:23,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:23,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:23,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092411557] [2021-07-09 18:02:23,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092411557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:23,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124279319] [2021-07-09 18:02:23,669 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:23,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124279319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:23,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:23,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:23,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154486936] [2021-07-09 18:02:23,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:23,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:23,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:23,770 INFO L87 Difference]: Start difference. First operand 26284 states and 94490 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:24,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:24,048 INFO L93 Difference]: Finished difference Result 33195 states and 119238 transitions. [2021-07-09 18:02:24,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:02:24,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:24,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:24,140 INFO L225 Difference]: With dead ends: 33195 [2021-07-09 18:02:24,140 INFO L226 Difference]: Without dead ends: 33149 [2021-07-09 18:02:24,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33149 states. [2021-07-09 18:02:24,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33149 to 26274. [2021-07-09 18:02:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 3.5954782476306475) internal successors, (94464), 26273 states have internal predecessors, (94464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:24,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 94464 transitions. [2021-07-09 18:02:24,708 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 94464 transitions. Word has length 23 [2021-07-09 18:02:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:24,708 INFO L482 AbstractCegarLoop]: Abstraction has 26274 states and 94464 transitions. [2021-07-09 18:02:24,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 94464 transitions. [2021-07-09 18:02:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:24,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:24,741 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:24,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-09 18:02:24,949 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 723963379, now seen corresponding path program 27 times [2021-07-09 18:02:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:24,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250494765] [2021-07-09 18:02:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:25,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:25,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250494765] [2021-07-09 18:02:25,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250494765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:25,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702024841] [2021-07-09 18:02:25,003 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:25,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:02:25,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:25,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:25,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702024841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:25,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:25,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:02:25,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447149943] [2021-07-09 18:02:25,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:02:25,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:25,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:02:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:25,124 INFO L87 Difference]: Start difference. First operand 26274 states and 94464 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:25,842 INFO L93 Difference]: Finished difference Result 33827 states and 120954 transitions. [2021-07-09 18:02:25,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:02:25,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:25,933 INFO L225 Difference]: With dead ends: 33827 [2021-07-09 18:02:25,933 INFO L226 Difference]: Without dead ends: 33589 [2021-07-09 18:02:25,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 390.1ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:02:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33589 states. [2021-07-09 18:02:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33589 to 26278. [2021-07-09 18:02:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 3.59557788179777) internal successors, (94481), 26277 states have internal predecessors, (94481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 94481 transitions. [2021-07-09 18:02:26,529 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 94481 transitions. Word has length 23 [2021-07-09 18:02:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:26,529 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 94481 transitions. [2021-07-09 18:02:26,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 94481 transitions. [2021-07-09 18:02:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:26,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:26,715 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:26,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:26,916 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1201212733, now seen corresponding path program 28 times [2021-07-09 18:02:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:26,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499443638] [2021-07-09 18:02:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:26,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:26,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499443638] [2021-07-09 18:02:26,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499443638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:26,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551367871] [2021-07-09 18:02:26,978 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:27,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:27,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:27,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551367871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:27,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:27,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 18:02:27,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036172302] [2021-07-09 18:02:27,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:02:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:02:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:02:27,050 INFO L87 Difference]: Start difference. First operand 26278 states and 94481 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:27,306 INFO L93 Difference]: Finished difference Result 26465 states and 94972 transitions. [2021-07-09 18:02:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:02:27,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:27,401 INFO L225 Difference]: With dead ends: 26465 [2021-07-09 18:02:27,401 INFO L226 Difference]: Without dead ends: 26406 [2021-07-09 18:02:27,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:27,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-07-09 18:02:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26302. [2021-07-09 18:02:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26302 states, 26301 states have (on average 3.595262537546101) internal successors, (94559), 26301 states have internal predecessors, (94559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 94559 transitions. [2021-07-09 18:02:27,930 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 94559 transitions. Word has length 23 [2021-07-09 18:02:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:27,930 INFO L482 AbstractCegarLoop]: Abstraction has 26302 states and 94559 transitions. [2021-07-09 18:02:27,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 94559 transitions. [2021-07-09 18:02:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:27,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:27,958 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:28,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:28,160 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2000252737, now seen corresponding path program 29 times [2021-07-09 18:02:28,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:28,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467053768] [2021-07-09 18:02:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:28,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467053768] [2021-07-09 18:02:28,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467053768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286671216] [2021-07-09 18:02:28,217 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:28,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:28,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:28,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:28,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:28,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286671216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:28,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:28,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:28,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054441166] [2021-07-09 18:02:28,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:28,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:28,316 INFO L87 Difference]: Start difference. First operand 26302 states and 94559 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:28,621 INFO L93 Difference]: Finished difference Result 33157 states and 119124 transitions. [2021-07-09 18:02:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:02:28,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:28,711 INFO L225 Difference]: With dead ends: 33157 [2021-07-09 18:02:28,711 INFO L226 Difference]: Without dead ends: 33111 [2021-07-09 18:02:28,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-07-09 18:02:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 26299. [2021-07-09 18:02:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26299 states, 26298 states have (on average 3.595520571906609) internal successors, (94555), 26298 states have internal predecessors, (94555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 94555 transitions. [2021-07-09 18:02:29,372 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 94555 transitions. Word has length 23 [2021-07-09 18:02:29,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:29,372 INFO L482 AbstractCegarLoop]: Abstraction has 26299 states and 94555 transitions. [2021-07-09 18:02:29,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:29,372 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 94555 transitions. [2021-07-09 18:02:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:29,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:29,402 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:29,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-07-09 18:02:29,602 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:29,603 INFO L82 PathProgramCache]: Analyzing trace with hash 2034590693, now seen corresponding path program 30 times [2021-07-09 18:02:29,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:29,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144468998] [2021-07-09 18:02:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144468998] [2021-07-09 18:02:29,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144468998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233637595] [2021-07-09 18:02:29,676 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:29,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:29,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:29,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:29,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233637595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:29,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:29,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 18:02:29,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828153806] [2021-07-09 18:02:29,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:02:29,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:29,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:02:29,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:02:29,757 INFO L87 Difference]: Start difference. First operand 26299 states and 94555 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:30,023 INFO L93 Difference]: Finished difference Result 26430 states and 94880 transitions. [2021-07-09 18:02:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:02:30,024 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-07-09 18:02:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:30,090 INFO L225 Difference]: With dead ends: 26430 [2021-07-09 18:02:30,090 INFO L226 Difference]: Without dead ends: 26387 [2021-07-09 18:02:30,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:30,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26387 states. [2021-07-09 18:02:30,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26387 to 26303. [2021-07-09 18:02:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26303 states, 26302 states have (on average 3.595201885788153) internal successors, (94561), 26302 states have internal predecessors, (94561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 94561 transitions. [2021-07-09 18:02:30,811 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 94561 transitions. Word has length 23 [2021-07-09 18:02:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:30,811 INFO L482 AbstractCegarLoop]: Abstraction has 26303 states and 94561 transitions. [2021-07-09 18:02:30,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 94561 transitions. [2021-07-09 18:02:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:30,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:30,840 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:31,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 18:02:31,041 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:31,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:31,041 INFO L82 PathProgramCache]: Analyzing trace with hash 2056346547, now seen corresponding path program 31 times [2021-07-09 18:02:31,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:31,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525497503] [2021-07-09 18:02:31,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:31,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:31,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525497503] [2021-07-09 18:02:31,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525497503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:31,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918920238] [2021-07-09 18:02:31,085 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918920238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:31,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:31,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:02:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124638464] [2021-07-09 18:02:31,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:31,151 INFO L87 Difference]: Start difference. First operand 26303 states and 94561 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-09 18:02:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:31,408 INFO L93 Difference]: Finished difference Result 27397 states and 97838 transitions. [2021-07-09 18:02:31,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:31,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 23 [2021-07-09 18:02:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:31,480 INFO L225 Difference]: With dead ends: 27397 [2021-07-09 18:02:31,481 INFO L226 Difference]: Without dead ends: 27397 [2021-07-09 18:02:31,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:02:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-07-09 18:02:32,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 26148. [2021-07-09 18:02:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26147 states have (on average 3.595861857956936) internal successors, (94021), 26147 states have internal predecessors, (94021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:32,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 94021 transitions. [2021-07-09 18:02:32,114 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 94021 transitions. Word has length 23 [2021-07-09 18:02:32,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:32,114 INFO L482 AbstractCegarLoop]: Abstraction has 26148 states and 94021 transitions. [2021-07-09 18:02:32,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-09 18:02:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 94021 transitions. [2021-07-09 18:02:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:32,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:32,145 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:32,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:32,352 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:32,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:32,353 INFO L82 PathProgramCache]: Analyzing trace with hash 472108223, now seen corresponding path program 32 times [2021-07-09 18:02:32,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:32,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90031261] [2021-07-09 18:02:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:32,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:32,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90031261] [2021-07-09 18:02:32,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90031261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:32,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821666575] [2021-07-09 18:02:32,397 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 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 [2021-07-09 18:02:32,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:32,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:32,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821666575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:32,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:32,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:02:32,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549143760] [2021-07-09 18:02:32,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:02:32,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:32,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:02:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:32,488 INFO L87 Difference]: Start difference. First operand 26148 states and 94021 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:32,907 INFO L93 Difference]: Finished difference Result 42723 states and 155237 transitions. [2021-07-09 18:02:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:33,205 INFO L225 Difference]: With dead ends: 42723 [2021-07-09 18:02:33,205 INFO L226 Difference]: Without dead ends: 42723 [2021-07-09 18:02:33,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-07-09 18:02:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 21505. [2021-07-09 18:02:33,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 3.5904482886904763) internal successors, (77209), 21504 states have internal predecessors, (77209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 77209 transitions. [2021-07-09 18:02:33,832 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 77209 transitions. Word has length 23 [2021-07-09 18:02:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:33,832 INFO L482 AbstractCegarLoop]: Abstraction has 21505 states and 77209 transitions. [2021-07-09 18:02:33,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 77209 transitions. [2021-07-09 18:02:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:33,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:33,859 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:34,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 18:02:34,059 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:34,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1491839683, now seen corresponding path program 33 times [2021-07-09 18:02:34,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:34,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820120752] [2021-07-09 18:02:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820120752] [2021-07-09 18:02:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820120752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:34,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311128607] [2021-07-09 18:02:34,104 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 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 [2021-07-09 18:02:34,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:02:34,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:34,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:34,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311128607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:34,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:34,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-07-09 18:02:34,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870691662] [2021-07-09 18:02:34,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:34,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:34,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:34,194 INFO L87 Difference]: Start difference. First operand 21505 states and 77209 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:34,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:34,647 INFO L93 Difference]: Finished difference Result 32944 states and 119221 transitions. [2021-07-09 18:02:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:02:34,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:34,735 INFO L225 Difference]: With dead ends: 32944 [2021-07-09 18:02:34,736 INFO L226 Difference]: Without dead ends: 32944 [2021-07-09 18:02:34,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:02:34,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-07-09 18:02:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 25922. [2021-07-09 18:02:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25921 states have (on average 3.586397129740365) internal successors, (92963), 25921 states have internal predecessors, (92963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 92963 transitions. [2021-07-09 18:02:35,410 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 92963 transitions. Word has length 23 [2021-07-09 18:02:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:35,410 INFO L482 AbstractCegarLoop]: Abstraction has 25922 states and 92963 transitions. [2021-07-09 18:02:35,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 92963 transitions. [2021-07-09 18:02:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:35,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:35,449 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:35,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:35,663 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:35,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1489861369, now seen corresponding path program 34 times [2021-07-09 18:02:35,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:35,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970264536] [2021-07-09 18:02:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:35,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970264536] [2021-07-09 18:02:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970264536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643154006] [2021-07-09 18:02:35,734 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:35,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:35,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:35,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:35,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643154006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:35,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:35,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 18:02:35,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578294235] [2021-07-09 18:02:35,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:02:35,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:02:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:02:35,805 INFO L87 Difference]: Start difference. First operand 25922 states and 92963 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:36,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:36,034 INFO L93 Difference]: Finished difference Result 26059 states and 93304 transitions. [2021-07-09 18:02:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:02:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:36,105 INFO L225 Difference]: With dead ends: 26059 [2021-07-09 18:02:36,105 INFO L226 Difference]: Without dead ends: 26010 [2021-07-09 18:02:36,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2021-07-09 18:02:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 25935. [2021-07-09 18:02:36,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.5862188632682965) internal successors, (93005), 25934 states have internal predecessors, (93005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 93005 transitions. [2021-07-09 18:02:36,801 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 93005 transitions. Word has length 23 [2021-07-09 18:02:36,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:36,801 INFO L482 AbstractCegarLoop]: Abstraction has 25935 states and 93005 transitions. [2021-07-09 18:02:36,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:36,801 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 93005 transitions. [2021-07-09 18:02:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:36,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:36,834 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:37,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-09 18:02:37,035 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2006065923, now seen corresponding path program 35 times [2021-07-09 18:02:37,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:37,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22105869] [2021-07-09 18:02:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:37,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:37,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22105869] [2021-07-09 18:02:37,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22105869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:37,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729686681] [2021-07-09 18:02:37,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:37,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:37,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:37,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:37,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729686681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:37,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:37,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:02:37,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238752897] [2021-07-09 18:02:37,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:37,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:37,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:37,203 INFO L87 Difference]: Start difference. First operand 25935 states and 93005 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:37,674 INFO L93 Difference]: Finished difference Result 32792 states and 117496 transitions. [2021-07-09 18:02:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:02:37,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:37,898 INFO L225 Difference]: With dead ends: 32792 [2021-07-09 18:02:37,898 INFO L226 Difference]: Without dead ends: 32673 [2021-07-09 18:02:37,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:02:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32673 states. [2021-07-09 18:02:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32673 to 25932. [2021-07-09 18:02:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-07-09 18:02:38,460 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-07-09 18:02:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:38,460 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-07-09 18:02:38,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-07-09 18:02:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:38,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:38,490 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:38,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:38,705 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1745942057, now seen corresponding path program 36 times [2021-07-09 18:02:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:38,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568142474] [2021-07-09 18:02:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:38,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:38,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:38,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568142474] [2021-07-09 18:02:38,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568142474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:38,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198889144] [2021-07-09 18:02:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:38,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:38,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:38,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198889144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:38,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:38,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 18:02:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121673910] [2021-07-09 18:02:38,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:02:38,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:38,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:02:38,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:02:38,847 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:39,099 INFO L93 Difference]: Finished difference Result 26059 states and 93301 transitions. [2021-07-09 18:02:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:02:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-07-09 18:02:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:39,165 INFO L225 Difference]: With dead ends: 26059 [2021-07-09 18:02:39,165 INFO L226 Difference]: Without dead ends: 26016 [2021-07-09 18:02:39,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:39,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2021-07-09 18:02:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 25932. [2021-07-09 18:02:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-07-09 18:02:39,926 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-07-09 18:02:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:39,926 INFO L482 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-07-09 18:02:39,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-07-09 18:02:39,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:39,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:39,957 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:40,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-09 18:02:40,158 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:40,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1767697911, now seen corresponding path program 37 times [2021-07-09 18:02:40,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:40,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539609544] [2021-07-09 18:02:40,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:40,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539609544] [2021-07-09 18:02:40,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539609544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:40,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544822192] [2021-07-09 18:02:40,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:40,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:40,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:40,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544822192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:40,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:40,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:02:40,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389087838] [2021-07-09 18:02:40,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:40,295 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-09 18:02:40,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:40,636 INFO L93 Difference]: Finished difference Result 27582 states and 98159 transitions. [2021-07-09 18:02:40,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:02:40,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 23 [2021-07-09 18:02:40,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:40,925 INFO L225 Difference]: With dead ends: 27582 [2021-07-09 18:02:40,925 INFO L226 Difference]: Without dead ends: 27582 [2021-07-09 18:02:40,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-07-09 18:02:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 26354. [2021-07-09 18:02:41,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26354 states, 26353 states have (on average 3.585436193222783) internal successors, (94487), 26353 states have internal predecessors, (94487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26354 states to 26354 states and 94487 transitions. [2021-07-09 18:02:41,552 INFO L78 Accepts]: Start accepts. Automaton has 26354 states and 94487 transitions. Word has length 23 [2021-07-09 18:02:41,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:41,552 INFO L482 AbstractCegarLoop]: Abstraction has 26354 states and 94487 transitions. [2021-07-09 18:02:41,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-09 18:02:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26354 states and 94487 transitions. [2021-07-09 18:02:41,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:41,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:41,585 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:41,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:41,786 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:41,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128567, now seen corresponding path program 38 times [2021-07-09 18:02:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:41,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926468234] [2021-07-09 18:02:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:41,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:41,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926468234] [2021-07-09 18:02:41,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926468234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:41,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942086872] [2021-07-09 18:02:41,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:41,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:41,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:41,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942086872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:41,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:41,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:02:41,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187000463] [2021-07-09 18:02:41,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:41,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:41,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:41,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:41,922 INFO L87 Difference]: Start difference. First operand 26354 states and 94487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:42,384 INFO L93 Difference]: Finished difference Result 35465 states and 126867 transitions. [2021-07-09 18:02:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:02:42,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:42,479 INFO L225 Difference]: With dead ends: 35465 [2021-07-09 18:02:42,479 INFO L226 Difference]: Without dead ends: 35465 [2021-07-09 18:02:42,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-07-09 18:02:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 25981. [2021-07-09 18:02:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 25980 states have (on average 3.5869515011547346) internal successors, (93189), 25980 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:43,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 93189 transitions. [2021-07-09 18:02:43,180 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 93189 transitions. Word has length 23 [2021-07-09 18:02:43,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:43,180 INFO L482 AbstractCegarLoop]: Abstraction has 25981 states and 93189 transitions. [2021-07-09 18:02:43,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 93189 transitions. [2021-07-09 18:02:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:43,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:43,209 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:43,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-09 18:02:43,409 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:43,410 INFO L82 PathProgramCache]: Analyzing trace with hash 685163967, now seen corresponding path program 39 times [2021-07-09 18:02:43,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:43,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159820182] [2021-07-09 18:02:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:43,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:43,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159820182] [2021-07-09 18:02:43,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159820182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:43,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975473388] [2021-07-09 18:02:43,484 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:43,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:43,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:02:43,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:43,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975473388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:43,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:43,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 18:02:43,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196600777] [2021-07-09 18:02:43,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:02:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:02:43,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:02:43,568 INFO L87 Difference]: Start difference. First operand 25981 states and 93189 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:43,880 INFO L93 Difference]: Finished difference Result 26050 states and 93338 transitions. [2021-07-09 18:02:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:02:43,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-07-09 18:02:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:43,946 INFO L225 Difference]: With dead ends: 26050 [2021-07-09 18:02:43,946 INFO L226 Difference]: Without dead ends: 26007 [2021-07-09 18:02:43,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:02:43,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26007 states. [2021-07-09 18:02:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26007 to 25986. [2021-07-09 18:02:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25986 states, 25985 states have (on average 3.586800076967481) internal successors, (93203), 25985 states have internal predecessors, (93203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25986 states to 25986 states and 93203 transitions. [2021-07-09 18:02:44,498 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 93203 transitions. Word has length 23 [2021-07-09 18:02:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:44,498 INFO L482 AbstractCegarLoop]: Abstraction has 25986 states and 93203 transitions. [2021-07-09 18:02:44,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 93203 transitions. [2021-07-09 18:02:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:44,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:44,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:44,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:44,731 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:44,731 INFO L82 PathProgramCache]: Analyzing trace with hash 706919821, now seen corresponding path program 40 times [2021-07-09 18:02:44,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:44,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594057258] [2021-07-09 18:02:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:44,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:44,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594057258] [2021-07-09 18:02:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594057258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600996232] [2021-07-09 18:02:44,787 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 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 [2021-07-09 18:02:44,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:44,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:02:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:44,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600996232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:44,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:44,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:02:44,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811416877] [2021-07-09 18:02:44,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:44,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:44,860 INFO L87 Difference]: Start difference. First operand 25986 states and 93203 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-09 18:02:45,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:45,154 INFO L93 Difference]: Finished difference Result 29926 states and 106677 transitions. [2021-07-09 18:02:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:02:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 23 [2021-07-09 18:02:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:45,369 INFO L225 Difference]: With dead ends: 29926 [2021-07-09 18:02:45,369 INFO L226 Difference]: Without dead ends: 29926 [2021-07-09 18:02:45,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:02:45,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29926 states. [2021-07-09 18:02:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29926 to 28815. [2021-07-09 18:02:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28815 states, 28814 states have (on average 3.58617338793642) internal successors, (103332), 28814 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28815 states to 28815 states and 103332 transitions. [2021-07-09 18:02:45,929 INFO L78 Accepts]: Start accepts. Automaton has 28815 states and 103332 transitions. Word has length 23 [2021-07-09 18:02:45,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:45,929 INFO L482 AbstractCegarLoop]: Abstraction has 28815 states and 103332 transitions. [2021-07-09 18:02:45,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-07-09 18:02:45,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28815 states and 103332 transitions. [2021-07-09 18:02:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:45,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:45,960 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:46,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:46,161 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:46,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1807581121, now seen corresponding path program 41 times [2021-07-09 18:02:46,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:46,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589354575] [2021-07-09 18:02:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:46,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:46,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589354575] [2021-07-09 18:02:46,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589354575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:46,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306826994] [2021-07-09 18:02:46,195 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:46,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:02:46,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:46,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:46,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306826994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:46,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:46,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 18:02:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640974526] [2021-07-09 18:02:46,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:02:46,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:46,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:02:46,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:02:46,257 INFO L87 Difference]: Start difference. First operand 28815 states and 103332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:46,691 INFO L93 Difference]: Finished difference Result 29526 states and 105293 transitions. [2021-07-09 18:02:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:02:46,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-07-09 18:02:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:46,773 INFO L225 Difference]: With dead ends: 29526 [2021-07-09 18:02:46,773 INFO L226 Difference]: Without dead ends: 29526 [2021-07-09 18:02:46,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2021-07-09 18:02:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 28856. [2021-07-09 18:02:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28856 states, 28855 states have (on average 3.585617743891873) internal successors, (103463), 28855 states have internal predecessors, (103463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28856 states to 28856 states and 103463 transitions. [2021-07-09 18:02:47,432 INFO L78 Accepts]: Start accepts. Automaton has 28856 states and 103463 transitions. Word has length 23 [2021-07-09 18:02:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:47,432 INFO L482 AbstractCegarLoop]: Abstraction has 28856 states and 103463 transitions. [2021-07-09 18:02:47,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-07-09 18:02:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28856 states and 103463 transitions. [2021-07-09 18:02:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:47,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:47,466 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:47,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 18:02:47,667 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash 817141951, now seen corresponding path program 16 times [2021-07-09 18:02:47,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:47,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868797670] [2021-07-09 18:02:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:47,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:47,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868797670] [2021-07-09 18:02:47,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868797670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:47,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214544670] [2021-07-09 18:02:47,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:47,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:02:47,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:47,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:47,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:47,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214544670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:47,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:47,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:02:47,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560205023] [2021-07-09 18:02:47,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:02:47,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:47,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:02:47,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:47,947 INFO L87 Difference]: Start difference. First operand 28856 states and 103463 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:48,140 INFO L93 Difference]: Finished difference Result 29072 states and 104061 transitions. [2021-07-09 18:02:48,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:02:48,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:48,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:48,217 INFO L225 Difference]: With dead ends: 29072 [2021-07-09 18:02:48,217 INFO L226 Difference]: Without dead ends: 29019 [2021-07-09 18:02:48,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29019 states. [2021-07-09 18:02:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29019 to 28851. [2021-07-09 18:02:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28851 states, 28850 states have (on average 3.5844367417677643) internal successors, (103411), 28850 states have internal predecessors, (103411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28851 states to 28851 states and 103411 transitions. [2021-07-09 18:02:48,967 INFO L78 Accepts]: Start accepts. Automaton has 28851 states and 103411 transitions. Word has length 23 [2021-07-09 18:02:48,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:48,967 INFO L482 AbstractCegarLoop]: Abstraction has 28851 states and 103411 transitions. [2021-07-09 18:02:48,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 28851 states and 103411 transitions. [2021-07-09 18:02:49,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:49,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:49,001 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:49,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-09 18:02:49,202 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2049439803, now seen corresponding path program 42 times [2021-07-09 18:02:49,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:49,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036784951] [2021-07-09 18:02:49,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:49,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036784951] [2021-07-09 18:02:49,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036784951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:49,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321626394] [2021-07-09 18:02:49,235 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 [2021-07-09 18:02:49,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:49,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:49,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321626394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:49,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:49,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:02:49,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734931615] [2021-07-09 18:02:49,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:49,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:49,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:49,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:49,318 INFO L87 Difference]: Start difference. First operand 28851 states and 103411 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:49,682 INFO L93 Difference]: Finished difference Result 37800 states and 135115 transitions. [2021-07-09 18:02:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:02:49,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:49,794 INFO L225 Difference]: With dead ends: 37800 [2021-07-09 18:02:49,794 INFO L226 Difference]: Without dead ends: 37800 [2021-07-09 18:02:49,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:02:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states. [2021-07-09 18:02:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37800 to 19949. [2021-07-09 18:02:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 19948 states have (on average 3.5674754361339485) internal successors, (71164), 19948 states have internal predecessors, (71164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:50,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 71164 transitions. [2021-07-09 18:02:50,488 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 71164 transitions. Word has length 23 [2021-07-09 18:02:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:50,488 INFO L482 AbstractCegarLoop]: Abstraction has 19949 states and 71164 transitions. [2021-07-09 18:02:50,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:50,488 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 71164 transitions. [2021-07-09 18:02:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:50,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:50,517 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:50,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:50,718 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1759723389, now seen corresponding path program 43 times [2021-07-09 18:02:50,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:50,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578600851] [2021-07-09 18:02:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:50,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:50,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578600851] [2021-07-09 18:02:50,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578600851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:50,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993915971] [2021-07-09 18:02:50,759 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 [2021-07-09 18:02:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:50,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:50,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993915971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:50,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:50,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:02:50,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50855094] [2021-07-09 18:02:50,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:50,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:50,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:50,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:50,831 INFO L87 Difference]: Start difference. First operand 19949 states and 71164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:51,174 INFO L93 Difference]: Finished difference Result 28786 states and 101970 transitions. [2021-07-09 18:02:51,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:02:51,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:51,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:51,257 INFO L225 Difference]: With dead ends: 28786 [2021-07-09 18:02:51,257 INFO L226 Difference]: Without dead ends: 28786 [2021-07-09 18:02:51,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:02:51,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28786 states. [2021-07-09 18:02:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28786 to 27373. [2021-07-09 18:02:51,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27373 states, 27372 states have (on average 3.5752228554727457) internal successors, (97861), 27372 states have internal predecessors, (97861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27373 states to 27373 states and 97861 transitions. [2021-07-09 18:02:52,025 INFO L78 Accepts]: Start accepts. Automaton has 27373 states and 97861 transitions. Word has length 23 [2021-07-09 18:02:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:52,025 INFO L482 AbstractCegarLoop]: Abstraction has 27373 states and 97861 transitions. [2021-07-09 18:02:52,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27373 states and 97861 transitions. [2021-07-09 18:02:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:52,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:52,060 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:52,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:52,261 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:52,261 INFO L82 PathProgramCache]: Analyzing trace with hash 208892275, now seen corresponding path program 17 times [2021-07-09 18:02:52,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:52,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244417267] [2021-07-09 18:02:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:02:52,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:52,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244417267] [2021-07-09 18:02:52,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244417267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:52,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016255432] [2021-07-09 18:02:52,291 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:02:52,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:02:52,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:02:52,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016255432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:52,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:52,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 18:02:52,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653200629] [2021-07-09 18:02:52,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:02:52,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:52,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:02:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:02:52,372 INFO L87 Difference]: Start difference. First operand 27373 states and 97861 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:52,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:52,602 INFO L93 Difference]: Finished difference Result 27858 states and 99275 transitions. [2021-07-09 18:02:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:02:52,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:52,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:52,686 INFO L225 Difference]: With dead ends: 27858 [2021-07-09 18:02:52,686 INFO L226 Difference]: Without dead ends: 27777 [2021-07-09 18:02:52,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:02:52,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27777 states. [2021-07-09 18:02:53,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27777 to 27398. [2021-07-09 18:02:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27398 states, 27397 states have (on average 3.575135963791656) internal successors, (97948), 27397 states have internal predecessors, (97948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 97948 transitions. [2021-07-09 18:02:53,340 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 97948 transitions. Word has length 23 [2021-07-09 18:02:53,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:53,340 INFO L482 AbstractCegarLoop]: Abstraction has 27398 states and 97948 transitions. [2021-07-09 18:02:53,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 97948 transitions. [2021-07-09 18:02:53,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:53,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:53,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:53,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:53,699 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:53,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:53,699 INFO L82 PathProgramCache]: Analyzing trace with hash 848779567, now seen corresponding path program 44 times [2021-07-09 18:02:53,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:53,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110840882] [2021-07-09 18:02:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:53,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:53,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110840882] [2021-07-09 18:02:53,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110840882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:53,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287188017] [2021-07-09 18:02:53,726 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:53,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:53,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:53,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:53,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:53,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287188017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:53,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:53,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 18:02:53,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228855109] [2021-07-09 18:02:53,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:02:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:02:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:02:53,798 INFO L87 Difference]: Start difference. First operand 27398 states and 97948 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:54,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:54,142 INFO L93 Difference]: Finished difference Result 38461 states and 138552 transitions. [2021-07-09 18:02:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:02:54,143 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:54,247 INFO L225 Difference]: With dead ends: 38461 [2021-07-09 18:02:54,248 INFO L226 Difference]: Without dead ends: 38461 [2021-07-09 18:02:54,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:02:54,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38461 states. [2021-07-09 18:02:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38461 to 24308. [2021-07-09 18:02:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 3.5794215658040893) internal successors, (87005), 24307 states have internal predecessors, (87005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 87005 transitions. [2021-07-09 18:02:54,862 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 87005 transitions. Word has length 23 [2021-07-09 18:02:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:54,862 INFO L482 AbstractCegarLoop]: Abstraction has 24308 states and 87005 transitions. [2021-07-09 18:02:54,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 87005 transitions. [2021-07-09 18:02:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:54,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:54,893 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:55,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-09 18:02:55,094 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:55,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:55,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1907900651, now seen corresponding path program 18 times [2021-07-09 18:02:55,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:55,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381889476] [2021-07-09 18:02:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:55,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381889476] [2021-07-09 18:02:55,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381889476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86821866] [2021-07-09 18:02:55,147 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:55,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:02:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:55,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:55,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86821866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:55,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:55,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:02:55,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300557556] [2021-07-09 18:02:55,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:02:55,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:55,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:02:55,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:55,297 INFO L87 Difference]: Start difference. First operand 24308 states and 87005 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:55,462 INFO L93 Difference]: Finished difference Result 24924 states and 88837 transitions. [2021-07-09 18:02:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:02:55,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:55,530 INFO L225 Difference]: With dead ends: 24924 [2021-07-09 18:02:55,531 INFO L226 Difference]: Without dead ends: 24835 [2021-07-09 18:02:55,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24835 states. [2021-07-09 18:02:56,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24835 to 24301. [2021-07-09 18:02:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 3.579835390946502) internal successors, (86990), 24300 states have internal predecessors, (86990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 86990 transitions. [2021-07-09 18:02:56,122 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 86990 transitions. Word has length 23 [2021-07-09 18:02:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:56,122 INFO L482 AbstractCegarLoop]: Abstraction has 24301 states and 86990 transitions. [2021-07-09 18:02:56,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 86990 transitions. [2021-07-09 18:02:56,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:56,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:56,153 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:56,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-09 18:02:56,353 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash 2012461191, now seen corresponding path program 19 times [2021-07-09 18:02:56,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:56,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062663018] [2021-07-09 18:02:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:56,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:02:56,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:56,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062663018] [2021-07-09 18:02:56,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062663018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:56,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26267328] [2021-07-09 18:02:56,404 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:56,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:02:56,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26267328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:56,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:56,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:02:56,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781483098] [2021-07-09 18:02:56,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:02:56,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:02:56,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:56,464 INFO L87 Difference]: Start difference. First operand 24301 states and 86990 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:56,626 INFO L93 Difference]: Finished difference Result 24748 states and 88285 transitions. [2021-07-09 18:02:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:02:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:56,688 INFO L225 Difference]: With dead ends: 24748 [2021-07-09 18:02:56,688 INFO L226 Difference]: Without dead ends: 24675 [2021-07-09 18:02:56,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-07-09 18:02:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 24351. [2021-07-09 18:02:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.5791786447638603) internal successors, (87153), 24350 states have internal predecessors, (87153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 87153 transitions. [2021-07-09 18:02:57,194 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 87153 transitions. Word has length 23 [2021-07-09 18:02:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:57,194 INFO L482 AbstractCegarLoop]: Abstraction has 24351 states and 87153 transitions. [2021-07-09 18:02:57,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 87153 transitions. [2021-07-09 18:02:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:57,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:57,226 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:57,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 18:02:57,427 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:57,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1545638063, now seen corresponding path program 20 times [2021-07-09 18:02:57,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:57,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545572303] [2021-07-09 18:02:57,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:57,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:57,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:57,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545572303] [2021-07-09 18:02:57,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545572303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:57,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215807914] [2021-07-09 18:02:57,596 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:57,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:02:57,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:57,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:02:57,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:02:57,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215807914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:57,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:57,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:02:57,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794066474] [2021-07-09 18:02:57,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:02:57,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:57,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:02:57,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:57,660 INFO L87 Difference]: Start difference. First operand 24351 states and 87153 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:57,822 INFO L93 Difference]: Finished difference Result 24905 states and 88675 transitions. [2021-07-09 18:02:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:02:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:57,884 INFO L225 Difference]: With dead ends: 24905 [2021-07-09 18:02:57,884 INFO L226 Difference]: Without dead ends: 24844 [2021-07-09 18:02:57,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:02:57,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-07-09 18:02:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24401. [2021-07-09 18:02:58,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 24400 states have (on average 3.5781147540983604) internal successors, (87306), 24400 states have internal predecessors, (87306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 87306 transitions. [2021-07-09 18:02:58,410 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 87306 transitions. Word has length 23 [2021-07-09 18:02:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:02:58,410 INFO L482 AbstractCegarLoop]: Abstraction has 24401 states and 87306 transitions. [2021-07-09 18:02:58,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 87306 transitions. [2021-07-09 18:02:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:02:58,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:02:58,448 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:02:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 18:02:58,649 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:02:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:02:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash 322190439, now seen corresponding path program 45 times [2021-07-09 18:02:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:02:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367183199] [2021-07-09 18:02:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:02:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:02:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:02:58,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367183199] [2021-07-09 18:02:58,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367183199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083672268] [2021-07-09 18:02:58,683 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:02:58,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:02:58,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:02:58,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:02:58,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:02:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:02:58,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083672268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:02:58,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:02:58,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-09 18:02:58,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091879870] [2021-07-09 18:02:58,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:02:58,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:02:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:02:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:02:58,767 INFO L87 Difference]: Start difference. First operand 24401 states and 87306 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:02:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:02:59,316 INFO L93 Difference]: Finished difference Result 66091 states and 236252 transitions. [2021-07-09 18:02:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:02:59,316 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:02:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:02:59,542 INFO L225 Difference]: With dead ends: 66091 [2021-07-09 18:02:59,542 INFO L226 Difference]: Without dead ends: 66077 [2021-07-09 18:02:59,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:02:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-07-09 18:03:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 64280. [2021-07-09 18:03:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 3.5925574448886883) internal successors, (230926), 64279 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 230926 transitions. [2021-07-09 18:03:01,325 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 230926 transitions. Word has length 23 [2021-07-09 18:03:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:01,325 INFO L482 AbstractCegarLoop]: Abstraction has 64280 states and 230926 transitions. [2021-07-09 18:03:01,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 230926 transitions. [2021-07-09 18:03:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:03:01,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:01,408 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:01,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-09 18:03:01,609 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:01,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:01,609 INFO L82 PathProgramCache]: Analyzing trace with hash 749275825, now seen corresponding path program 21 times [2021-07-09 18:03:01,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:01,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067201746] [2021-07-09 18:03:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:01,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067201746] [2021-07-09 18:03:01,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067201746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991727027] [2021-07-09 18:03:01,662 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:01,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:03:01,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:01,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:03:01,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:01,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991727027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:01,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:01,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 18:03:01,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287923840] [2021-07-09 18:03:01,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:03:01,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:01,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:03:01,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:03:01,723 INFO L87 Difference]: Start difference. First operand 64280 states and 230926 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:02,354 INFO L93 Difference]: Finished difference Result 64761 states and 232372 transitions. [2021-07-09 18:03:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:03:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:03:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:02,571 INFO L225 Difference]: With dead ends: 64761 [2021-07-09 18:03:02,571 INFO L226 Difference]: Without dead ends: 64712 [2021-07-09 18:03:02,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:03:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64712 states. [2021-07-09 18:03:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64712 to 64330. [2021-07-09 18:03:03,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64330 states, 64329 states have (on average 3.592516594382005) internal successors, (231103), 64329 states have internal predecessors, (231103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64330 states to 64330 states and 231103 transitions. [2021-07-09 18:03:04,239 INFO L78 Accepts]: Start accepts. Automaton has 64330 states and 231103 transitions. Word has length 23 [2021-07-09 18:03:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:04,239 INFO L482 AbstractCegarLoop]: Abstraction has 64330 states and 231103 transitions. [2021-07-09 18:03:04,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 64330 states and 231103 transitions. [2021-07-09 18:03:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:04,336 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:04,336 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:04,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 18:03:04,536 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:04,537 INFO L82 PathProgramCache]: Analyzing trace with hash -854673189, now seen corresponding path program 21 times [2021-07-09 18:03:04,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:04,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144244472] [2021-07-09 18:03:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:04,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144244472] [2021-07-09 18:03:04,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144244472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:04,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466299494] [2021-07-09 18:03:04,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:04,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:03:04,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:04,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:03:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:04,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466299494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:04,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:04,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 18:03:04,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197679943] [2021-07-09 18:03:04,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:03:04,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:04,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:03:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:03:04,647 INFO L87 Difference]: Start difference. First operand 64330 states and 231103 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:05,742 INFO L93 Difference]: Finished difference Result 123260 states and 445775 transitions. [2021-07-09 18:03:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:03:05,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:05,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:06,550 INFO L225 Difference]: With dead ends: 123260 [2021-07-09 18:03:06,550 INFO L226 Difference]: Without dead ends: 123260 [2021-07-09 18:03:06,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:03:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123260 states. [2021-07-09 18:03:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123260 to 75397. [2021-07-09 18:03:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75397 states, 75396 states have (on average 3.5951376730861053) internal successors, (271059), 75396 states have internal predecessors, (271059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75397 states to 75397 states and 271059 transitions. [2021-07-09 18:03:09,036 INFO L78 Accepts]: Start accepts. Automaton has 75397 states and 271059 transitions. Word has length 25 [2021-07-09 18:03:09,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:09,036 INFO L482 AbstractCegarLoop]: Abstraction has 75397 states and 271059 transitions. [2021-07-09 18:03:09,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:09,036 INFO L276 IsEmpty]: Start isEmpty. Operand 75397 states and 271059 transitions. [2021-07-09 18:03:09,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:09,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:09,155 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:09,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:09,357 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1488955305, now seen corresponding path program 46 times [2021-07-09 18:03:09,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:09,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286220433] [2021-07-09 18:03:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:09,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:09,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286220433] [2021-07-09 18:03:09,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286220433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:09,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26733851] [2021-07-09 18:03:09,428 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 [2021-07-09 18:03:09,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:09,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:09,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:03:09,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26733851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:09,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:09,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 18:03:09,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889928413] [2021-07-09 18:03:09,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:03:09,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:09,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:03:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:03:09,513 INFO L87 Difference]: Start difference. First operand 75397 states and 271059 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:10,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:10,301 INFO L93 Difference]: Finished difference Result 76364 states and 274028 transitions. [2021-07-09 18:03:10,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:03:10,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:10,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:10,575 INFO L225 Difference]: With dead ends: 76364 [2021-07-09 18:03:10,575 INFO L226 Difference]: Without dead ends: 76324 [2021-07-09 18:03:10,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:03:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76324 states. [2021-07-09 18:03:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76324 to 75532. [2021-07-09 18:03:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75532 states, 75531 states have (on average 3.5951993221326344) internal successors, (271549), 75531 states have internal predecessors, (271549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75532 states to 75532 states and 271549 transitions. [2021-07-09 18:03:12,491 INFO L78 Accepts]: Start accepts. Automaton has 75532 states and 271549 transitions. Word has length 25 [2021-07-09 18:03:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:12,491 INFO L482 AbstractCegarLoop]: Abstraction has 75532 states and 271549 transitions. [2021-07-09 18:03:12,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 75532 states and 271549 transitions. [2021-07-09 18:03:12,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:12,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:12,609 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:12,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:12,809 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:12,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:12,810 INFO L82 PathProgramCache]: Analyzing trace with hash 608516245, now seen corresponding path program 47 times [2021-07-09 18:03:12,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:12,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515405319] [2021-07-09 18:03:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:12,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515405319] [2021-07-09 18:03:12,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515405319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:12,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302141596] [2021-07-09 18:03:12,860 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 [2021-07-09 18:03:12,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:03:12,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:03:12,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:12,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302141596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:12,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:12,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 18:03:12,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837710957] [2021-07-09 18:03:12,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:03:12,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:12,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:03:12,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:03:12,924 INFO L87 Difference]: Start difference. First operand 75532 states and 271549 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:13,657 INFO L93 Difference]: Finished difference Result 77328 states and 277251 transitions. [2021-07-09 18:03:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:03:13,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:14,127 INFO L225 Difference]: With dead ends: 77328 [2021-07-09 18:03:14,127 INFO L226 Difference]: Without dead ends: 77263 [2021-07-09 18:03:14,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:03:14,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-07-09 18:03:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 75779. [2021-07-09 18:03:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75779 states, 75778 states have (on average 3.595476259600412) internal successors, (272458), 75778 states have internal predecessors, (272458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75779 states to 75779 states and 272458 transitions. [2021-07-09 18:03:15,755 INFO L78 Accepts]: Start accepts. Automaton has 75779 states and 272458 transitions. Word has length 25 [2021-07-09 18:03:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:15,755 INFO L482 AbstractCegarLoop]: Abstraction has 75779 states and 272458 transitions. [2021-07-09 18:03:15,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:15,755 INFO L276 IsEmpty]: Start isEmpty. Operand 75779 states and 272458 transitions. [2021-07-09 18:03:16,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:16,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:16,128 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:16,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:16,343 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:16,343 INFO L82 PathProgramCache]: Analyzing trace with hash -924915699, now seen corresponding path program 48 times [2021-07-09 18:03:16,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:16,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503268503] [2021-07-09 18:03:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:16,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503268503] [2021-07-09 18:03:16,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503268503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:16,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342440316] [2021-07-09 18:03:16,384 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 [2021-07-09 18:03:16,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:03:16,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:03:16,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:16,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342440316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:16,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:16,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:03:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646592369] [2021-07-09 18:03:16,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:03:16,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:16,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:03:16,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:16,457 INFO L87 Difference]: Start difference. First operand 75779 states and 272458 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:17,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:17,152 INFO L93 Difference]: Finished difference Result 77024 states and 276140 transitions. [2021-07-09 18:03:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:03:17,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:17,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:17,432 INFO L225 Difference]: With dead ends: 77024 [2021-07-09 18:03:17,432 INFO L226 Difference]: Without dead ends: 76999 [2021-07-09 18:03:17,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:17,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-07-09 18:03:18,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 75956. [2021-07-09 18:03:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75956 states, 75955 states have (on average 3.595707984991113) internal successors, (273112), 75955 states have internal predecessors, (273112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75956 states to 75956 states and 273112 transitions. [2021-07-09 18:03:19,370 INFO L78 Accepts]: Start accepts. Automaton has 75956 states and 273112 transitions. Word has length 25 [2021-07-09 18:03:19,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:19,370 INFO L482 AbstractCegarLoop]: Abstraction has 75956 states and 273112 transitions. [2021-07-09 18:03:19,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:19,370 INFO L276 IsEmpty]: Start isEmpty. Operand 75956 states and 273112 transitions. [2021-07-09 18:03:19,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:19,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:19,494 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:19,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-07-09 18:03:19,699 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1967521705, now seen corresponding path program 49 times [2021-07-09 18:03:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:19,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133976989] [2021-07-09 18:03:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:19,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133976989] [2021-07-09 18:03:19,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133976989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075317593] [2021-07-09 18:03:19,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:03:19,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:19,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075317593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:19,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:19,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:03:19,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545238389] [2021-07-09 18:03:19,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:03:19,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:19,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:03:19,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:19,824 INFO L87 Difference]: Start difference. First operand 75956 states and 273112 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:20,593 INFO L93 Difference]: Finished difference Result 77120 states and 276543 transitions. [2021-07-09 18:03:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:03:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:20,870 INFO L225 Difference]: With dead ends: 77120 [2021-07-09 18:03:20,870 INFO L226 Difference]: Without dead ends: 77074 [2021-07-09 18:03:20,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77074 states. [2021-07-09 18:03:22,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77074 to 76028. [2021-07-09 18:03:22,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 3.596209241453694) internal successors, (273409), 76027 states have internal predecessors, (273409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 273409 transitions. [2021-07-09 18:03:22,938 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 273409 transitions. Word has length 25 [2021-07-09 18:03:22,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:22,938 INFO L482 AbstractCegarLoop]: Abstraction has 76028 states and 273409 transitions. [2021-07-09 18:03:22,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:22,938 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 273409 transitions. [2021-07-09 18:03:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:23,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:23,070 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:23,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:23,271 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:23,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1225531439, now seen corresponding path program 50 times [2021-07-09 18:03:23,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:23,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714738294] [2021-07-09 18:03:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:03:23,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714738294] [2021-07-09 18:03:23,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714738294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234170371] [2021-07-09 18:03:23,329 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 [2021-07-09 18:03:23,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:23,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:03:23,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:03:23,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234170371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:23,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:23,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 18:03:23,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935120709] [2021-07-09 18:03:23,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 18:03:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 18:03:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:23,416 INFO L87 Difference]: Start difference. First operand 76028 states and 273409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:24,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:24,168 INFO L93 Difference]: Finished difference Result 77628 states and 278332 transitions. [2021-07-09 18:03:24,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:03:24,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:24,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:24,419 INFO L225 Difference]: With dead ends: 77628 [2021-07-09 18:03:24,419 INFO L226 Difference]: Without dead ends: 77580 [2021-07-09 18:03:24,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:03:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77580 states. [2021-07-09 18:03:25,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77580 to 76129. [2021-07-09 18:03:26,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76129 states, 76128 states have (on average 3.596876313577133) internal successors, (273823), 76128 states have internal predecessors, (273823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76129 states to 76129 states and 273823 transitions. [2021-07-09 18:03:26,360 INFO L78 Accepts]: Start accepts. Automaton has 76129 states and 273823 transitions. Word has length 25 [2021-07-09 18:03:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:26,360 INFO L482 AbstractCegarLoop]: Abstraction has 76129 states and 273823 transitions. [2021-07-09 18:03:26,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 76129 states and 273823 transitions. [2021-07-09 18:03:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:26,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:26,485 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:26,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-09 18:03:26,685 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1862961165, now seen corresponding path program 51 times [2021-07-09 18:03:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:26,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286248630] [2021-07-09 18:03:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:26,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:26,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286248630] [2021-07-09 18:03:26,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286248630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568226669] [2021-07-09 18:03:26,759 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 [2021-07-09 18:03:27,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:03:27,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:27,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:03:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:27,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568226669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:27,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:27,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 18:03:27,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755581587] [2021-07-09 18:03:27,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:03:27,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:03:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:03:27,111 INFO L87 Difference]: Start difference. First operand 76129 states and 273823 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:27,608 INFO L93 Difference]: Finished difference Result 79341 states and 284167 transitions. [2021-07-09 18:03:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:03:27,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:28,093 INFO L225 Difference]: With dead ends: 79341 [2021-07-09 18:03:28,093 INFO L226 Difference]: Without dead ends: 79297 [2021-07-09 18:03:28,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:03:28,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79297 states. [2021-07-09 18:03:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79297 to 76278. [2021-07-09 18:03:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76278 states, 76277 states have (on average 3.598096411762392) internal successors, (274452), 76277 states have internal predecessors, (274452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76278 states to 76278 states and 274452 transitions. [2021-07-09 18:03:30,098 INFO L78 Accepts]: Start accepts. Automaton has 76278 states and 274452 transitions. Word has length 25 [2021-07-09 18:03:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:30,098 INFO L482 AbstractCegarLoop]: Abstraction has 76278 states and 274452 transitions. [2021-07-09 18:03:30,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 76278 states and 274452 transitions. [2021-07-09 18:03:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:30,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:30,233 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:30,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-09 18:03:30,434 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1408824429, now seen corresponding path program 22 times [2021-07-09 18:03:30,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:30,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703155273] [2021-07-09 18:03:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:30,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:30,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703155273] [2021-07-09 18:03:30,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703155273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:30,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113028001] [2021-07-09 18:03:30,463 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 [2021-07-09 18:03:30,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:30,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:30,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:03:30,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:30,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113028001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:30,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:30,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:03:30,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341334590] [2021-07-09 18:03:30,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:03:30,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:03:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:03:30,546 INFO L87 Difference]: Start difference. First operand 76278 states and 274452 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:31,499 INFO L93 Difference]: Finished difference Result 98993 states and 359845 transitions. [2021-07-09 18:03:31,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:03:31,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:31,883 INFO L225 Difference]: With dead ends: 98993 [2021-07-09 18:03:31,884 INFO L226 Difference]: Without dead ends: 98979 [2021-07-09 18:03:31,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:03:31,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98979 states. [2021-07-09 18:03:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98979 to 21029. [2021-07-09 18:03:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 3.6255468898611376) internal successors, (76238), 21028 states have internal predecessors, (76238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 76238 transitions. [2021-07-09 18:03:33,223 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 76238 transitions. Word has length 25 [2021-07-09 18:03:33,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:33,224 INFO L482 AbstractCegarLoop]: Abstraction has 21029 states and 76238 transitions. [2021-07-09 18:03:33,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 76238 transitions. [2021-07-09 18:03:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:33,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:33,258 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:33,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-09 18:03:33,459 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:33,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1278968941, now seen corresponding path program 23 times [2021-07-09 18:03:33,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:33,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985137836] [2021-07-09 18:03:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:33,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985137836] [2021-07-09 18:03:33,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985137836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:33,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177266170] [2021-07-09 18:03:33,493 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 [2021-07-09 18:03:33,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:03:33,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:33,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:03:33,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:33,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177266170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:33,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:33,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:03:33,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381247452] [2021-07-09 18:03:33,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:03:33,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:03:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:03:33,592 INFO L87 Difference]: Start difference. First operand 21029 states and 76238 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:34,142 INFO L93 Difference]: Finished difference Result 52085 states and 187899 transitions. [2021-07-09 18:03:34,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:03:34,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-07-09 18:03:34,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:34,325 INFO L225 Difference]: With dead ends: 52085 [2021-07-09 18:03:34,325 INFO L226 Difference]: Without dead ends: 52085 [2021-07-09 18:03:34,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:03:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52085 states. [2021-07-09 18:03:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52085 to 48537. [2021-07-09 18:03:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48537 states, 48536 states have (on average 3.635569474204714) internal successors, (176456), 48536 states have internal predecessors, (176456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48537 states to 48537 states and 176456 transitions. [2021-07-09 18:03:35,604 INFO L78 Accepts]: Start accepts. Automaton has 48537 states and 176456 transitions. Word has length 25 [2021-07-09 18:03:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:35,604 INFO L482 AbstractCegarLoop]: Abstraction has 48537 states and 176456 transitions. [2021-07-09 18:03:35,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 48537 states and 176456 transitions. [2021-07-09 18:03:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:35,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:35,681 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:35,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 18:03:35,881 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:35,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:35,882 INFO L82 PathProgramCache]: Analyzing trace with hash -793164837, now seen corresponding path program 24 times [2021-07-09 18:03:35,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:35,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352154000] [2021-07-09 18:03:35,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:35,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:35,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352154000] [2021-07-09 18:03:35,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352154000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:35,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875567765] [2021-07-09 18:03:35,912 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 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 [2021-07-09 18:03:35,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:03:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:03:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:36,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875567765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:36,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:36,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-09 18:03:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070744821] [2021-07-09 18:03:36,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:03:36,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:03:36,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:03:36,003 INFO L87 Difference]: Start difference. First operand 48537 states and 176456 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:36,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:36,779 INFO L93 Difference]: Finished difference Result 60283 states and 218124 transitions. [2021-07-09 18:03:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:03:36,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-07-09 18:03:36,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:37,148 INFO L225 Difference]: With dead ends: 60283 [2021-07-09 18:03:37,148 INFO L226 Difference]: Without dead ends: 60283 [2021-07-09 18:03:37,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:03:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60283 states. [2021-07-09 18:03:38,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60283 to 48697. [2021-07-09 18:03:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48697 states, 48696 states have (on average 3.6408739937571872) internal successors, (177296), 48696 states have internal predecessors, (177296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48697 states to 48697 states and 177296 transitions. [2021-07-09 18:03:38,496 INFO L78 Accepts]: Start accepts. Automaton has 48697 states and 177296 transitions. Word has length 25 [2021-07-09 18:03:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:38,496 INFO L482 AbstractCegarLoop]: Abstraction has 48697 states and 177296 transitions. [2021-07-09 18:03:38,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 48697 states and 177296 transitions. [2021-07-09 18:03:38,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:38,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:38,567 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:38,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:38,778 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:38,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1183569831, now seen corresponding path program 52 times [2021-07-09 18:03:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:38,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36652957] [2021-07-09 18:03:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:38,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36652957] [2021-07-09 18:03:38,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36652957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:38,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307116318] [2021-07-09 18:03:38,848 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 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 [2021-07-09 18:03:38,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:38,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:38,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307116318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:38,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:38,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:03:38,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644245769] [2021-07-09 18:03:38,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:03:38,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:03:38,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:03:38,979 INFO L87 Difference]: Start difference. First operand 48697 states and 177296 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:39,652 INFO L93 Difference]: Finished difference Result 49947 states and 180898 transitions. [2021-07-09 18:03:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:03:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:39,820 INFO L225 Difference]: With dead ends: 49947 [2021-07-09 18:03:39,820 INFO L226 Difference]: Without dead ends: 49819 [2021-07-09 18:03:39,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:03:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49819 states. [2021-07-09 18:03:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49819 to 48821. [2021-07-09 18:03:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 3.6405981155264238) internal successors, (177734), 48820 states have internal predecessors, (177734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 177734 transitions. [2021-07-09 18:03:40,820 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 177734 transitions. Word has length 25 [2021-07-09 18:03:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:40,820 INFO L482 AbstractCegarLoop]: Abstraction has 48821 states and 177734 transitions. [2021-07-09 18:03:40,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 177734 transitions. [2021-07-09 18:03:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:41,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:41,123 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:41,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:41,337 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -735311471, now seen corresponding path program 53 times [2021-07-09 18:03:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:41,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645075071] [2021-07-09 18:03:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:41,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:41,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645075071] [2021-07-09 18:03:41,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645075071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:41,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655031906] [2021-07-09 18:03:41,408 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 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 [2021-07-09 18:03:41,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:03:41,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655031906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:41,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:41,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:03:41,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400588389] [2021-07-09 18:03:41,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:03:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:41,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:03:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:03:41,541 INFO L87 Difference]: Start difference. First operand 48821 states and 177734 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:41,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:41,954 INFO L93 Difference]: Finished difference Result 49466 states and 179432 transitions. [2021-07-09 18:03:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:03:41,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:42,307 INFO L225 Difference]: With dead ends: 49466 [2021-07-09 18:03:42,308 INFO L226 Difference]: Without dead ends: 49403 [2021-07-09 18:03:42,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:03:42,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49403 states. [2021-07-09 18:03:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49403 to 48835. [2021-07-09 18:03:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48835 states, 48834 states have (on average 3.640312077650817) internal successors, (177771), 48834 states have internal predecessors, (177771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48835 states to 48835 states and 177771 transitions. [2021-07-09 18:03:43,242 INFO L78 Accepts]: Start accepts. Automaton has 48835 states and 177771 transitions. Word has length 25 [2021-07-09 18:03:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:43,242 INFO L482 AbstractCegarLoop]: Abstraction has 48835 states and 177771 transitions. [2021-07-09 18:03:43,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 48835 states and 177771 transitions. [2021-07-09 18:03:43,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:43,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:43,312 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:43,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-09 18:03:43,513 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:43,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1650392959, now seen corresponding path program 54 times [2021-07-09 18:03:43,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:43,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858269246] [2021-07-09 18:03:43,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:43,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858269246] [2021-07-09 18:03:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858269246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:43,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631165695] [2021-07-09 18:03:43,568 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 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 [2021-07-09 18:03:43,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:03:43,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:43,836 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-07-09 18:03:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:43,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631165695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:43,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:43,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:03:43,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758183581] [2021-07-09 18:03:43,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:03:43,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:43,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:03:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:03:43,889 INFO L87 Difference]: Start difference. First operand 48835 states and 177771 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:44,435 INFO L93 Difference]: Finished difference Result 50050 states and 181095 transitions. [2021-07-09 18:03:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:03:44,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:44,604 INFO L225 Difference]: With dead ends: 50050 [2021-07-09 18:03:44,604 INFO L226 Difference]: Without dead ends: 49977 [2021-07-09 18:03:44,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:03:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49977 states. [2021-07-09 18:03:45,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49977 to 48876. [2021-07-09 18:03:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48876 states, 48875 states have (on average 3.6402046035805626) internal successors, (177915), 48875 states have internal predecessors, (177915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48876 states to 48876 states and 177915 transitions. [2021-07-09 18:03:45,767 INFO L78 Accepts]: Start accepts. Automaton has 48876 states and 177915 transitions. Word has length 25 [2021-07-09 18:03:45,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:45,767 INFO L482 AbstractCegarLoop]: Abstraction has 48876 states and 177915 transitions. [2021-07-09 18:03:45,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 48876 states and 177915 transitions. [2021-07-09 18:03:45,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:45,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:45,841 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:46,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:46,042 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:46,042 INFO L82 PathProgramCache]: Analyzing trace with hash 697526461, now seen corresponding path program 55 times [2021-07-09 18:03:46,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:46,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780128125] [2021-07-09 18:03:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:46,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:46,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780128125] [2021-07-09 18:03:46,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780128125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:46,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688540599] [2021-07-09 18:03:46,100 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 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 [2021-07-09 18:03:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:46,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:46,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688540599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:46,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:46,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:03:46,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606707730] [2021-07-09 18:03:46,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:03:46,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:03:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:03:46,234 INFO L87 Difference]: Start difference. First operand 48876 states and 177915 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:46,512 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-07-09 18:03:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:46,891 INFO L93 Difference]: Finished difference Result 49588 states and 179721 transitions. [2021-07-09 18:03:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:03:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:47,051 INFO L225 Difference]: With dead ends: 49588 [2021-07-09 18:03:47,051 INFO L226 Difference]: Without dead ends: 49563 [2021-07-09 18:03:47,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:03:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49563 states. [2021-07-09 18:03:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49563 to 48888. [2021-07-09 18:03:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48888 states, 48887 states have (on average 3.6404770184302575) internal successors, (177972), 48887 states have internal predecessors, (177972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48888 states to 48888 states and 177972 transitions. [2021-07-09 18:03:48,196 INFO L78 Accepts]: Start accepts. Automaton has 48888 states and 177972 transitions. Word has length 25 [2021-07-09 18:03:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:48,197 INFO L482 AbstractCegarLoop]: Abstraction has 48888 states and 177972 transitions. [2021-07-09 18:03:48,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48888 states and 177972 transitions. [2021-07-09 18:03:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:48,271 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:48,271 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:48,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:03:48,477 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:48,477 INFO L82 PathProgramCache]: Analyzing trace with hash 982042531, now seen corresponding path program 56 times [2021-07-09 18:03:48,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:48,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462525116] [2021-07-09 18:03:48,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:48,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462525116] [2021-07-09 18:03:48,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462525116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218239198] [2021-07-09 18:03:48,550 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 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 [2021-07-09 18:03:48,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:03:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:48,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:48,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:48,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218239198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:48,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:48,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:03:48,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478827785] [2021-07-09 18:03:48,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:03:48,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:03:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:03:48,664 INFO L87 Difference]: Start difference. First operand 48888 states and 177972 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:49,264 INFO L93 Difference]: Finished difference Result 50065 states and 181714 transitions. [2021-07-09 18:03:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:03:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:49,428 INFO L225 Difference]: With dead ends: 50065 [2021-07-09 18:03:49,428 INFO L226 Difference]: Without dead ends: 49947 [2021-07-09 18:03:49,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:03:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49947 states. [2021-07-09 18:03:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49947 to 49035. [2021-07-09 18:03:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.640331198760044) internal successors, (178500), 49034 states have internal predecessors, (178500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:50,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 178500 transitions. [2021-07-09 18:03:50,669 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 178500 transitions. Word has length 25 [2021-07-09 18:03:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:50,669 INFO L482 AbstractCegarLoop]: Abstraction has 49035 states and 178500 transitions. [2021-07-09 18:03:50,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:50,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 178500 transitions. [2021-07-09 18:03:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:50,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:50,743 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:50,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:50,944 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1430300891, now seen corresponding path program 57 times [2021-07-09 18:03:50,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:50,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8376394] [2021-07-09 18:03:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:51,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:51,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8376394] [2021-07-09 18:03:51,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8376394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:51,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333772047] [2021-07-09 18:03:51,002 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 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 [2021-07-09 18:03:51,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:03:51,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:51,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:51,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333772047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:51,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:51,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:03:51,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777661525] [2021-07-09 18:03:51,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:03:51,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:03:51,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:03:51,138 INFO L87 Difference]: Start difference. First operand 49035 states and 178500 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:51,746 INFO L93 Difference]: Finished difference Result 49758 states and 180665 transitions. [2021-07-09 18:03:51,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:03:51,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:51,928 INFO L225 Difference]: With dead ends: 49758 [2021-07-09 18:03:51,929 INFO L226 Difference]: Without dead ends: 49695 [2021-07-09 18:03:51,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:03:51,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49695 states. [2021-07-09 18:03:52,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49695 to 49053. [2021-07-09 18:03:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49053 states, 49052 states have (on average 3.640218543586398) internal successors, (178560), 49052 states have internal predecessors, (178560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:53,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49053 states to 49053 states and 178560 transitions. [2021-07-09 18:03:53,188 INFO L78 Accepts]: Start accepts. Automaton has 49053 states and 178560 transitions. Word has length 25 [2021-07-09 18:03:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:53,188 INFO L482 AbstractCegarLoop]: Abstraction has 49053 states and 178560 transitions. [2021-07-09 18:03:53,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 49053 states and 178560 transitions. [2021-07-09 18:03:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:53,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:53,261 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-07-09 18:03:53,461 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash 515219403, now seen corresponding path program 58 times [2021-07-09 18:03:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288955457] [2021-07-09 18:03:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:53,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:53,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288955457] [2021-07-09 18:03:53,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288955457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:53,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232782540] [2021-07-09 18:03:53,528 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 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 [2021-07-09 18:03:53,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:03:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:03:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232782540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:53,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:53,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:03:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851099032] [2021-07-09 18:03:53,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:03:53,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:03:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:03:53,667 INFO L87 Difference]: Start difference. First operand 49053 states and 178560 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:54,400 INFO L93 Difference]: Finished difference Result 50900 states and 184438 transitions. [2021-07-09 18:03:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:03:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:54,556 INFO L225 Difference]: With dead ends: 50900 [2021-07-09 18:03:54,556 INFO L226 Difference]: Without dead ends: 50875 [2021-07-09 18:03:54,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 182.0ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:03:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2021-07-09 18:03:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 49168. [2021-07-09 18:03:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.642280391319381) internal successors, (179080), 49167 states have internal predecessors, (179080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 179080 transitions. [2021-07-09 18:03:55,782 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 179080 transitions. Word has length 25 [2021-07-09 18:03:55,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:55,783 INFO L482 AbstractCegarLoop]: Abstraction has 49168 states and 179080 transitions. [2021-07-09 18:03:55,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 179080 transitions. [2021-07-09 18:03:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:55,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:55,852 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:03:56,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-07-09 18:03:56,053 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:03:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:03:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash -434468137, now seen corresponding path program 59 times [2021-07-09 18:03:56,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:03:56,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435539964] [2021-07-09 18:03:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:03:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:03:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:56,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:03:56,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435539964] [2021-07-09 18:03:56,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435539964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:56,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846402723] [2021-07-09 18:03:56,087 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:03:56,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:03:56,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:03:56,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:03:56,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:03:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:03:56,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846402723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:03:56,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:03:56,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-07-09 18:03:56,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712273927] [2021-07-09 18:03:56,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:03:56,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:03:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:03:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:03:56,189 INFO L87 Difference]: Start difference. First operand 49168 states and 179080 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:56,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:03:56,970 INFO L93 Difference]: Finished difference Result 92519 states and 337531 transitions. [2021-07-09 18:03:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:03:56,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:03:56,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:03:57,517 INFO L225 Difference]: With dead ends: 92519 [2021-07-09 18:03:57,517 INFO L226 Difference]: Without dead ends: 92495 [2021-07-09 18:03:57,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:03:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92495 states. [2021-07-09 18:03:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92495 to 90624. [2021-07-09 18:03:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90624 states, 90623 states have (on average 3.6490736347284907) internal successors, (330690), 90623 states have internal predecessors, (330690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90624 states to 90624 states and 330690 transitions. [2021-07-09 18:03:59,743 INFO L78 Accepts]: Start accepts. Automaton has 90624 states and 330690 transitions. Word has length 25 [2021-07-09 18:03:59,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:03:59,744 INFO L482 AbstractCegarLoop]: Abstraction has 90624 states and 330690 transitions. [2021-07-09 18:03:59,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:03:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 90624 states and 330690 transitions. [2021-07-09 18:03:59,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:03:59,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:03:59,886 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:00,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-09 18:04:00,086 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:00,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:00,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1866838691, now seen corresponding path program 60 times [2021-07-09 18:04:00,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:00,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952225797] [2021-07-09 18:04:00,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952225797] [2021-07-09 18:04:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952225797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:00,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471829538] [2021-07-09 18:04:00,117 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 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 [2021-07-09 18:04:00,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:04:00,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:00,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:04:00,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:00,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471829538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:00,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:00,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 18:04:00,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847428871] [2021-07-09 18:04:00,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:04:00,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:04:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:04:00,225 INFO L87 Difference]: Start difference. First operand 90624 states and 330690 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:01,663 INFO L93 Difference]: Finished difference Result 137171 states and 502327 transitions. [2021-07-09 18:04:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:04:01,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:04:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:02,233 INFO L225 Difference]: With dead ends: 137171 [2021-07-09 18:04:02,234 INFO L226 Difference]: Without dead ends: 137155 [2021-07-09 18:04:02,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:04:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137155 states. [2021-07-09 18:04:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137155 to 75753. [2021-07-09 18:04:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 3.641699229063259) internal successors, (275866), 75752 states have internal predecessors, (275866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 275866 transitions. [2021-07-09 18:04:05,016 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 275866 transitions. Word has length 25 [2021-07-09 18:04:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:05,016 INFO L482 AbstractCegarLoop]: Abstraction has 75753 states and 275866 transitions. [2021-07-09 18:04:05,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 275866 transitions. [2021-07-09 18:04:05,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:05,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:05,143 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:05,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:05,344 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2025324127, now seen corresponding path program 61 times [2021-07-09 18:04:05,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:05,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168779959] [2021-07-09 18:04:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:05,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168779959] [2021-07-09 18:04:05,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168779959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:05,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104289819] [2021-07-09 18:04:05,412 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 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 [2021-07-09 18:04:05,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:05,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104289819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:05,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:05,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:04:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617855856] [2021-07-09 18:04:05,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:04:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:04:05,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:04:05,533 INFO L87 Difference]: Start difference. First operand 75753 states and 275866 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:06,360 INFO L93 Difference]: Finished difference Result 76022 states and 276650 transitions. [2021-07-09 18:04:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:04:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-09 18:04:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:06,626 INFO L225 Difference]: With dead ends: 76022 [2021-07-09 18:04:06,626 INFO L226 Difference]: Without dead ends: 75973 [2021-07-09 18:04:06,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:04:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75973 states. [2021-07-09 18:04:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75973 to 75785. [2021-07-09 18:04:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75785 states, 75784 states have (on average 3.6417317639607303) internal successors, (275985), 75784 states have internal predecessors, (275985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75785 states to 75785 states and 275985 transitions. [2021-07-09 18:04:08,791 INFO L78 Accepts]: Start accepts. Automaton has 75785 states and 275985 transitions. Word has length 25 [2021-07-09 18:04:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:08,791 INFO L482 AbstractCegarLoop]: Abstraction has 75785 states and 275985 transitions. [2021-07-09 18:04:08,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75785 states and 275985 transitions. [2021-07-09 18:04:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:08,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:08,911 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:09,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:09,112 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1144885067, now seen corresponding path program 62 times [2021-07-09 18:04:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272402734] [2021-07-09 18:04:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:09,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272402734] [2021-07-09 18:04:09,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272402734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:09,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798278579] [2021-07-09 18:04:09,172 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 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 [2021-07-09 18:04:09,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:09,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:09,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:09,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798278579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:09,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:09,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:04:09,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772930389] [2021-07-09 18:04:09,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:04:09,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:09,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:04:09,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:04:09,268 INFO L87 Difference]: Start difference. First operand 75785 states and 275985 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:10,041 INFO L93 Difference]: Finished difference Result 76818 states and 279184 transitions. [2021-07-09 18:04:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:04:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-07-09 18:04:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:10,312 INFO L225 Difference]: With dead ends: 76818 [2021-07-09 18:04:10,312 INFO L226 Difference]: Without dead ends: 76793 [2021-07-09 18:04:10,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:04:10,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76793 states. [2021-07-09 18:04:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76793 to 75828. [2021-07-09 18:04:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75828 states, 75827 states have (on average 3.6418821791710076) internal successors, (276153), 75827 states have internal predecessors, (276153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75828 states to 75828 states and 276153 transitions. [2021-07-09 18:04:12,575 INFO L78 Accepts]: Start accepts. Automaton has 75828 states and 276153 transitions. Word has length 25 [2021-07-09 18:04:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:12,575 INFO L482 AbstractCegarLoop]: Abstraction has 75828 states and 276153 transitions. [2021-07-09 18:04:12,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75828 states and 276153 transitions. [2021-07-09 18:04:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:12,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:12,700 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:12,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:12,901 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:12,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1821384809, now seen corresponding path program 63 times [2021-07-09 18:04:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:12,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079245131] [2021-07-09 18:04:12,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:12,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079245131] [2021-07-09 18:04:12,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079245131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497378076] [2021-07-09 18:04:12,966 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 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 [2021-07-09 18:04:12,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:04:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:12,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:13,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497378076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:13,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:13,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 18:04:13,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399802360] [2021-07-09 18:04:13,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:04:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:04:13,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:04:13,074 INFO L87 Difference]: Start difference. First operand 75828 states and 276153 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:13,929 INFO L93 Difference]: Finished difference Result 76411 states and 277746 transitions. [2021-07-09 18:04:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:04:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:04:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:14,187 INFO L225 Difference]: With dead ends: 76411 [2021-07-09 18:04:14,188 INFO L226 Difference]: Without dead ends: 76386 [2021-07-09 18:04:14,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:04:14,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76386 states. [2021-07-09 18:04:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76386 to 75829. [2021-07-09 18:04:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75829 states, 75828 states have (on average 3.641966028380018) internal successors, (276163), 75828 states have internal predecessors, (276163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75829 states to 75829 states and 276163 transitions. [2021-07-09 18:04:16,060 INFO L78 Accepts]: Start accepts. Automaton has 75829 states and 276163 transitions. Word has length 25 [2021-07-09 18:04:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:16,060 INFO L482 AbstractCegarLoop]: Abstraction has 75829 states and 276163 transitions. [2021-07-09 18:04:16,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 75829 states and 276163 transitions. [2021-07-09 18:04:16,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:16,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:16,174 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:16,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:16,375 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash -484157037, now seen corresponding path program 64 times [2021-07-09 18:04:16,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:16,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034500047] [2021-07-09 18:04:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:16,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034500047] [2021-07-09 18:04:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034500047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254114220] [2021-07-09 18:04:16,402 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 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 [2021-07-09 18:04:16,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:16,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:16,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:04:16,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:16,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254114220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:16,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:16,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-07-09 18:04:16,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973397773] [2021-07-09 18:04:16,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:04:16,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:16,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:04:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:04:16,486 INFO L87 Difference]: Start difference. First operand 75829 states and 276163 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:17,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:17,271 INFO L93 Difference]: Finished difference Result 81206 states and 294898 transitions. [2021-07-09 18:04:17,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:04:17,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:04:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:17,544 INFO L225 Difference]: With dead ends: 81206 [2021-07-09 18:04:17,544 INFO L226 Difference]: Without dead ends: 81196 [2021-07-09 18:04:17,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:04:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81196 states. [2021-07-09 18:04:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81196 to 77254. [2021-07-09 18:04:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77254 states, 77253 states have (on average 3.640311703105381) internal successors, (281225), 77253 states have internal predecessors, (281225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77254 states to 77254 states and 281225 transitions. [2021-07-09 18:04:19,548 INFO L78 Accepts]: Start accepts. Automaton has 77254 states and 281225 transitions. Word has length 25 [2021-07-09 18:04:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:19,548 INFO L482 AbstractCegarLoop]: Abstraction has 77254 states and 281225 transitions. [2021-07-09 18:04:19,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77254 states and 281225 transitions. [2021-07-09 18:04:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:19,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:19,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:20,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-09 18:04:20,122 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash 697625119, now seen corresponding path program 65 times [2021-07-09 18:04:20,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:20,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860859850] [2021-07-09 18:04:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:20,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860859850] [2021-07-09 18:04:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860859850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065005556] [2021-07-09 18:04:20,198 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 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 [2021-07-09 18:04:20,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:04:20,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:20,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:20,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065005556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:20,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:20,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:04:20,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684278653] [2021-07-09 18:04:20,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:04:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:04:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:04:20,298 INFO L87 Difference]: Start difference. First operand 77254 states and 281225 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-07-09 18:04:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:21,120 INFO L93 Difference]: Finished difference Result 77680 states and 282481 transitions. [2021-07-09 18:04:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:04:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-07-09 18:04:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:21,386 INFO L225 Difference]: With dead ends: 77680 [2021-07-09 18:04:21,386 INFO L226 Difference]: Without dead ends: 77600 [2021-07-09 18:04:21,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:04:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77600 states. [2021-07-09 18:04:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77600 to 77302. [2021-07-09 18:04:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77302 states, 77301 states have (on average 3.6403280682009287) internal successors, (281401), 77301 states have internal predecessors, (281401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77302 states to 77302 states and 281401 transitions. [2021-07-09 18:04:23,516 INFO L78 Accepts]: Start accepts. Automaton has 77302 states and 281401 transitions. Word has length 25 [2021-07-09 18:04:23,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:23,516 INFO L482 AbstractCegarLoop]: Abstraction has 77302 states and 281401 transitions. [2021-07-09 18:04:23,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-07-09 18:04:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 77302 states and 281401 transitions. [2021-07-09 18:04:23,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:23,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:23,639 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:23,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-09 18:04:23,845 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash -182813941, now seen corresponding path program 66 times [2021-07-09 18:04:23,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:23,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905448365] [2021-07-09 18:04:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:23,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:23,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905448365] [2021-07-09 18:04:23,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905448365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:23,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737073999] [2021-07-09 18:04:23,905 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 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 [2021-07-09 18:04:23,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:04:23,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:23,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737073999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:23,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:23,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:04:23,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012583961] [2021-07-09 18:04:23,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:04:23,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:23,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:04:23,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:04:23,996 INFO L87 Difference]: Start difference. First operand 77302 states and 281401 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-07-09 18:04:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:24,846 INFO L93 Difference]: Finished difference Result 78459 states and 284976 transitions. [2021-07-09 18:04:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:04:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-07-09 18:04:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:25,104 INFO L225 Difference]: With dead ends: 78459 [2021-07-09 18:04:25,104 INFO L226 Difference]: Without dead ends: 78434 [2021-07-09 18:04:25,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:04:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78434 states. [2021-07-09 18:04:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78434 to 77307. [2021-07-09 18:04:26,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77307 states, 77306 states have (on average 3.640351331073914) internal successors, (281421), 77306 states have internal predecessors, (281421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77307 states to 77307 states and 281421 transitions. [2021-07-09 18:04:27,006 INFO L78 Accepts]: Start accepts. Automaton has 77307 states and 281421 transitions. Word has length 25 [2021-07-09 18:04:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:27,006 INFO L482 AbstractCegarLoop]: Abstraction has 77307 states and 281421 transitions. [2021-07-09 18:04:27,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-07-09 18:04:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 77307 states and 281421 transitions. [2021-07-09 18:04:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:27,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:27,444 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:27,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:27,657 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:27,657 INFO L82 PathProgramCache]: Analyzing trace with hash -780291045, now seen corresponding path program 67 times [2021-07-09 18:04:27,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:27,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465754407] [2021-07-09 18:04:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:27,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465754407] [2021-07-09 18:04:27,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465754407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:27,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73045872] [2021-07-09 18:04:27,729 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 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 [2021-07-09 18:04:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:27,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:27,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73045872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:27,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:27,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 18:04:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931332255] [2021-07-09 18:04:27,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:04:27,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:27,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:04:27,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:04:27,833 INFO L87 Difference]: Start difference. First operand 77307 states and 281421 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-07-09 18:04:28,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:28,589 INFO L93 Difference]: Finished difference Result 77563 states and 282160 transitions. [2021-07-09 18:04:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:04:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 [2021-07-09 18:04:28,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:28,851 INFO L225 Difference]: With dead ends: 77563 [2021-07-09 18:04:28,851 INFO L226 Difference]: Without dead ends: 77530 [2021-07-09 18:04:28,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:04:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77530 states. [2021-07-09 18:04:30,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77530 to 77315. [2021-07-09 18:04:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77315 states, 77314 states have (on average 3.640336808340016) internal successors, (281449), 77314 states have internal predecessors, (281449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77315 states to 77315 states and 281449 transitions. [2021-07-09 18:04:30,829 INFO L78 Accepts]: Start accepts. Automaton has 77315 states and 281449 transitions. Word has length 25 [2021-07-09 18:04:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:30,829 INFO L482 AbstractCegarLoop]: Abstraction has 77315 states and 281449 transitions. [2021-07-09 18:04:30,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-07-09 18:04:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 77315 states and 281449 transitions. [2021-07-09 18:04:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:30,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:30,959 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:31,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-07-09 18:04:31,159 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1817699061, now seen corresponding path program 68 times [2021-07-09 18:04:31,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:31,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215027895] [2021-07-09 18:04:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:31,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:31,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215027895] [2021-07-09 18:04:31,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215027895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:31,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979097717] [2021-07-09 18:04:31,251 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 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 [2021-07-09 18:04:31,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:31,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:31,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:31,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979097717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:31,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:31,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:04:31,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247720155] [2021-07-09 18:04:31,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:04:31,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:31,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:04:31,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:04:31,396 INFO L87 Difference]: Start difference. First operand 77315 states and 281449 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:32,245 INFO L93 Difference]: Finished difference Result 77659 states and 282390 transitions. [2021-07-09 18:04:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:04:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:04:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:32,508 INFO L225 Difference]: With dead ends: 77659 [2021-07-09 18:04:32,509 INFO L226 Difference]: Without dead ends: 77589 [2021-07-09 18:04:32,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:04:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-07-09 18:04:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77279. [2021-07-09 18:04:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 3.63971634876679) internal successors, (281270), 77278 states have internal predecessors, (281270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:34,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 281270 transitions. [2021-07-09 18:04:34,500 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 281270 transitions. Word has length 25 [2021-07-09 18:04:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:34,500 INFO L482 AbstractCegarLoop]: Abstraction has 77279 states and 281270 transitions. [2021-07-09 18:04:34,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 281270 transitions. [2021-07-09 18:04:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:34,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:34,629 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:34,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:34,829 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash -376478069, now seen corresponding path program 69 times [2021-07-09 18:04:34,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:34,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757039898] [2021-07-09 18:04:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:34,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757039898] [2021-07-09 18:04:34,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757039898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:34,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708993314] [2021-07-09 18:04:34,911 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 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 [2021-07-09 18:04:34,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:04:34,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:34,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:04:34,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:35,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708993314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:35,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:35,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:04:35,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152698243] [2021-07-09 18:04:35,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:04:35,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:04:35,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:04:35,332 INFO L87 Difference]: Start difference. First operand 77279 states and 281270 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:36,217 INFO L93 Difference]: Finished difference Result 78113 states and 283706 transitions. [2021-07-09 18:04:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:04:36,217 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 [2021-07-09 18:04:36,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:36,463 INFO L225 Difference]: With dead ends: 78113 [2021-07-09 18:04:36,463 INFO L226 Difference]: Without dead ends: 78039 [2021-07-09 18:04:36,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:04:36,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78039 states. [2021-07-09 18:04:37,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78039 to 77471. [2021-07-09 18:04:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77471 states, 77470 states have (on average 3.638763392280883) internal successors, (281895), 77470 states have internal predecessors, (281895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77471 states to 77471 states and 281895 transitions. [2021-07-09 18:04:38,499 INFO L78 Accepts]: Start accepts. Automaton has 77471 states and 281895 transitions. Word has length 25 [2021-07-09 18:04:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:38,500 INFO L482 AbstractCegarLoop]: Abstraction has 77471 states and 281895 transitions. [2021-07-09 18:04:38,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 77471 states and 281895 transitions. [2021-07-09 18:04:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:38,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:38,624 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:38,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:38,824 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:38,825 INFO L82 PathProgramCache]: Analyzing trace with hash -181794737, now seen corresponding path program 70 times [2021-07-09 18:04:38,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:38,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007973231] [2021-07-09 18:04:38,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:38,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:38,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007973231] [2021-07-09 18:04:38,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007973231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:38,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58464623] [2021-07-09 18:04:38,916 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 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 [2021-07-09 18:04:38,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:04:38,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:38,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:04:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:39,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58464623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:39,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:39,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:04:39,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674287727] [2021-07-09 18:04:39,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:04:39,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:39,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:04:39,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:04:39,050 INFO L87 Difference]: Start difference. First operand 77471 states and 281895 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:40,145 INFO L93 Difference]: Finished difference Result 77694 states and 282349 transitions. [2021-07-09 18:04:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:04:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 [2021-07-09 18:04:40,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:40,474 INFO L225 Difference]: With dead ends: 77694 [2021-07-09 18:04:40,474 INFO L226 Difference]: Without dead ends: 77515 [2021-07-09 18:04:40,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:04:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77515 states. [2021-07-09 18:04:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77515 to 77439. [2021-07-09 18:04:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77439 states, 77438 states have (on average 3.6384075001937033) internal successors, (281751), 77438 states have internal predecessors, (281751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77439 states to 77439 states and 281751 transitions. [2021-07-09 18:04:42,491 INFO L78 Accepts]: Start accepts. Automaton has 77439 states and 281751 transitions. Word has length 25 [2021-07-09 18:04:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:42,491 INFO L482 AbstractCegarLoop]: Abstraction has 77439 states and 281751 transitions. [2021-07-09 18:04:42,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 77439 states and 281751 transitions. [2021-07-09 18:04:42,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:42,615 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:42,615 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:42,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:42,816 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:42,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:42,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1465003531, now seen corresponding path program 71 times [2021-07-09 18:04:42,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:42,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224366613] [2021-07-09 18:04:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:42,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:42,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224366613] [2021-07-09 18:04:42,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224366613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:42,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409388344] [2021-07-09 18:04:42,883 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 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 [2021-07-09 18:04:42,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:04:42,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:42,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:04:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:43,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409388344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:43,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:43,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:04:43,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11814152] [2021-07-09 18:04:43,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:04:43,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:04:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:04:43,019 INFO L87 Difference]: Start difference. First operand 77439 states and 281751 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:44,114 INFO L93 Difference]: Finished difference Result 79339 states and 287695 transitions. [2021-07-09 18:04:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:04:44,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:04:44,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:44,558 INFO L225 Difference]: With dead ends: 79339 [2021-07-09 18:04:44,558 INFO L226 Difference]: Without dead ends: 79274 [2021-07-09 18:04:44,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79274 states. [2021-07-09 18:04:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79274 to 77568. [2021-07-09 18:04:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77568 states, 77567 states have (on average 3.638802583572911) internal successors, (282251), 77567 states have internal predecessors, (282251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77568 states to 77568 states and 282251 transitions. [2021-07-09 18:04:46,546 INFO L78 Accepts]: Start accepts. Automaton has 77568 states and 282251 transitions. Word has length 25 [2021-07-09 18:04:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:46,547 INFO L482 AbstractCegarLoop]: Abstraction has 77568 states and 282251 transitions. [2021-07-09 18:04:46,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77568 states and 282251 transitions. [2021-07-09 18:04:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:46,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:46,673 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:46,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:46,873 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash 53335819, now seen corresponding path program 72 times [2021-07-09 18:04:46,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:46,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553441680] [2021-07-09 18:04:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:46,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:46,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553441680] [2021-07-09 18:04:46,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553441680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:46,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576500512] [2021-07-09 18:04:46,986 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 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 [2021-07-09 18:04:47,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:04:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:04:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:47,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576500512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:47,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:47,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:04:47,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025245298] [2021-07-09 18:04:47,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:04:47,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:04:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:04:47,145 INFO L87 Difference]: Start difference. First operand 77568 states and 282251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:48,261 INFO L93 Difference]: Finished difference Result 94772 states and 343263 transitions. [2021-07-09 18:04:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:04:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:04:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:48,787 INFO L225 Difference]: With dead ends: 94772 [2021-07-09 18:04:48,787 INFO L226 Difference]: Without dead ends: 94731 [2021-07-09 18:04:48,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:04:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94731 states. [2021-07-09 18:04:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94731 to 77763. [2021-07-09 18:04:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77763 states, 77762 states have (on average 3.638486664437643) internal successors, (282936), 77762 states have internal predecessors, (282936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77763 states to 77763 states and 282936 transitions. [2021-07-09 18:04:50,996 INFO L78 Accepts]: Start accepts. Automaton has 77763 states and 282936 transitions. Word has length 25 [2021-07-09 18:04:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:50,996 INFO L482 AbstractCegarLoop]: Abstraction has 77763 states and 282936 transitions. [2021-07-09 18:04:50,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 77763 states and 282936 transitions. [2021-07-09 18:04:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:51,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:51,128 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:51,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-09 18:04:51,330 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:51,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:51,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1031893263, now seen corresponding path program 73 times [2021-07-09 18:04:51,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:51,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830375522] [2021-07-09 18:04:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:51,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:51,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830375522] [2021-07-09 18:04:51,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830375522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:51,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767455837] [2021-07-09 18:04:51,439 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 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 [2021-07-09 18:04:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:51,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:04:51,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:51,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767455837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:51,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:51,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:04:51,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141612430] [2021-07-09 18:04:51,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:04:51,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:51,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:04:51,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:04:51,586 INFO L87 Difference]: Start difference. First operand 77763 states and 282936 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:52,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:52,906 INFO L93 Difference]: Finished difference Result 94989 states and 343844 transitions. [2021-07-09 18:04:52,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:04:52,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 [2021-07-09 18:04:52,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:53,459 INFO L225 Difference]: With dead ends: 94989 [2021-07-09 18:04:53,459 INFO L226 Difference]: Without dead ends: 94948 [2021-07-09 18:04:53,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:04:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94948 states. [2021-07-09 18:04:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94948 to 77792. [2021-07-09 18:04:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77792 states, 77791 states have (on average 3.638647144271188) internal successors, (283054), 77791 states have internal predecessors, (283054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77792 states to 77792 states and 283054 transitions. [2021-07-09 18:04:55,649 INFO L78 Accepts]: Start accepts. Automaton has 77792 states and 283054 transitions. Word has length 25 [2021-07-09 18:04:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:04:55,649 INFO L482 AbstractCegarLoop]: Abstraction has 77792 states and 283054 transitions. [2021-07-09 18:04:55,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:55,649 INFO L276 IsEmpty]: Start isEmpty. Operand 77792 states and 283054 transitions. [2021-07-09 18:04:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:04:55,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:04:55,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:04:55,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:04:55,973 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:04:55,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:04:55,973 INFO L82 PathProgramCache]: Analyzing trace with hash 232853259, now seen corresponding path program 74 times [2021-07-09 18:04:55,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:04:55,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988807031] [2021-07-09 18:04:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:04:55,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:04:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:56,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:04:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988807031] [2021-07-09 18:04:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988807031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:56,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992586020] [2021-07-09 18:04:56,062 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 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 [2021-07-09 18:04:56,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:04:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:04:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:04:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:04:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:04:56,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992586020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:04:56,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:04:56,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:04:56,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461784952] [2021-07-09 18:04:56,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:04:56,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:04:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:04:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:04:56,223 INFO L87 Difference]: Start difference. First operand 77792 states and 283054 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:04:57,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:04:57,923 INFO L93 Difference]: Finished difference Result 89830 states and 327389 transitions. [2021-07-09 18:04:57,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:04:57,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:04:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:04:58,243 INFO L225 Difference]: With dead ends: 89830 [2021-07-09 18:04:58,243 INFO L226 Difference]: Without dead ends: 89585 [2021-07-09 18:04:58,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=384, Invalid=1422, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:04:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89585 states. [2021-07-09 18:05:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89585 to 77799. [2021-07-09 18:05:00,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 77798 states have (on average 3.638962441193861) internal successors, (283104), 77798 states have internal predecessors, (283104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 283104 transitions. [2021-07-09 18:05:00,420 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 283104 transitions. Word has length 25 [2021-07-09 18:05:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:00,420 INFO L482 AbstractCegarLoop]: Abstraction has 77799 states and 283104 transitions. [2021-07-09 18:05:00,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 283104 transitions. [2021-07-09 18:05:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:00,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:00,856 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:01,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:01,080 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1883882647, now seen corresponding path program 75 times [2021-07-09 18:05:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:01,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947724664] [2021-07-09 18:05:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:01,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947724664] [2021-07-09 18:05:01,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947724664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636578825] [2021-07-09 18:05:01,164 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 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 [2021-07-09 18:05:01,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:05:01,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:01,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:01,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636578825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:01,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:01,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:05:01,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007377536] [2021-07-09 18:05:01,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:05:01,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:05:01,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:05:01,323 INFO L87 Difference]: Start difference. First operand 77799 states and 283104 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:02,441 INFO L93 Difference]: Finished difference Result 94982 states and 344217 transitions. [2021-07-09 18:05:02,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:05:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:05:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:02,834 INFO L225 Difference]: With dead ends: 94982 [2021-07-09 18:05:02,835 INFO L226 Difference]: Without dead ends: 94949 [2021-07-09 18:05:02,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 297.0ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:05:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94949 states. [2021-07-09 18:05:04,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94949 to 77835. [2021-07-09 18:05:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639579104247501) internal successors, (283283), 77834 states have internal predecessors, (283283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:05,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283283 transitions. [2021-07-09 18:05:05,189 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283283 transitions. Word has length 25 [2021-07-09 18:05:05,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:05,189 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283283 transitions. [2021-07-09 18:05:05,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:05,189 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283283 transitions. [2021-07-09 18:05:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:05,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:05,639 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:05,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:05,839 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:05,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:05,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1432527205, now seen corresponding path program 76 times [2021-07-09 18:05:05,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:05,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783022770] [2021-07-09 18:05:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:05,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783022770] [2021-07-09 18:05:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783022770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:05,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153937274] [2021-07-09 18:05:05,931 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 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 [2021-07-09 18:05:05,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:05,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:06,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153937274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:06,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:06,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:05:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198541399] [2021-07-09 18:05:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:05:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:05:06,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:05:06,141 INFO L87 Difference]: Start difference. First operand 77835 states and 283283 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:07,281 INFO L93 Difference]: Finished difference Result 95030 states and 344348 transitions. [2021-07-09 18:05:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:05:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2021-07-09 18:05:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:07,658 INFO L225 Difference]: With dead ends: 95030 [2021-07-09 18:05:07,658 INFO L226 Difference]: Without dead ends: 95001 [2021-07-09 18:05:07,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 355.5ms TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:05:07,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95001 states. [2021-07-09 18:05:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95001 to 77848. [2021-07-09 18:05:09,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77848 states, 77847 states have (on average 3.6396136010379334) internal successors, (283333), 77847 states have internal predecessors, (283333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77848 states to 77848 states and 283333 transitions. [2021-07-09 18:05:10,290 INFO L78 Accepts]: Start accepts. Automaton has 77848 states and 283333 transitions. Word has length 25 [2021-07-09 18:05:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:10,290 INFO L482 AbstractCegarLoop]: Abstraction has 77848 states and 283333 transitions. [2021-07-09 18:05:10,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 77848 states and 283333 transitions. [2021-07-09 18:05:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:10,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:10,429 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:10,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:10,638 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2063400087, now seen corresponding path program 77 times [2021-07-09 18:05:10,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:10,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244934696] [2021-07-09 18:05:10,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244934696] [2021-07-09 18:05:10,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244934696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331231053] [2021-07-09 18:05:10,723 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 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 [2021-07-09 18:05:10,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:10,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:10,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:10,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331231053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:10,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:10,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:05:10,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549098735] [2021-07-09 18:05:10,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:05:10,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:05:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:05:10,909 INFO L87 Difference]: Start difference. First operand 77848 states and 283333 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:12,360 INFO L93 Difference]: Finished difference Result 88722 states and 324271 transitions. [2021-07-09 18:05:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:05:12,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-07-09 18:05:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:12,901 INFO L225 Difference]: With dead ends: 88722 [2021-07-09 18:05:12,902 INFO L226 Difference]: Without dead ends: 88697 [2021-07-09 18:05:12,903 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 18:05:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88697 states. [2021-07-09 18:05:14,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88697 to 77835. [2021-07-09 18:05:14,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639591952103194) internal successors, (283284), 77834 states have internal predecessors, (283284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:15,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283284 transitions. [2021-07-09 18:05:15,334 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283284 transitions. Word has length 25 [2021-07-09 18:05:15,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:15,334 INFO L482 AbstractCegarLoop]: Abstraction has 77835 states and 283284 transitions. [2021-07-09 18:05:15,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283284 transitions. [2021-07-09 18:05:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:15,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:15,523 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:15,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:15,740 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash 781968495, now seen corresponding path program 78 times [2021-07-09 18:05:15,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:15,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239617093] [2021-07-09 18:05:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:15,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239617093] [2021-07-09 18:05:15,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239617093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584125802] [2021-07-09 18:05:15,874 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 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 [2021-07-09 18:05:15,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:05:15,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:15,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:15,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:16,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584125802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:16,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:16,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:05:16,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882760428] [2021-07-09 18:05:16,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:05:16,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:05:16,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:05:16,080 INFO L87 Difference]: Start difference. First operand 77835 states and 283284 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:17,302 INFO L93 Difference]: Finished difference Result 94397 states and 342391 transitions. [2021-07-09 18:05:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:05:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2021-07-09 18:05:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:17,646 INFO L225 Difference]: With dead ends: 94397 [2021-07-09 18:05:17,646 INFO L226 Difference]: Without dead ends: 94360 [2021-07-09 18:05:17,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 505.5ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:05:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94360 states. [2021-07-09 18:05:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94360 to 77898. [2021-07-09 18:05:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77898 states, 77897 states have (on average 3.6398449234245223) internal successors, (283533), 77897 states have internal predecessors, (283533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77898 states to 77898 states and 283533 transitions. [2021-07-09 18:05:20,171 INFO L78 Accepts]: Start accepts. Automaton has 77898 states and 283533 transitions. Word has length 25 [2021-07-09 18:05:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:20,172 INFO L482 AbstractCegarLoop]: Abstraction has 77898 states and 283533 transitions. [2021-07-09 18:05:20,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 77898 states and 283533 transitions. [2021-07-09 18:05:20,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:20,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:20,306 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:20,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:20,507 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash -17071509, now seen corresponding path program 79 times [2021-07-09 18:05:20,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:20,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222494637] [2021-07-09 18:05:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:20,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222494637] [2021-07-09 18:05:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222494637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:20,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960617051] [2021-07-09 18:05:20,591 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 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 [2021-07-09 18:05:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:20,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960617051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:20,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:20,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:05:20,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463493854] [2021-07-09 18:05:20,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:05:20,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:20,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:05:20,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:05:20,785 INFO L87 Difference]: Start difference. First operand 77898 states and 283533 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:22,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:22,630 INFO L93 Difference]: Finished difference Result 106020 states and 385942 transitions. [2021-07-09 18:05:22,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:05:22,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-07-09 18:05:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:23,057 INFO L225 Difference]: With dead ends: 106020 [2021-07-09 18:05:23,057 INFO L226 Difference]: Without dead ends: 105968 [2021-07-09 18:05:23,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 923.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:05:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105968 states. [2021-07-09 18:05:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105968 to 77888. [2021-07-09 18:05:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.639901395611591) internal successors, (283501), 77887 states have internal predecessors, (283501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283501 transitions. [2021-07-09 18:05:25,466 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283501 transitions. Word has length 25 [2021-07-09 18:05:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:25,466 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283501 transitions. [2021-07-09 18:05:25,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283501 transitions. [2021-07-09 18:05:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:25,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:25,862 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:26,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-09 18:05:26,075 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:26,076 INFO L82 PathProgramCache]: Analyzing trace with hash -98470565, now seen corresponding path program 80 times [2021-07-09 18:05:26,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:26,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539596245] [2021-07-09 18:05:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:26,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:26,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:26,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539596245] [2021-07-09 18:05:26,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539596245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:26,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746744547] [2021-07-09 18:05:26,154 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 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 [2021-07-09 18:05:26,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:26,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:26,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746744547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:26,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:26,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:05:26,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262760289] [2021-07-09 18:05:26,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:05:26,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:05:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:05:26,348 INFO L87 Difference]: Start difference. First operand 77888 states and 283501 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:27,745 INFO L93 Difference]: Finished difference Result 96396 states and 348721 transitions. [2021-07-09 18:05:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:05:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-07-09 18:05:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:28,296 INFO L225 Difference]: With dead ends: 96396 [2021-07-09 18:05:28,296 INFO L226 Difference]: Without dead ends: 96342 [2021-07-09 18:05:28,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 585.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:05:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96342 states. [2021-07-09 18:05:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96342 to 77888. [2021-07-09 18:05:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.6401581778730727) internal successors, (283521), 77887 states have internal predecessors, (283521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283521 transitions. [2021-07-09 18:05:30,510 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283521 transitions. Word has length 25 [2021-07-09 18:05:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:30,510 INFO L482 AbstractCegarLoop]: Abstraction has 77888 states and 283521 transitions. [2021-07-09 18:05:30,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283521 transitions. [2021-07-09 18:05:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:30,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:30,644 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:30,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:30,844 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1506823447, now seen corresponding path program 81 times [2021-07-09 18:05:30,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:30,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191072281] [2021-07-09 18:05:30,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:30,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191072281] [2021-07-09 18:05:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191072281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344965861] [2021-07-09 18:05:30,912 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 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 [2021-07-09 18:05:30,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:05:30,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:05:30,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:31,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344965861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:31,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:31,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-07-09 18:05:31,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953111490] [2021-07-09 18:05:31,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:05:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:05:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:05:31,066 INFO L87 Difference]: Start difference. First operand 77888 states and 283521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:32,051 INFO L93 Difference]: Finished difference Result 85565 states and 309594 transitions. [2021-07-09 18:05:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:05:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-07-09 18:05:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:32,368 INFO L225 Difference]: With dead ends: 85565 [2021-07-09 18:05:32,369 INFO L226 Difference]: Without dead ends: 85370 [2021-07-09 18:05:32,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:05:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85370 states. [2021-07-09 18:05:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85370 to 78997. [2021-07-09 18:05:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78997 states, 78996 states have (on average 3.6391083092814824) internal successors, (287475), 78996 states have internal predecessors, (287475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78997 states to 78997 states and 287475 transitions. [2021-07-09 18:05:34,903 INFO L78 Accepts]: Start accepts. Automaton has 78997 states and 287475 transitions. Word has length 25 [2021-07-09 18:05:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:34,903 INFO L482 AbstractCegarLoop]: Abstraction has 78997 states and 287475 transitions. [2021-07-09 18:05:34,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 78997 states and 287475 transitions. [2021-07-09 18:05:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:35,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:35,048 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:35,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-09 18:05:35,248 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:35,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1345964487, now seen corresponding path program 82 times [2021-07-09 18:05:35,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:35,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761946219] [2021-07-09 18:05:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:35,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761946219] [2021-07-09 18:05:35,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761946219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210682380] [2021-07-09 18:05:35,323 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 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 [2021-07-09 18:05:35,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:05:35,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:05:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:35,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210682380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:35,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:35,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-07-09 18:05:35,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977844095] [2021-07-09 18:05:35,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:05:35,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:35,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:05:35,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:05:35,439 INFO L87 Difference]: Start difference. First operand 78997 states and 287475 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:36,288 INFO L93 Difference]: Finished difference Result 79701 states and 289399 transitions. [2021-07-09 18:05:36,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:05:36,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:05:36,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:36,587 INFO L225 Difference]: With dead ends: 79701 [2021-07-09 18:05:36,588 INFO L226 Difference]: Without dead ends: 79594 [2021-07-09 18:05:36,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:05:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2021-07-09 18:05:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 79080. [2021-07-09 18:05:38,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79080 states, 79079 states have (on average 3.634719710669078) internal successors, (287430), 79079 states have internal predecessors, (287430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79080 states to 79080 states and 287430 transitions. [2021-07-09 18:05:38,786 INFO L78 Accepts]: Start accepts. Automaton has 79080 states and 287430 transitions. Word has length 25 [2021-07-09 18:05:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:38,786 INFO L482 AbstractCegarLoop]: Abstraction has 79080 states and 287430 transitions. [2021-07-09 18:05:38,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 79080 states and 287430 transitions. [2021-07-09 18:05:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:38,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:38,937 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:39,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-09 18:05:39,138 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1425295639, now seen corresponding path program 83 times [2021-07-09 18:05:39,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:39,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885525307] [2021-07-09 18:05:39,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:39,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:39,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885525307] [2021-07-09 18:05:39,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885525307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:39,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211487544] [2021-07-09 18:05:39,199 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 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 [2021-07-09 18:05:39,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:05:39,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:39,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:05:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:39,630 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 18:05:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:39,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211487544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:39,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:39,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:05:39,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938040307] [2021-07-09 18:05:39,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:05:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:05:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:05:39,656 INFO L87 Difference]: Start difference. First operand 79080 states and 287430 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:41,203 INFO L93 Difference]: Finished difference Result 93002 states and 336576 transitions. [2021-07-09 18:05:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:05:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-07-09 18:05:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:41,569 INFO L225 Difference]: With dead ends: 93002 [2021-07-09 18:05:41,570 INFO L226 Difference]: Without dead ends: 92906 [2021-07-09 18:05:41,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 836.5ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:05:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92906 states. [2021-07-09 18:05:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92906 to 82584. [2021-07-09 18:05:43,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82584 states, 82583 states have (on average 3.6524829565406924) internal successors, (301633), 82583 states have internal predecessors, (301633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82584 states to 82584 states and 301633 transitions. [2021-07-09 18:05:44,227 INFO L78 Accepts]: Start accepts. Automaton has 82584 states and 301633 transitions. Word has length 25 [2021-07-09 18:05:44,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:44,227 INFO L482 AbstractCegarLoop]: Abstraction has 82584 states and 301633 transitions. [2021-07-09 18:05:44,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:44,227 INFO L276 IsEmpty]: Start isEmpty. Operand 82584 states and 301633 transitions. [2021-07-09 18:05:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:44,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:44,394 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:44,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-09 18:05:44,595 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash 13627927, now seen corresponding path program 84 times [2021-07-09 18:05:44,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:44,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386804680] [2021-07-09 18:05:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:44,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386804680] [2021-07-09 18:05:44,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386804680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:44,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865102318] [2021-07-09 18:05:44,693 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 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 [2021-07-09 18:05:44,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 18:05:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:44,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:44,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865102318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:44,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:44,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:05:44,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402001255] [2021-07-09 18:05:44,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:05:44,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:44,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:05:44,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:05:44,854 INFO L87 Difference]: Start difference. First operand 82584 states and 301633 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:46,141 INFO L93 Difference]: Finished difference Result 101778 states and 369627 transitions. [2021-07-09 18:05:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 18:05:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:05:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:46,927 INFO L225 Difference]: With dead ends: 101778 [2021-07-09 18:05:46,927 INFO L226 Difference]: Without dead ends: 101745 [2021-07-09 18:05:46,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:05:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101745 states. [2021-07-09 18:05:48,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101745 to 82622. [2021-07-09 18:05:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82622 states, 82621 states have (on average 3.6528485494002734) internal successors, (301802), 82621 states have internal predecessors, (301802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82622 states to 82622 states and 301802 transitions. [2021-07-09 18:05:49,647 INFO L78 Accepts]: Start accepts. Automaton has 82622 states and 301802 transitions. Word has length 25 [2021-07-09 18:05:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:49,648 INFO L482 AbstractCegarLoop]: Abstraction has 82622 states and 301802 transitions. [2021-07-09 18:05:49,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 82622 states and 301802 transitions. [2021-07-09 18:05:49,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:49,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:49,813 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:50,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:05:50,014 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:50,014 INFO L82 PathProgramCache]: Analyzing trace with hash 992185371, now seen corresponding path program 85 times [2021-07-09 18:05:50,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:50,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978448720] [2021-07-09 18:05:50,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:50,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:50,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:50,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978448720] [2021-07-09 18:05:50,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978448720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:50,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265853864] [2021-07-09 18:05:50,122 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 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 [2021-07-09 18:05:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:50,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265853864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:50,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:50,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:05:50,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340909119] [2021-07-09 18:05:50,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:05:50,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:05:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:05:50,395 INFO L87 Difference]: Start difference. First operand 82622 states and 301802 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:51,033 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2021-07-09 18:05:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:52,069 INFO L93 Difference]: Finished difference Result 103177 states and 374373 transitions. [2021-07-09 18:05:52,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:05:52,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 [2021-07-09 18:05:52,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:52,536 INFO L225 Difference]: With dead ends: 103177 [2021-07-09 18:05:52,537 INFO L226 Difference]: Without dead ends: 103066 [2021-07-09 18:05:52,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:05:52,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103066 states. [2021-07-09 18:05:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103066 to 82700. [2021-07-09 18:05:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82700 states, 82699 states have (on average 3.653224343704277) internal successors, (302118), 82699 states have internal predecessors, (302118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82700 states to 82700 states and 302118 transitions. [2021-07-09 18:05:55,129 INFO L78 Accepts]: Start accepts. Automaton has 82700 states and 302118 transitions. Word has length 25 [2021-07-09 18:05:55,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:55,129 INFO L482 AbstractCegarLoop]: Abstraction has 82700 states and 302118 transitions. [2021-07-09 18:05:55,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:55,129 INFO L276 IsEmpty]: Start isEmpty. Operand 82700 states and 302118 transitions. [2021-07-09 18:05:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:05:55,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:05:55,575 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:05:55,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-09 18:05:55,775 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:05:55,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:05:55,776 INFO L82 PathProgramCache]: Analyzing trace with hash 193145367, now seen corresponding path program 86 times [2021-07-09 18:05:55,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:05:55,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544075947] [2021-07-09 18:05:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:05:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:05:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:55,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:05:55,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544075947] [2021-07-09 18:05:55,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544075947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:55,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598348783] [2021-07-09 18:05:55,865 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 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 [2021-07-09 18:05:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:05:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:05:55,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:05:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:05:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:05:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598348783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:05:56,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:05:56,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:05:56,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154735026] [2021-07-09 18:05:56,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:05:56,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:05:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:05:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:05:56,024 INFO L87 Difference]: Start difference. First operand 82700 states and 302118 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:05:57,177 INFO L93 Difference]: Finished difference Result 96794 states and 354161 transitions. [2021-07-09 18:05:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:05:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:05:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:05:57,538 INFO L225 Difference]: With dead ends: 96794 [2021-07-09 18:05:57,538 INFO L226 Difference]: Without dead ends: 96755 [2021-07-09 18:05:57,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:05:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96755 states. [2021-07-09 18:05:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96755 to 82707. [2021-07-09 18:05:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82707 states, 82706 states have (on average 3.6533987860614707) internal successors, (302158), 82706 states have internal predecessors, (302158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82707 states to 82707 states and 302158 transitions. [2021-07-09 18:05:59,967 INFO L78 Accepts]: Start accepts. Automaton has 82707 states and 302158 transitions. Word has length 25 [2021-07-09 18:05:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:05:59,967 INFO L482 AbstractCegarLoop]: Abstraction has 82707 states and 302158 transitions. [2021-07-09 18:05:59,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:05:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 82707 states and 302158 transitions. [2021-07-09 18:06:00,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:00,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:00,106 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:00,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-09 18:06:00,306 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:00,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1088286225, now seen corresponding path program 87 times [2021-07-09 18:06:00,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:00,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478390531] [2021-07-09 18:06:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:00,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478390531] [2021-07-09 18:06:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478390531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807621768] [2021-07-09 18:06:00,412 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 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 [2021-07-09 18:06:00,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:06:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:00,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:00,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807621768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:00,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:00,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:06:00,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719932026] [2021-07-09 18:06:00,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:00,572 INFO L87 Difference]: Start difference. First operand 82707 states and 302158 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:02,115 INFO L93 Difference]: Finished difference Result 101984 states and 370229 transitions. [2021-07-09 18:06:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:06:02,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 [2021-07-09 18:06:02,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:02,491 INFO L225 Difference]: With dead ends: 101984 [2021-07-09 18:06:02,492 INFO L226 Difference]: Without dead ends: 101951 [2021-07-09 18:06:02,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:06:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101951 states. [2021-07-09 18:06:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101951 to 82749. [2021-07-09 18:06:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82749 states, 82748 states have (on average 3.6533209261855273) internal successors, (302305), 82748 states have internal predecessors, (302305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82749 states to 82749 states and 302305 transitions. [2021-07-09 18:06:04,812 INFO L78 Accepts]: Start accepts. Automaton has 82749 states and 302305 transitions. Word has length 25 [2021-07-09 18:06:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:04,813 INFO L482 AbstractCegarLoop]: Abstraction has 82749 states and 302305 transitions. [2021-07-09 18:06:04,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:04,813 INFO L276 IsEmpty]: Start isEmpty. Operand 82749 states and 302305 transitions. [2021-07-09 18:06:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:05,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:05,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:05,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:05,452 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:05,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1887326229, now seen corresponding path program 88 times [2021-07-09 18:06:05,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:05,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050730980] [2021-07-09 18:06:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:05,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050730980] [2021-07-09 18:06:05,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050730980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207423421] [2021-07-09 18:06:05,553 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 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 [2021-07-09 18:06:05,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:05,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:05,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:05,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207423421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:05,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:05,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:06:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986607127] [2021-07-09 18:06:05,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:05,718 INFO L87 Difference]: Start difference. First operand 82749 states and 302305 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:07,059 INFO L93 Difference]: Finished difference Result 115207 states and 419837 transitions. [2021-07-09 18:06:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:06:07,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:06:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:07,732 INFO L225 Difference]: With dead ends: 115207 [2021-07-09 18:06:07,733 INFO L226 Difference]: Without dead ends: 115157 [2021-07-09 18:06:07,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:06:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115157 states. [2021-07-09 18:06:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115157 to 82759. [2021-07-09 18:06:09,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82759 states, 82758 states have (on average 3.653821986998236) internal successors, (302383), 82758 states have internal predecessors, (302383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82759 states to 82759 states and 302383 transitions. [2021-07-09 18:06:10,174 INFO L78 Accepts]: Start accepts. Automaton has 82759 states and 302383 transitions. Word has length 25 [2021-07-09 18:06:10,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:10,174 INFO L482 AbstractCegarLoop]: Abstraction has 82759 states and 302383 transitions. [2021-07-09 18:06:10,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 82759 states and 302383 transitions. [2021-07-09 18:06:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:10,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:10,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:10,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-09 18:06:10,848 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:10,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:10,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1968725285, now seen corresponding path program 89 times [2021-07-09 18:06:10,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:10,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118421640] [2021-07-09 18:06:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:10,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:10,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118421640] [2021-07-09 18:06:10,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118421640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:10,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972581783] [2021-07-09 18:06:10,916 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 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 [2021-07-09 18:06:10,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:11,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972581783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:11,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:11,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:06:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998333396] [2021-07-09 18:06:11,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:11,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:11,081 INFO L87 Difference]: Start difference. First operand 82759 states and 302383 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:12,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:12,296 INFO L93 Difference]: Finished difference Result 101895 states and 369939 transitions. [2021-07-09 18:06:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:06:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:06:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:12,684 INFO L225 Difference]: With dead ends: 101895 [2021-07-09 18:06:12,684 INFO L226 Difference]: Without dead ends: 101841 [2021-07-09 18:06:12,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101841 states. [2021-07-09 18:06:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101841 to 82803. [2021-07-09 18:06:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82803 states, 82802 states have (on average 3.6542112509359677) internal successors, (302576), 82802 states have internal predecessors, (302576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82803 states to 82803 states and 302576 transitions. [2021-07-09 18:06:15,192 INFO L78 Accepts]: Start accepts. Automaton has 82803 states and 302576 transitions. Word has length 25 [2021-07-09 18:06:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:15,192 INFO L482 AbstractCegarLoop]: Abstraction has 82803 states and 302576 transitions. [2021-07-09 18:06:15,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 82803 states and 302576 transitions. [2021-07-09 18:06:15,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:15,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:15,328 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:15,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-07-09 18:06:15,528 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash 118188467, now seen corresponding path program 90 times [2021-07-09 18:06:15,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:15,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037104177] [2021-07-09 18:06:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037104177] [2021-07-09 18:06:15,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037104177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184737295] [2021-07-09 18:06:15,618 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 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 [2021-07-09 18:06:15,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:15,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:15,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:15,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184737295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:15,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:15,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:06:15,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095683280] [2021-07-09 18:06:15,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:15,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:15,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:15,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:15,796 INFO L87 Difference]: Start difference. First operand 82803 states and 302576 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:17,289 INFO L93 Difference]: Finished difference Result 100879 states and 366869 transitions. [2021-07-09 18:06:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:06:17,290 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 [2021-07-09 18:06:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:17,656 INFO L225 Difference]: With dead ends: 100879 [2021-07-09 18:06:17,656 INFO L226 Difference]: Without dead ends: 100846 [2021-07-09 18:06:17,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:06:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100846 states. [2021-07-09 18:06:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100846 to 82884. [2021-07-09 18:06:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82884 states, 82883 states have (on average 3.6542958145820013) internal successors, (302879), 82883 states have internal predecessors, (302879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82884 states to 82884 states and 302879 transitions. [2021-07-09 18:06:20,017 INFO L78 Accepts]: Start accepts. Automaton has 82884 states and 302879 transitions. Word has length 25 [2021-07-09 18:06:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:20,017 INFO L482 AbstractCegarLoop]: Abstraction has 82884 states and 302879 transitions. [2021-07-09 18:06:20,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 82884 states and 302879 transitions. [2021-07-09 18:06:20,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:20,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:20,567 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:20,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:20,769 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:20,769 INFO L82 PathProgramCache]: Analyzing trace with hash -680851537, now seen corresponding path program 91 times [2021-07-09 18:06:20,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:20,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883198476] [2021-07-09 18:06:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:20,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:20,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883198476] [2021-07-09 18:06:20,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883198476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:20,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951375047] [2021-07-09 18:06:20,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:06:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:20,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:20,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951375047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:21,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:21,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:06:21,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87235114] [2021-07-09 18:06:21,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:21,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:21,097 INFO L87 Difference]: Start difference. First operand 82884 states and 302879 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:22,489 INFO L93 Difference]: Finished difference Result 114377 states and 417122 transitions. [2021-07-09 18:06:22,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:06:22,490 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:06:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:22,952 INFO L225 Difference]: With dead ends: 114377 [2021-07-09 18:06:22,952 INFO L226 Difference]: Without dead ends: 114327 [2021-07-09 18:06:22,953 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:06:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114327 states. [2021-07-09 18:06:25,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114327 to 82862. [2021-07-09 18:06:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82862 states, 82861 states have (on average 3.6543609176814185) internal successors, (302804), 82861 states have internal predecessors, (302804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82862 states to 82862 states and 302804 transitions. [2021-07-09 18:06:25,563 INFO L78 Accepts]: Start accepts. Automaton has 82862 states and 302804 transitions. Word has length 25 [2021-07-09 18:06:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:25,563 INFO L482 AbstractCegarLoop]: Abstraction has 82862 states and 302804 transitions. [2021-07-09 18:06:25,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:25,563 INFO L276 IsEmpty]: Start isEmpty. Operand 82862 states and 302804 transitions. [2021-07-09 18:06:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:25,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:25,694 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:25,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-07-09 18:06:25,895 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:25,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:25,895 INFO L82 PathProgramCache]: Analyzing trace with hash -762250593, now seen corresponding path program 92 times [2021-07-09 18:06:25,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:25,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936365780] [2021-07-09 18:06:25,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:25,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936365780] [2021-07-09 18:06:25,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936365780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:25,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890616810] [2021-07-09 18:06:25,971 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:06:26,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:26,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:26,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:26,337 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-07-09 18:06:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890616810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:26,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:26,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:06:26,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184734647] [2021-07-09 18:06:26,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:26,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:26,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:26,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:26,494 INFO L87 Difference]: Start difference. First operand 82862 states and 302804 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:27,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:27,601 INFO L93 Difference]: Finished difference Result 104310 states and 378454 transitions. [2021-07-09 18:06:27,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:06:27,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:06:27,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:27,981 INFO L225 Difference]: With dead ends: 104310 [2021-07-09 18:06:27,981 INFO L226 Difference]: Without dead ends: 104256 [2021-07-09 18:06:27,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 724.7ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:06:28,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104256 states. [2021-07-09 18:06:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104256 to 82924. [2021-07-09 18:06:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82924 states, 82923 states have (on average 3.6555599773283647) internal successors, (303130), 82923 states have internal predecessors, (303130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82924 states to 82924 states and 303130 transitions. [2021-07-09 18:06:30,519 INFO L78 Accepts]: Start accepts. Automaton has 82924 states and 303130 transitions. Word has length 25 [2021-07-09 18:06:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:30,519 INFO L482 AbstractCegarLoop]: Abstraction has 82924 states and 303130 transitions. [2021-07-09 18:06:30,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 82924 states and 303130 transitions. [2021-07-09 18:06:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:30,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:30,664 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:30,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-09 18:06:30,865 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:30,865 INFO L82 PathProgramCache]: Analyzing trace with hash -348634661, now seen corresponding path program 93 times [2021-07-09 18:06:30,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:30,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061213715] [2021-07-09 18:06:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:30,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:30,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061213715] [2021-07-09 18:06:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061213715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:30,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175946968] [2021-07-09 18:06:30,931 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 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 [2021-07-09 18:06:30,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:06:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:30,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:30,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175946968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:31,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:31,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-09 18:06:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705385718] [2021-07-09 18:06:31,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:06:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:06:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:31,100 INFO L87 Difference]: Start difference. First operand 82924 states and 303130 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:32,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:32,757 INFO L93 Difference]: Finished difference Result 104844 states and 380478 transitions. [2021-07-09 18:06:32,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:06:32,757 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-07-09 18:06:32,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:33,162 INFO L225 Difference]: With dead ends: 104844 [2021-07-09 18:06:33,162 INFO L226 Difference]: Without dead ends: 104794 [2021-07-09 18:06:33,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:06:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104794 states. [2021-07-09 18:06:35,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104794 to 82938. [2021-07-09 18:06:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82938 states, 82937 states have (on average 3.656293331082629) internal successors, (303242), 82937 states have internal predecessors, (303242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82938 states to 82938 states and 303242 transitions. [2021-07-09 18:06:35,578 INFO L78 Accepts]: Start accepts. Automaton has 82938 states and 303242 transitions. Word has length 25 [2021-07-09 18:06:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:35,578 INFO L482 AbstractCegarLoop]: Abstraction has 82938 states and 303242 transitions. [2021-07-09 18:06:35,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 82938 states and 303242 transitions. [2021-07-09 18:06:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:36,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:36,033 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:36,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:36,233 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:36,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:36,234 INFO L82 PathProgramCache]: Analyzing trace with hash -540119201, now seen corresponding path program 94 times [2021-07-09 18:06:36,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:36,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727825580] [2021-07-09 18:06:36,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:36,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:36,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727825580] [2021-07-09 18:06:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727825580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:36,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503396962] [2021-07-09 18:06:36,291 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 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 [2021-07-09 18:06:36,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:06:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:36,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:06:36,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:36,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503396962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:36,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:36,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-09 18:06:36,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752603679] [2021-07-09 18:06:36,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:06:36,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:36,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:06:36,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:06:36,442 INFO L87 Difference]: Start difference. First operand 82938 states and 303242 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:37,342 INFO L93 Difference]: Finished difference Result 83638 states and 305189 transitions. [2021-07-09 18:06:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:06:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:06:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:37,654 INFO L225 Difference]: With dead ends: 83638 [2021-07-09 18:06:37,654 INFO L226 Difference]: Without dead ends: 83581 [2021-07-09 18:06:37,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:06:37,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83581 states. [2021-07-09 18:06:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83581 to 83002. [2021-07-09 18:06:39,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83002 states, 83001 states have (on average 3.6559680003855375) internal successors, (303449), 83001 states have internal predecessors, (303449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83002 states to 83002 states and 303449 transitions. [2021-07-09 18:06:39,787 INFO L78 Accepts]: Start accepts. Automaton has 83002 states and 303449 transitions. Word has length 25 [2021-07-09 18:06:39,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:39,787 INFO L482 AbstractCegarLoop]: Abstraction has 83002 states and 303449 transitions. [2021-07-09 18:06:39,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 83002 states and 303449 transitions. [2021-07-09 18:06:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:39,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:39,921 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:40,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 18:06:40,121 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1951786913, now seen corresponding path program 95 times [2021-07-09 18:06:40,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:40,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637348081] [2021-07-09 18:06:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:40,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:40,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637348081] [2021-07-09 18:06:40,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637348081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:40,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199057823] [2021-07-09 18:06:40,539 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 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 [2021-07-09 18:06:40,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:06:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:40,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199057823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:40,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:40,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:06:40,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407685033] [2021-07-09 18:06:40,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:06:40,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:06:40,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:40,699 INFO L87 Difference]: Start difference. First operand 83002 states and 303449 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:41,628 INFO L93 Difference]: Finished difference Result 101871 states and 370301 transitions. [2021-07-09 18:06:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:06:41,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:06:41,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:42,004 INFO L225 Difference]: With dead ends: 101871 [2021-07-09 18:06:42,004 INFO L226 Difference]: Without dead ends: 101820 [2021-07-09 18:06:42,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:06:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101820 states. [2021-07-09 18:06:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101820 to 83375. [2021-07-09 18:06:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6553122076426705) internal successors, (304758), 83374 states have internal predecessors, (304758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:44,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304758 transitions. [2021-07-09 18:06:44,580 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304758 transitions. Word has length 25 [2021-07-09 18:06:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:44,580 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304758 transitions. [2021-07-09 18:06:44,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304758 transitions. [2021-07-09 18:06:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:44,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:44,725 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:44,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-07-09 18:06:44,926 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:44,926 INFO L82 PathProgramCache]: Analyzing trace with hash -973229469, now seen corresponding path program 96 times [2021-07-09 18:06:44,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:44,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414983316] [2021-07-09 18:06:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:45,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:45,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414983316] [2021-07-09 18:06:45,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414983316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:45,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407620590] [2021-07-09 18:06:45,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:06:45,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:06:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:45,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:45,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407620590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:06:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537027099] [2021-07-09 18:06:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:06:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:06:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:06:45,192 INFO L87 Difference]: Start difference. First operand 83375 states and 304758 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:46,298 INFO L93 Difference]: Finished difference Result 118493 states and 424280 transitions. [2021-07-09 18:06:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:06:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 [2021-07-09 18:06:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:46,940 INFO L225 Difference]: With dead ends: 118493 [2021-07-09 18:06:46,940 INFO L226 Difference]: Without dead ends: 118321 [2021-07-09 18:06:46,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:06:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118321 states. [2021-07-09 18:06:48,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118321 to 83375. [2021-07-09 18:06:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83375 states, 83374 states have (on average 3.6537769568450598) internal successors, (304630), 83374 states have internal predecessors, (304630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83375 states to 83375 states and 304630 transitions. [2021-07-09 18:06:49,362 INFO L78 Accepts]: Start accepts. Automaton has 83375 states and 304630 transitions. Word has length 25 [2021-07-09 18:06:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:49,362 INFO L482 AbstractCegarLoop]: Abstraction has 83375 states and 304630 transitions. [2021-07-09 18:06:49,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:49,362 INFO L276 IsEmpty]: Start isEmpty. Operand 83375 states and 304630 transitions. [2021-07-09 18:06:49,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:49,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:49,932 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:50,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:50,149 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:50,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269473, now seen corresponding path program 97 times [2021-07-09 18:06:50,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:50,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123680214] [2021-07-09 18:06:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:50,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123680214] [2021-07-09 18:06:50,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123680214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809379871] [2021-07-09 18:06:50,247 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:06:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:06:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:06:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:50,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809379871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:50,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:50,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:06:50,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261942262] [2021-07-09 18:06:50,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:06:50,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:50,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:06:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:06:50,464 INFO L87 Difference]: Start difference. First operand 83375 states and 304630 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:52,071 INFO L93 Difference]: Finished difference Result 107765 states and 385439 transitions. [2021-07-09 18:06:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:06:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-07-09 18:06:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:52,692 INFO L225 Difference]: With dead ends: 107765 [2021-07-09 18:06:52,693 INFO L226 Difference]: Without dead ends: 107423 [2021-07-09 18:06:52,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=428, Invalid=1294, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:06:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107423 states. [2021-07-09 18:06:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107423 to 83439. [2021-07-09 18:06:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83439 states, 83438 states have (on average 3.6545938301493326) internal successors, (304932), 83438 states have internal predecessors, (304932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83439 states to 83439 states and 304932 transitions. [2021-07-09 18:06:55,001 INFO L78 Accepts]: Start accepts. Automaton has 83439 states and 304932 transitions. Word has length 25 [2021-07-09 18:06:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:55,001 INFO L482 AbstractCegarLoop]: Abstraction has 83439 states and 304932 transitions. [2021-07-09 18:06:55,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:55,001 INFO L276 IsEmpty]: Start isEmpty. Operand 83439 states and 304932 transitions. [2021-07-09 18:06:55,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:55,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:55,135 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:55,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-07-09 18:06:55,349 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:55,349 INFO L82 PathProgramCache]: Analyzing trace with hash -305853537, now seen corresponding path program 98 times [2021-07-09 18:06:55,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:55,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839553271] [2021-07-09 18:06:55,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:55,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839553271] [2021-07-09 18:06:55,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839553271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:55,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468938727] [2021-07-09 18:06:55,405 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 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 [2021-07-09 18:06:55,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:06:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:06:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:55,792 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-09 18:06:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468938727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:55,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:55,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:06:55,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977268473] [2021-07-09 18:06:55,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:06:55,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:55,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:06:55,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:06:55,808 INFO L87 Difference]: Start difference. First operand 83439 states and 304932 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:06:56,384 INFO L93 Difference]: Finished difference Result 85157 states and 310455 transitions. [2021-07-09 18:06:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:06:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 25 [2021-07-09 18:06:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:06:56,867 INFO L225 Difference]: With dead ends: 85157 [2021-07-09 18:06:56,867 INFO L226 Difference]: Without dead ends: 85092 [2021-07-09 18:06:56,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85092 states. [2021-07-09 18:06:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85092 to 84734. [2021-07-09 18:06:58,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84734 states, 84733 states have (on average 3.650643786954315) internal successors, (309330), 84733 states have internal predecessors, (309330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:59,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84734 states to 84734 states and 309330 transitions. [2021-07-09 18:06:59,045 INFO L78 Accepts]: Start accepts. Automaton has 84734 states and 309330 transitions. Word has length 25 [2021-07-09 18:06:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:06:59,045 INFO L482 AbstractCegarLoop]: Abstraction has 84734 states and 309330 transitions. [2021-07-09 18:06:59,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:06:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 84734 states and 309330 transitions. [2021-07-09 18:06:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:06:59,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:06:59,185 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:06:59,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-07-09 18:06:59,385 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:06:59,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:06:59,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1461906909, now seen corresponding path program 99 times [2021-07-09 18:06:59,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:06:59,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089438750] [2021-07-09 18:06:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:06:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:06:59,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:59,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:06:59,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089438750] [2021-07-09 18:06:59,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089438750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:59,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933421667] [2021-07-09 18:06:59,453 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 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 [2021-07-09 18:06:59,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:06:59,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:06:59,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:06:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:06:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:06:59,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933421667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:06:59,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:06:59,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-07-09 18:06:59,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269103655] [2021-07-09 18:06:59,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:06:59,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:06:59,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:06:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:06:59,610 INFO L87 Difference]: Start difference. First operand 84734 states and 309330 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:00,713 INFO L93 Difference]: Finished difference Result 87116 states and 316831 transitions. [2021-07-09 18:07:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 18:07:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 [2021-07-09 18:07:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:01,193 INFO L225 Difference]: With dead ends: 87116 [2021-07-09 18:07:01,193 INFO L226 Difference]: Without dead ends: 86937 [2021-07-09 18:07:01,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:07:01,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86937 states. [2021-07-09 18:07:02,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86937 to 84105. [2021-07-09 18:07:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84105 states, 84104 states have (on average 3.6505279178160372) internal successors, (307024), 84104 states have internal predecessors, (307024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84105 states to 84105 states and 307024 transitions. [2021-07-09 18:07:03,375 INFO L78 Accepts]: Start accepts. Automaton has 84105 states and 307024 transitions. Word has length 25 [2021-07-09 18:07:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:03,375 INFO L482 AbstractCegarLoop]: Abstraction has 84105 states and 307024 transitions. [2021-07-09 18:07:03,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 84105 states and 307024 transitions. [2021-07-09 18:07:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:03,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:03,525 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:03,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:03,726 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:03,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:03,726 INFO L82 PathProgramCache]: Analyzing trace with hash -426128515, now seen corresponding path program 100 times [2021-07-09 18:07:03,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:03,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545625820] [2021-07-09 18:07:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:03,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545625820] [2021-07-09 18:07:03,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545625820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:03,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350397456] [2021-07-09 18:07:03,801 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 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 [2021-07-09 18:07:03,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 18:07:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:04,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350397456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:04,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:04,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:07:04,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494000241] [2021-07-09 18:07:04,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:07:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:04,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:07:04,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:07:04,196 INFO L87 Difference]: Start difference. First operand 84105 states and 307024 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:04,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:04,835 INFO L93 Difference]: Finished difference Result 84705 states and 308613 transitions. [2021-07-09 18:07:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:07:04,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 25 [2021-07-09 18:07:04,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:05,312 INFO L225 Difference]: With dead ends: 84705 [2021-07-09 18:07:05,312 INFO L226 Difference]: Without dead ends: 84664 [2021-07-09 18:07:05,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:07:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84664 states. [2021-07-09 18:07:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84664 to 84321. [2021-07-09 18:07:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84321 states, 84320 states have (on average 3.6487073055028465) internal successors, (307659), 84320 states have internal predecessors, (307659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84321 states to 84321 states and 307659 transitions. [2021-07-09 18:07:07,548 INFO L78 Accepts]: Start accepts. Automaton has 84321 states and 307659 transitions. Word has length 25 [2021-07-09 18:07:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:07,548 INFO L482 AbstractCegarLoop]: Abstraction has 84321 states and 307659 transitions. [2021-07-09 18:07:07,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 84321 states and 307659 transitions. [2021-07-09 18:07:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:07,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:07,703 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:07,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:07,903 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:07,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:07,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1484388057, now seen corresponding path program 101 times [2021-07-09 18:07:07,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:07,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981113097] [2021-07-09 18:07:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:07,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:07,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981113097] [2021-07-09 18:07:07,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981113097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:07,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591335688] [2021-07-09 18:07:07,997 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 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 [2021-07-09 18:07:08,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:07:08,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:08,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:08,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:08,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591335688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:08,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:08,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:07:08,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950772482] [2021-07-09 18:07:08,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:07:08,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:07:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:07:08,124 INFO L87 Difference]: Start difference. First operand 84321 states and 307659 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:08,559 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-07-09 18:07:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:09,030 INFO L93 Difference]: Finished difference Result 84472 states and 308027 transitions. [2021-07-09 18:07:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:07:09,030 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 25 [2021-07-09 18:07:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:09,498 INFO L225 Difference]: With dead ends: 84472 [2021-07-09 18:07:09,498 INFO L226 Difference]: Without dead ends: 84409 [2021-07-09 18:07:09,498 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:07:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84409 states. [2021-07-09 18:07:10,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84409 to 84320. [2021-07-09 18:07:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84320 states, 84319 states have (on average 3.6487031392687297) internal successors, (307655), 84319 states have internal predecessors, (307655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84320 states to 84320 states and 307655 transitions. [2021-07-09 18:07:11,596 INFO L78 Accepts]: Start accepts. Automaton has 84320 states and 307655 transitions. Word has length 25 [2021-07-09 18:07:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:11,596 INFO L482 AbstractCegarLoop]: Abstraction has 84320 states and 307655 transitions. [2021-07-09 18:07:11,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 84320 states and 307655 transitions. [2021-07-09 18:07:11,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:11,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:11,743 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:11,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:11,944 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:11,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:11,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1814796211, now seen corresponding path program 102 times [2021-07-09 18:07:11,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:11,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422250162] [2021-07-09 18:07:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:12,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422250162] [2021-07-09 18:07:12,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422250162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851068063] [2021-07-09 18:07:12,028 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 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 [2021-07-09 18:07:12,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:07:12,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:12,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:12,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:12,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851068063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:12,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:12,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-09 18:07:12,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531298797] [2021-07-09 18:07:12,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:07:12,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:07:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:07:12,178 INFO L87 Difference]: Start difference. First operand 84320 states and 307655 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:13,256 INFO L93 Difference]: Finished difference Result 102467 states and 372249 transitions. [2021-07-09 18:07:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:07:13,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 [2021-07-09 18:07:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:13,858 INFO L225 Difference]: With dead ends: 102467 [2021-07-09 18:07:13,858 INFO L226 Difference]: Without dead ends: 102393 [2021-07-09 18:07:13,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:07:13,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102393 states. [2021-07-09 18:07:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102393 to 84329. [2021-07-09 18:07:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84329 states, 84328 states have (on average 3.648728773361161) internal successors, (307690), 84328 states have internal predecessors, (307690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84329 states to 84329 states and 307690 transitions. [2021-07-09 18:07:16,118 INFO L78 Accepts]: Start accepts. Automaton has 84329 states and 307690 transitions. Word has length 25 [2021-07-09 18:07:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:16,118 INFO L482 AbstractCegarLoop]: Abstraction has 84329 states and 307690 transitions. [2021-07-09 18:07:16,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 84329 states and 307690 transitions. [2021-07-09 18:07:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:16,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:16,251 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:16,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:16,452 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:16,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:16,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1015756207, now seen corresponding path program 103 times [2021-07-09 18:07:16,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:16,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436622850] [2021-07-09 18:07:16,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:16,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436622850] [2021-07-09 18:07:16,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436622850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:16,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357473949] [2021-07-09 18:07:16,873 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 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 [2021-07-09 18:07:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:16,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:16,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:17,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357473949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:17,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:17,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-09 18:07:17,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447702794] [2021-07-09 18:07:17,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:07:17,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:07:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:07:17,032 INFO L87 Difference]: Start difference. First operand 84329 states and 307690 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:18,301 INFO L93 Difference]: Finished difference Result 114923 states and 419277 transitions. [2021-07-09 18:07:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 18:07:18,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-07-09 18:07:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:19,095 INFO L225 Difference]: With dead ends: 114923 [2021-07-09 18:07:19,095 INFO L226 Difference]: Without dead ends: 114877 [2021-07-09 18:07:19,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:07:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114877 states. [2021-07-09 18:07:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114877 to 84322. [2021-07-09 18:07:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84322 states, 84321 states have (on average 3.6487233310800393) internal successors, (307664), 84321 states have internal predecessors, (307664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84322 states to 84322 states and 307664 transitions. [2021-07-09 18:07:21,809 INFO L78 Accepts]: Start accepts. Automaton has 84322 states and 307664 transitions. Word has length 25 [2021-07-09 18:07:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:21,809 INFO L482 AbstractCegarLoop]: Abstraction has 84322 states and 307664 transitions. [2021-07-09 18:07:21,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 84322 states and 307664 transitions. [2021-07-09 18:07:21,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:21,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:21,969 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:22,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-09 18:07:22,170 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:22,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash 777388195, now seen corresponding path program 104 times [2021-07-09 18:07:22,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:22,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636268508] [2021-07-09 18:07:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:22,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636268508] [2021-07-09 18:07:22,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636268508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:22,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103135264] [2021-07-09 18:07:22,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:07:22,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:22,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:22,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:22,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:22,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103135264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:22,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:22,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 18:07:22,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575728630] [2021-07-09 18:07:22,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:07:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:22,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:07:22,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:07:22,407 INFO L87 Difference]: Start difference. First operand 84322 states and 307664 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:23,340 INFO L93 Difference]: Finished difference Result 84652 states and 308467 transitions. [2021-07-09 18:07:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:07:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 25 [2021-07-09 18:07:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:23,645 INFO L225 Difference]: With dead ends: 84652 [2021-07-09 18:07:23,646 INFO L226 Difference]: Without dead ends: 84561 [2021-07-09 18:07:23,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:07:23,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84561 states. [2021-07-09 18:07:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84561 to 84306. [2021-07-09 18:07:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84306 states, 84305 states have (on average 3.647316292034873) internal successors, (307487), 84305 states have internal predecessors, (307487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84306 states to 84306 states and 307487 transitions. [2021-07-09 18:07:25,981 INFO L78 Accepts]: Start accepts. Automaton has 84306 states and 307487 transitions. Word has length 25 [2021-07-09 18:07:25,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:25,981 INFO L482 AbstractCegarLoop]: Abstraction has 84306 states and 307487 transitions. [2021-07-09 18:07:25,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 84306 states and 307487 transitions. [2021-07-09 18:07:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:26,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:26,139 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:26,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:26,340 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:26,340 INFO L82 PathProgramCache]: Analyzing trace with hash 664777499, now seen corresponding path program 105 times [2021-07-09 18:07:26,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:26,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924654732] [2021-07-09 18:07:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:26,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924654732] [2021-07-09 18:07:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924654732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:26,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897083673] [2021-07-09 18:07:26,432 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 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 [2021-07-09 18:07:26,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:07:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:26,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897083673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:26,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:26,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-07-09 18:07:26,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512773385] [2021-07-09 18:07:26,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:07:26,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:26,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:07:26,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:07:26,556 INFO L87 Difference]: Start difference. First operand 84306 states and 307487 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:27,564 INFO L93 Difference]: Finished difference Result 103449 states and 375574 transitions. [2021-07-09 18:07:27,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:07:27,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 25 [2021-07-09 18:07:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:28,144 INFO L225 Difference]: With dead ends: 103449 [2021-07-09 18:07:28,144 INFO L226 Difference]: Without dead ends: 103317 [2021-07-09 18:07:28,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:07:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103317 states. [2021-07-09 18:07:30,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103317 to 85017. [2021-07-09 18:07:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85017 states, 85016 states have (on average 3.644808036134375) internal successors, (309867), 85016 states have internal predecessors, (309867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85017 states to 85017 states and 309867 transitions. [2021-07-09 18:07:30,486 INFO L78 Accepts]: Start accepts. Automaton has 85017 states and 309867 transitions. Word has length 25 [2021-07-09 18:07:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:30,486 INFO L482 AbstractCegarLoop]: Abstraction has 85017 states and 309867 transitions. [2021-07-09 18:07:30,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 85017 states and 309867 transitions. [2021-07-09 18:07:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:30,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:30,628 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:30,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:30,829 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash -134262505, now seen corresponding path program 106 times [2021-07-09 18:07:30,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:30,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680342113] [2021-07-09 18:07:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:30,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680342113] [2021-07-09 18:07:30,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680342113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452278592] [2021-07-09 18:07:30,917 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 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 [2021-07-09 18:07:30,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:07:30,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:30,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452278592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:31,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:31,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-07-09 18:07:31,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917915431] [2021-07-09 18:07:31,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:07:31,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:31,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:07:31,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:07:31,340 INFO L87 Difference]: Start difference. First operand 85017 states and 309867 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) [2021-07-09 18:07:32,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:32,426 INFO L93 Difference]: Finished difference Result 116231 states and 423805 transitions. [2021-07-09 18:07:32,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:07:32,426 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 25 [2021-07-09 18:07:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:32,880 INFO L225 Difference]: With dead ends: 116231 [2021-07-09 18:07:32,880 INFO L226 Difference]: Without dead ends: 116185 [2021-07-09 18:07:32,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 314.6ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:07:33,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116185 states. [2021-07-09 18:07:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116185 to 85004. [2021-07-09 18:07:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85004 states, 85003 states have (on average 3.644706657412091) internal successors, (309811), 85003 states have internal predecessors, (309811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85004 states to 85004 states and 309811 transitions. [2021-07-09 18:07:35,607 INFO L78 Accepts]: Start accepts. Automaton has 85004 states and 309811 transitions. Word has length 25 [2021-07-09 18:07:35,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:35,607 INFO L482 AbstractCegarLoop]: Abstraction has 85004 states and 309811 transitions. [2021-07-09 18:07:35,607 INFO L483 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) [2021-07-09 18:07:35,607 INFO L276 IsEmpty]: Start isEmpty. Operand 85004 states and 309811 transitions. [2021-07-09 18:07:35,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:35,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:35,754 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:35,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-07-09 18:07:35,954 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash -394386371, now seen corresponding path program 107 times [2021-07-09 18:07:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:35,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609914062] [2021-07-09 18:07:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:36,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:36,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609914062] [2021-07-09 18:07:36,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609914062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:36,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150109300] [2021-07-09 18:07:36,039 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 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 [2021-07-09 18:07:36,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:07:36,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:36,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:36,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150109300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:36,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:36,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:07:36,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393909353] [2021-07-09 18:07:36,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:07:36,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:07:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:07:36,143 INFO L87 Difference]: Start difference. First operand 85004 states and 309811 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-09 18:07:37,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:37,026 INFO L93 Difference]: Finished difference Result 85225 states and 310318 transitions. [2021-07-09 18:07:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:07:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 [2021-07-09 18:07:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:37,550 INFO L225 Difference]: With dead ends: 85225 [2021-07-09 18:07:37,550 INFO L226 Difference]: Without dead ends: 85188 [2021-07-09 18:07:37,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:07:37,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85188 states. [2021-07-09 18:07:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85188 to 84839. [2021-07-09 18:07:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84839 states, 84838 states have (on average 3.645795516160211) internal successors, (309302), 84838 states have internal predecessors, (309302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:39,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84839 states to 84839 states and 309302 transitions. [2021-07-09 18:07:39,759 INFO L78 Accepts]: Start accepts. Automaton has 84839 states and 309302 transitions. Word has length 25 [2021-07-09 18:07:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:39,760 INFO L482 AbstractCegarLoop]: Abstraction has 84839 states and 309302 transitions. [2021-07-09 18:07:39,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-09 18:07:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 84839 states and 309302 transitions. [2021-07-09 18:07:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:39,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:39,909 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:40,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:40,109 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:40,109 INFO L82 PathProgramCache]: Analyzing trace with hash -372630517, now seen corresponding path program 108 times [2021-07-09 18:07:40,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:40,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536062439] [2021-07-09 18:07:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536062439] [2021-07-09 18:07:40,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536062439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824105043] [2021-07-09 18:07:40,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 18:07:40,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 18:07:40,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:40,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:40,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:07:40,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824105043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:40,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:40,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-07-09 18:07:40,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362436518] [2021-07-09 18:07:40,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:07:40,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:07:40,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:07:40,305 INFO L87 Difference]: Start difference. First operand 84839 states and 309302 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-09 18:07:41,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:41,205 INFO L93 Difference]: Finished difference Result 84942 states and 309502 transitions. [2021-07-09 18:07:41,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:07:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 [2021-07-09 18:07:41,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:41,510 INFO L225 Difference]: With dead ends: 84942 [2021-07-09 18:07:41,511 INFO L226 Difference]: Without dead ends: 84847 [2021-07-09 18:07:41,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:07:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84847 states. [2021-07-09 18:07:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84847 to 84780. [2021-07-09 18:07:43,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84780 states, 84779 states have (on average 3.643850481841022) internal successors, (308922), 84779 states have internal predecessors, (308922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84780 states to 84780 states and 308922 transitions. [2021-07-09 18:07:43,865 INFO L78 Accepts]: Start accepts. Automaton has 84780 states and 308922 transitions. Word has length 25 [2021-07-09 18:07:43,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:43,865 INFO L482 AbstractCegarLoop]: Abstraction has 84780 states and 308922 transitions. [2021-07-09 18:07:43,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-09 18:07:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 84780 states and 308922 transitions. [2021-07-09 18:07:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:44,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:44,010 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:44,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:44,211 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 445651607, now seen corresponding path program 109 times [2021-07-09 18:07:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:44,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891007636] [2021-07-09 18:07:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:44,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891007636] [2021-07-09 18:07:44,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891007636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:44,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484120631] [2021-07-09 18:07:44,276 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 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 [2021-07-09 18:07:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:44,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:44,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484120631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:44,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:44,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-09 18:07:44,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269162276] [2021-07-09 18:07:44,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:07:44,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:44,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:07:44,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:07:44,441 INFO L87 Difference]: Start difference. First operand 84780 states and 308922 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:45,511 INFO L93 Difference]: Finished difference Result 98741 states and 357653 transitions. [2021-07-09 18:07:45,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 18:07:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-07-09 18:07:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:46,065 INFO L225 Difference]: With dead ends: 98741 [2021-07-09 18:07:46,065 INFO L226 Difference]: Without dead ends: 98669 [2021-07-09 18:07:46,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:07:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98669 states. [2021-07-09 18:07:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98669 to 86019. [2021-07-09 18:07:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86019 states, 86018 states have (on average 3.643783859192262) internal successors, (313431), 86018 states have internal predecessors, (313431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86019 states to 86019 states and 313431 transitions. [2021-07-09 18:07:48,534 INFO L78 Accepts]: Start accepts. Automaton has 86019 states and 313431 transitions. Word has length 25 [2021-07-09 18:07:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:48,534 INFO L482 AbstractCegarLoop]: Abstraction has 86019 states and 313431 transitions. [2021-07-09 18:07:48,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86019 states and 313431 transitions. [2021-07-09 18:07:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:48,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:48,692 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:48,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:07:48,908 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash -743631491, now seen corresponding path program 110 times [2021-07-09 18:07:48,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:48,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344633440] [2021-07-09 18:07:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:48,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:48,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344633440] [2021-07-09 18:07:48,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344633440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:48,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155348869] [2021-07-09 18:07:48,967 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 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 [2021-07-09 18:07:48,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:07:48,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:07:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:07:49,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155348869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:49,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:49,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 18:07:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400358972] [2021-07-09 18:07:49,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:07:49,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:07:49,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:07:49,102 INFO L87 Difference]: Start difference. First operand 86019 states and 313431 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:50,034 INFO L93 Difference]: Finished difference Result 86639 states and 315121 transitions. [2021-07-09 18:07:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:07:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:07:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:50,390 INFO L225 Difference]: With dead ends: 86639 [2021-07-09 18:07:50,391 INFO L226 Difference]: Without dead ends: 86578 [2021-07-09 18:07:50,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:07:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86578 states. [2021-07-09 18:07:52,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86578 to 86023. [2021-07-09 18:07:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86023 states, 86022 states have (on average 3.6426960544976867) internal successors, (313352), 86022 states have internal predecessors, (313352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86023 states to 86023 states and 313352 transitions. [2021-07-09 18:07:52,852 INFO L78 Accepts]: Start accepts. Automaton has 86023 states and 313352 transitions. Word has length 25 [2021-07-09 18:07:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:07:52,852 INFO L482 AbstractCegarLoop]: Abstraction has 86023 states and 313352 transitions. [2021-07-09 18:07:52,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 86023 states and 313352 transitions. [2021-07-09 18:07:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:07:53,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:07:53,007 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:07:53,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-07-09 18:07:53,207 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:07:53,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:07:53,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1565279795, now seen corresponding path program 25 times [2021-07-09 18:07:53,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:07:53,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110926150] [2021-07-09 18:07:53,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:07:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:53,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:07:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110926150] [2021-07-09 18:07:53,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110926150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:53,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009262816] [2021-07-09 18:07:53,241 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 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 [2021-07-09 18:07:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:07:53,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:07:53,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:07:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:07:53,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009262816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:07:53,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:07:53,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:07:53,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312175369] [2021-07-09 18:07:53,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:07:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:07:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:07:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:07:53,327 INFO L87 Difference]: Start difference. First operand 86023 states and 313352 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:07:55,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:07:55,033 INFO L93 Difference]: Finished difference Result 182520 states and 664068 transitions. [2021-07-09 18:07:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:07:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:07:55,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:07:55,815 INFO L225 Difference]: With dead ends: 182520 [2021-07-09 18:07:55,815 INFO L226 Difference]: Without dead ends: 182506 [2021-07-09 18:07:55,815 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:07:56,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182506 states. [2021-07-09 18:07:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182506 to 178615. [2021-07-09 18:07:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178615 states, 178614 states have (on average 3.650077821447367) internal successors, (651955), 178614 states have internal predecessors, (651955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178615 states to 178615 states and 651955 transitions. [2021-07-09 18:08:01,061 INFO L78 Accepts]: Start accepts. Automaton has 178615 states and 651955 transitions. Word has length 25 [2021-07-09 18:08:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:01,061 INFO L482 AbstractCegarLoop]: Abstraction has 178615 states and 651955 transitions. [2021-07-09 18:08:01,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 178615 states and 651955 transitions. [2021-07-09 18:08:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:08:01,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:01,661 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:01,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 18:08:01,862 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1079475691, now seen corresponding path program 26 times [2021-07-09 18:08:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:01,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910129437] [2021-07-09 18:08:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:01,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:01,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910129437] [2021-07-09 18:08:01,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910129437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:01,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110575730] [2021-07-09 18:08:01,892 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 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 [2021-07-09 18:08:01,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:08:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:08:01,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:01,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110575730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:01,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:01,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:08:01,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883268337] [2021-07-09 18:08:01,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:08:01,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:01,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:08:01,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:08:01,968 INFO L87 Difference]: Start difference. First operand 178615 states and 651955 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:04,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:08:04,716 INFO L93 Difference]: Finished difference Result 310258 states and 1130711 transitions. [2021-07-09 18:08:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:08:04,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-09 18:08:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:08:06,479 INFO L225 Difference]: With dead ends: 310258 [2021-07-09 18:08:06,479 INFO L226 Difference]: Without dead ends: 310258 [2021-07-09 18:08:06,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:08:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310258 states. [2021-07-09 18:08:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310258 to 307681. [2021-07-09 18:08:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307681 states, 307680 states have (on average 3.6506727769110765) internal successors, (1123239), 307680 states have internal predecessors, (1123239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:17,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307681 states to 307681 states and 1123239 transitions. [2021-07-09 18:08:17,248 INFO L78 Accepts]: Start accepts. Automaton has 307681 states and 1123239 transitions. Word has length 25 [2021-07-09 18:08:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:08:17,248 INFO L482 AbstractCegarLoop]: Abstraction has 307681 states and 1123239 transitions. [2021-07-09 18:08:17,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:08:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 307681 states and 1123239 transitions. [2021-07-09 18:08:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:08:18,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:08:18,268 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:08:18,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-07-09 18:08:18,482 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:08:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:08:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash -373421423, now seen corresponding path program 27 times [2021-07-09 18:08:18,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:08:18,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633782710] [2021-07-09 18:08:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:08:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:08:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:18,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:08:18,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633782710] [2021-07-09 18:08:18,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633782710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:18,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437485489] [2021-07-09 18:08:18,515 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 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 [2021-07-09 18:08:18,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:08:18,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:08:18,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:08:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:08:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:08:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437485489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:08:18,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:08:18,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-09 18:08:18,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493195320] [2021-07-09 18:08:18,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:08:18,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:08:18,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:08:18,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:08:18,592 INFO L87 Difference]: Start difference. First operand 307681 states and 1123239 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)