/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o200.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:35:37,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:35:37,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:35:38,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:35:38,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:35:38,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:35:38,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:35:38,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:35:38,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:35:38,012 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:35:38,013 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:35:38,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:35:38,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:35:38,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:35:38,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:35:38,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:35:38,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:35:38,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:35:38,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:35:38,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:35:38,024 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:35:38,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:35:38,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:35:38,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:35:38,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:35:38,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:35:38,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:35:38,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:35:38,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:35:38,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:35:38,094 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:35:38,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:35:38,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:35:38,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:35:38,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:35:38,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:35:38,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:35:38,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:35:38,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:35:38,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:35:38,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:35:38,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:35:38,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:35:38,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:35:38,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:35:38,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:35:38,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:35:38,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:38,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:35:38,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:35:38,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:35:38,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:35:38,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:35:38,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:35:38,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:35:38,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:35:38,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:35:38,445 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:35:38,448 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:35:38,450 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:35:38,450 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:35:38,451 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-22 16:35:38,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75ed7e01/6b7d03f9117342bfb9f7aea3308c8686/FLAGfd29fe1e0 [2020-08-22 16:35:39,023 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:35:39,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o200.c [2020-08-22 16:35:39,028 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75ed7e01/6b7d03f9117342bfb9f7aea3308c8686/FLAGfd29fe1e0 [2020-08-22 16:35:39,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b75ed7e01/6b7d03f9117342bfb9f7aea3308c8686 [2020-08-22 16:35:39,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:35:39,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:35:39,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:39,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:35:39,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:35:39,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40e8030c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39, skipping insertion in model container [2020-08-22 16:35:39,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:35:39,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:35:39,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:39,645 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:35:39,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:39,678 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:35:39,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39 WrapperNode [2020-08-22 16:35:39,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:39,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:35:39,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:35:39,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:35:39,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (1/1) ... [2020-08-22 16:35:39,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:35:39,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:35:39,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:35:39,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:35:39,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (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 [2020-08-22 16:35:39,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:35:39,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:35:39,879 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:35:39,879 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:35:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 16:35:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:35:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:35:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:35:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:35:39,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:35:40,050 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:35:40,050 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:35:40,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:40 BoogieIcfgContainer [2020-08-22 16:35:40,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:35:40,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:35:40,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:35:40,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:35:40,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:35:39" (1/3) ... [2020-08-22 16:35:40,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfed893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:40, skipping insertion in model container [2020-08-22 16:35:40,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:39" (2/3) ... [2020-08-22 16:35:40,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfed893 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:40, skipping insertion in model container [2020-08-22 16:35:40,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:40" (3/3) ... [2020-08-22 16:35:40,063 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o200.c [2020-08-22 16:35:40,074 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:35:40,081 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:35:40,095 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:35:40,120 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:35:40,120 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:35:40,120 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:35:40,120 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:35:40,121 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:35:40,121 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:35:40,121 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:35:40,121 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:35:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 16:35:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:35:40,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:40,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:40,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 16:35:40,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:40,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339387362] [2020-08-22 16:35:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,454 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-22 16:35:40,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:35:40,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339387362] [2020-08-22 16:35:40,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:35:40,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:35:40,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793168548] [2020-08-22 16:35:40,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:35:40,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:40,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:35:40,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:40,571 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 16:35:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:40,621 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 16:35:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:35:40,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:35:40,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:40,635 INFO L225 Difference]: With dead ends: 32 [2020-08-22 16:35:40,635 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 16:35:40,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 16:35:40,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 16:35:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:35:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 16:35:40,689 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 16:35:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:40,690 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 16:35:40,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:35:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 16:35:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:35:40,692 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:40,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:40,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:35:40,694 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 16:35:40,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:40,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884270606] [2020-08-22 16:35:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:40,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884270606] [2020-08-22 16:35:40,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529003401] [2020-08-22 16:35:40,939 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 [2020-08-22 16:35:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2020-08-22 16:35:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:41,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:41,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-08-22 16:35:41,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346315111] [2020-08-22 16:35:41,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:35:41,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:41,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:35:41,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:41,125 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-22 16:35:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:41,164 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 16:35:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:35:41,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 16:35:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:41,166 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:35:41,166 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:35:41,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:35:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:35:41,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:35:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:35:41,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 16:35:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:41,175 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:35:41,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:35:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:35:41,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:35:41,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:41,177 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:41,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:35:41,392 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:41,394 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 16:35:41,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:41,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950237946] [2020-08-22 16:35:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:41,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:41,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950237946] [2020-08-22 16:35:41,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915709301] [2020-08-22 16:35:41,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:41,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:41,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:41,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:35:41,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:41,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:41,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-08-22 16:35:41,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047298417] [2020-08-22 16:35:41,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:35:41,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:35:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:41,773 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-08-22 16:35:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:41,819 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 16:35:41,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:35:41,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-08-22 16:35:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:41,821 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:35:41,821 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:35:41,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:35:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:35:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:35:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 16:35:41,829 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 16:35:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:41,830 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 16:35:41,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:35:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 16:35:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:35:41,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:41,832 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:42,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:42,049 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 16:35:42,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:42,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134073917] [2020-08-22 16:35:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:42,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:42,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134073917] [2020-08-22 16:35:42,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287941576] [2020-08-22 16:35:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:42,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:35:42,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2020-08-22 16:35:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:42,476 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:42,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:42,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-08-22 16:35:42,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692830474] [2020-08-22 16:35:42,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 16:35:42,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:42,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 16:35:42,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:42,478 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2020-08-22 16:35:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:42,549 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 16:35:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:35:42,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-08-22 16:35:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:42,551 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:35:42,552 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 16:35:42,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 16:35:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 16:35:42,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:35:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 16:35:42,560 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 16:35:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:42,560 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 16:35:42,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 16:35:42,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 16:35:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:35:42,562 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:42,562 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:42,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:42,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:42,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:42,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 16:35:42,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:42,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446427523] [2020-08-22 16:35:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:42,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:42,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:43,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446427523] [2020-08-22 16:35:43,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807966162] [2020-08-22 16:35:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:43,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:43,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:43,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:35:43,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:43,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:43,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-08-22 16:35:43,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603485499] [2020-08-22 16:35:43,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:35:43,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:35:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:43,216 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2020-08-22 16:35:43,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:43,296 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 16:35:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:35:43,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2020-08-22 16:35:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:43,298 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:35:43,299 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:35:43,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:35:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:35:43,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:35:43,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 16:35:43,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 16:35:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:43,307 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 16:35:43,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:35:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 16:35:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 16:35:43,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:43,309 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:43,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:43,523 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:43,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:43,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 16:35:43,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:43,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275106828] [2020-08-22 16:35:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:43,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275106828] [2020-08-22 16:35:43,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403051190] [2020-08-22 16:35:43,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:43,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-08-22 16:35:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:43,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core [2020-08-22 16:35:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:44,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-08-22 16:35:44,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275554216] [2020-08-22 16:35:44,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 16:35:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 16:35:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:44,036 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2020-08-22 16:35:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:44,121 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 16:35:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:35:44,121 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-22 16:35:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:44,123 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:35:44,123 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:35:44,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:35:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:35:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:35:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 16:35:44,130 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 16:35:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:44,131 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 16:35:44,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 16:35:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 16:35:44,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:35:44,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:44,132 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:44,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:35:44,337 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:44,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:44,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 16:35:44,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:44,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339250875] [2020-08-22 16:35:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:44,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:44,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339250875] [2020-08-22 16:35:44,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126341580] [2020-08-22 16:35:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:44,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-08-22 16:35:44,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-08-22 16:35:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:44,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:44,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-08-22 16:35:44,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938736097] [2020-08-22 16:35:44,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:35:44,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:44,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:35:44,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:44,940 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2020-08-22 16:35:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:45,077 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 16:35:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 16:35:45,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-08-22 16:35:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:45,079 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:35:45,079 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 16:35:45,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 16:35:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 16:35:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:35:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 16:35:45,092 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 16:35:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:45,092 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 16:35:45,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:35:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 16:35:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:35:45,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:45,094 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:45,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:45,309 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 16:35:45,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:45,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031284687] [2020-08-22 16:35:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:45,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031284687] [2020-08-22 16:35:45,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245767859] [2020-08-22 16:35:45,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core [2020-08-22 16:35:45,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:45,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:45,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-08-22 16:35:45,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255436808] [2020-08-22 16:35:45,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:35:45,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:45,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:35:45,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:45,974 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2020-08-22 16:35:46,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:46,112 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 16:35:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:35:46,113 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-22 16:35:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:46,114 INFO L225 Difference]: With dead ends: 43 [2020-08-22 16:35:46,114 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:35:46,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:35:46,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 16:35:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:35:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 16:35:46,124 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 16:35:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:46,124 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 16:35:46,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:35:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 16:35:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:35:46,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:46,126 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:46,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:46,329 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 16:35:46,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:46,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423431032] [2020-08-22 16:35:46,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:46,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423431032] [2020-08-22 16:35:46,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187141052] [2020-08-22 16:35:46,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:46,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:46,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 39 conjunts are in the unsatisfiable core [2020-08-22 16:35:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:47,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:47,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-08-22 16:35:47,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380908707] [2020-08-22 16:35:47,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 16:35:47,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:47,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 16:35:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:47,049 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2020-08-22 16:35:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:47,225 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 16:35:47,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 16:35:47,226 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-08-22 16:35:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:47,228 INFO L225 Difference]: With dead ends: 46 [2020-08-22 16:35:47,231 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:35:47,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:47,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:35:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 16:35:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:35:47,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 16:35:47,247 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 16:35:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:47,248 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 16:35:47,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 16:35:47,248 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 16:35:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:35:47,249 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:47,250 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:47,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:35:47,466 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:47,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:47,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 16:35:47,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:47,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383710434] [2020-08-22 16:35:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:47,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:48,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383710434] [2020-08-22 16:35:48,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594405835] [2020-08-22 16:35:48,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:48,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-08-22 16:35:48,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2020-08-22 16:35:48,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:48,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:48,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-08-22 16:35:48,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648542002] [2020-08-22 16:35:48,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 16:35:48,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:48,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 16:35:48,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:48,303 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2020-08-22 16:35:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:48,521 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 16:35:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 16:35:48,521 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2020-08-22 16:35:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:48,526 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:35:48,526 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:35:48,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:35:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 16:35:48,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:35:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 16:35:48,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 16:35:48,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:48,539 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 16:35:48,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 16:35:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 16:35:48,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:35:48,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:48,540 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:48,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:48,760 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:48,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 16:35:48,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:48,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771163644] [2020-08-22 16:35:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:48,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:48,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:48,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:49,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:49,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771163644] [2020-08-22 16:35:49,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083620445] [2020-08-22 16:35:49,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:49,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:49,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:49,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 47 conjunts are in the unsatisfiable core [2020-08-22 16:35:49,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:49,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:49,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-08-22 16:35:49,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934537133] [2020-08-22 16:35:49,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 16:35:49,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:49,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 16:35:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:49,631 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2020-08-22 16:35:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:49,867 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 16:35:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 16:35:49,869 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2020-08-22 16:35:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:49,871 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:35:49,871 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:35:49,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-08-22 16:35:49,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:35:49,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 16:35:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:35:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 16:35:49,879 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 16:35:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:49,879 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 16:35:49,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 16:35:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 16:35:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:35:49,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:49,881 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:50,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:50,096 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:50,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 16:35:50,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:50,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313030005] [2020-08-22 16:35:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:50,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313030005] [2020-08-22 16:35:50,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999854656] [2020-08-22 16:35:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:07,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-08-22 16:36:07,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:07,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 51 conjunts are in the unsatisfiable core [2020-08-22 16:36:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:36:07,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:07,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-08-22 16:36:07,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871592173] [2020-08-22 16:36:07,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 16:36:07,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:07,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 16:36:07,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:36:07,207 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 28 states. [2020-08-22 16:36:07,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:07,496 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 16:36:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 16:36:07,498 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 16:36:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:07,499 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:36:07,499 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 16:36:07,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:36:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 16:36:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 16:36:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:36:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 16:36:07,525 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 16:36:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:07,525 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 16:36:07,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 16:36:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 16:36:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 16:36:07,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:07,526 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:07,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:36:07,728 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 16:36:07,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:07,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639647721] [2020-08-22 16:36:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:07,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:36:08,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639647721] [2020-08-22 16:36:08,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205501101] [2020-08-22 16:36:08,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:08,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-08-22 16:36:08,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:08,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 55 conjunts are in the unsatisfiable core [2020-08-22 16:36:08,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:36:08,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:08,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-08-22 16:36:08,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087784493] [2020-08-22 16:36:08,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 16:36:08,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 16:36:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:36:08,852 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 30 states. [2020-08-22 16:36:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:09,211 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 16:36:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 16:36:09,212 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-08-22 16:36:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:09,214 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:36:09,214 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 16:36:09,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:36:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 16:36:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 16:36:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:36:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 16:36:09,222 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 16:36:09,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:09,222 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 16:36:09,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 16:36:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 16:36:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:36:09,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:09,223 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:09,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:36:09,428 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:09,428 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 16:36:09,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:09,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469834437] [2020-08-22 16:36:09,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:09,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:36:10,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469834437] [2020-08-22 16:36:10,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363206173] [2020-08-22 16:36:10,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 59 conjunts are in the unsatisfiable core [2020-08-22 16:36:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:36:10,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:10,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-08-22 16:36:10,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552564778] [2020-08-22 16:36:10,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 16:36:10,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:10,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 16:36:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:36:10,587 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2020-08-22 16:36:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:10,997 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 16:36:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 16:36:10,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2020-08-22 16:36:10,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:10,999 INFO L225 Difference]: With dead ends: 61 [2020-08-22 16:36:10,999 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:36:11,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 16:36:11,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:36:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 16:36:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:36:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 16:36:11,006 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 16:36:11,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:11,007 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 16:36:11,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 16:36:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 16:36:11,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 16:36:11,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:11,008 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:11,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:36:11,211 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 16:36:11,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:11,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931327516] [2020-08-22 16:36:11,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:11,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:12,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:12,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:12,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:36:12,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931327516] [2020-08-22 16:36:12,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103917906] [2020-08-22 16:36:12,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-08-22 16:36:12,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:36:12,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:12,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 63 conjunts are in the unsatisfiable core [2020-08-22 16:36:12,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:36:12,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:12,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-08-22 16:36:12,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208762190] [2020-08-22 16:36:12,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 16:36:12,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 16:36:12,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:36:12,517 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-08-22 16:36:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:12,985 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 16:36:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 16:36:12,985 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-08-22 16:36:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:12,986 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:36:12,987 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 16:36:12,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:36:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 16:36:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 16:36:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 16:36:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 16:36:12,994 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 16:36:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:12,994 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 16:36:12,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 16:36:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 16:36:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 16:36:12,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:12,996 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:13,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:13,202 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:13,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:13,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 16:36:13,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:13,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969037604] [2020-08-22 16:36:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:13,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:13,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:36:14,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969037604] [2020-08-22 16:36:14,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927782054] [2020-08-22 16:36:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:15,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-08-22 16:36:15,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2020-08-22 16:36:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 16:36:15,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:15,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-08-22 16:36:15,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47267545] [2020-08-22 16:36:15,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 16:36:15,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:15,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 16:36:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:36:15,811 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2020-08-22 16:36:16,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:16,371 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 16:36:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 16:36:16,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2020-08-22 16:36:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:16,376 INFO L225 Difference]: With dead ends: 67 [2020-08-22 16:36:16,376 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 16:36:16,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:36:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 16:36:16,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 16:36:16,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 16:36:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 16:36:16,388 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 16:36:16,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:16,392 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 16:36:16,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 16:36:16,392 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 16:36:16,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 16:36:16,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:16,394 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:16,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-08-22 16:36:16,600 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:16,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:16,601 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 16:36:16,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:16,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696139043] [2020-08-22 16:36:16,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:17,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:36:17,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696139043] [2020-08-22 16:36:17,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139184860] [2020-08-22 16:36:17,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:36:17,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:36:17,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:36:17,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 71 conjunts are in the unsatisfiable core [2020-08-22 16:36:17,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:36:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 16:36:18,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:36:18,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-08-22 16:36:18,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522173995] [2020-08-22 16:36:18,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 16:36:18,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:36:18,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 16:36:18,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:36:18,121 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2020-08-22 16:36:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:36:18,677 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 16:36:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 16:36:18,678 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2020-08-22 16:36:18,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:36:18,680 INFO L225 Difference]: With dead ends: 70 [2020-08-22 16:36:18,680 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 16:36:18,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 16:36:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 16:36:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 16:36:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 16:36:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 16:36:18,687 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 16:36:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:36:18,688 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 16:36:18,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 16:36:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 16:36:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 16:36:18,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:36:18,690 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:36:18,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-08-22 16:36:18,904 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:36:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:36:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 16:36:18,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:36:18,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077608910] [2020-08-22 16:36:18,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:36:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:18,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:36:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:18,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:36:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:19,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:20,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:20,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:20,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:36:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:36:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 16:36:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077608910] [2020-08-22 16:36:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919563460] [2020-08-22 16:36:20,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true