/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:29:31,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:29:31,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:29:31,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 20:29:31,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:29:31,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:29:31,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:29:31,947 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:29:31,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:29:31,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:29:31,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:29:31,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:29:31,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:29:31,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:29:31,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:29:31,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:29:31,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:29:31,977 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 [2019-11-23 20:29:32,000 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:29:32,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:29:32,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:29:32,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:29:32,001 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:29:32,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:29:32,002 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:29:32,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:29:32,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:29:32,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:29:32,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:29:32,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:29:32,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:29:32,003 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:29:32,003 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:29:32,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:29:32,003 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:29:32,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:29:32,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:29:32,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:29:32,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:29:32,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:29:32,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:29:32,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:29:32,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:29:32,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:29:32,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:29:32,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:29:32,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:29:32,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:29:32,284 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:29:32,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:29:32,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:29:32,307 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:29:32,308 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:29:32,308 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-11-23 20:29:32,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787c119c9/1fc2315350cf49ee939d2de22d7c275a/FLAG49030596b [2019-11-23 20:29:32,777 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:29:32,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-11-23 20:29:32,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787c119c9/1fc2315350cf49ee939d2de22d7c275a/FLAG49030596b [2019-11-23 20:29:33,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/787c119c9/1fc2315350cf49ee939d2de22d7c275a [2019-11-23 20:29:33,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:29:33,224 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:29:33,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:33,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:29:33,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:29:33,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc7f5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33, skipping insertion in model container [2019-11-23 20:29:33,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:29:33,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:29:33,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:33,434 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:29:33,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:33,472 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:29:33,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33 WrapperNode [2019-11-23 20:29:33,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:33,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:33,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:29:33,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:29:33,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:33,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:29:33,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:29:33,611 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:29:33,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (1/1) ... [2019-11-23 20:29:33,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:29:33,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:29:33,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:29:33,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:29:33,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (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 [2019-11-23 20:29:33,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:29:33,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:29:33,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:29:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:29:33,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:29:33,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:29:34,082 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:29:34,083 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 20:29:34,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:34 BoogieIcfgContainer [2019-11-23 20:29:34,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:29:34,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:29:34,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:29:34,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:29:34,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:29:33" (1/3) ... [2019-11-23 20:29:34,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa59727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:34, skipping insertion in model container [2019-11-23 20:29:34,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:33" (2/3) ... [2019-11-23 20:29:34,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fa59727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:34, skipping insertion in model container [2019-11-23 20:29:34,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:34" (3/3) ... [2019-11-23 20:29:34,094 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2019-11-23 20:29:34,105 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:29:34,112 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:29:34,126 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:29:34,153 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:29:34,153 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:29:34,153 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:29:34,153 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:29:34,154 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:29:34,154 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:29:34,154 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:29:34,154 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:29:34,172 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-23 20:29:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:29:34,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:34,180 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:34,181 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:34,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2019-11-23 20:29:34,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:34,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937819266] [2019-11-23 20:29:34,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:29:34,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937819266] [2019-11-23 20:29:34,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:29:34,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:29:34,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309112089] [2019-11-23 20:29:34,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:29:34,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:29:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:34,396 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-23 20:29:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:34,485 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2019-11-23 20:29:34,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:29:34,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:29:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:34,498 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:29:34,498 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:29:34,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:34,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:29:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:29:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:29:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-23 20:29:34,539 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2019-11-23 20:29:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:34,540 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-23 20:29:34,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:29:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-23 20:29:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:29:34,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:34,541 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:34,542 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:34,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:34,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2019-11-23 20:29:34,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:34,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547963850] [2019-11-23 20:29:34,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:29:34,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547963850] [2019-11-23 20:29:34,642 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176765871] [2019-11-23 20:29:34,644 INFO L94 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 [2019-11-23 20:29:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:34,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:29:34,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:29:34,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:34,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:29:34,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713790461] [2019-11-23 20:29:34,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:29:34,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:34,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:29:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:34,752 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2019-11-23 20:29:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:34,850 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-23 20:29:34,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:29:34,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-23 20:29:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:34,852 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:29:34,852 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:29:34,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:29:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:29:34,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:29:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-23 20:29:34,861 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2019-11-23 20:29:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:34,861 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-23 20:29:34,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:29:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-23 20:29:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:29:34,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:34,863 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:35,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:35,076 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:35,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:35,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2019-11-23 20:29:35,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:35,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709404844] [2019-11-23 20:29:35,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:29:35,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709404844] [2019-11-23 20:29:35,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183870588] [2019-11-23 20:29:35,184 INFO L92 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 [2019-11-23 20:29:35,233 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:35,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:35,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:29:35,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:35,256 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:29:35,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:35,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:29:35,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601945751] [2019-11-23 20:29:35,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:29:35,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:35,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:29:35,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:35,259 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-11-23 20:29:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:35,389 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2019-11-23 20:29:35,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:29:35,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-23 20:29:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:35,391 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:29:35,391 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:29:35,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:29:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:29:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:29:35,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-11-23 20:29:35,400 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2019-11-23 20:29:35,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:35,400 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-11-23 20:29:35,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:29:35,401 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-11-23 20:29:35,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:29:35,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:35,402 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:35,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:35,606 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:35,607 INFO L82 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2019-11-23 20:29:35,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:35,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701372454] [2019-11-23 20:29:35,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:29:35,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701372454] [2019-11-23 20:29:35,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771531409] [2019-11-23 20:29:35,735 INFO L92 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 [2019-11-23 20:29:35,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:29:35,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:35,828 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:29:35,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:29:35,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:35,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:29:35,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949524806] [2019-11-23 20:29:35,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:29:35,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:29:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:35,846 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2019-11-23 20:29:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:35,966 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2019-11-23 20:29:35,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:29:35,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-23 20:29:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:35,968 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:29:35,968 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:29:35,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:29:35,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:29:35,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:29:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-23 20:29:35,976 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2019-11-23 20:29:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:35,977 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-23 20:29:35,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:29:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-23 20:29:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:29:35,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:35,978 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:36,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:36,193 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2019-11-23 20:29:36,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:36,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910241019] [2019-11-23 20:29:36,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:29:36,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910241019] [2019-11-23 20:29:36,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147580322] [2019-11-23 20:29:36,326 INFO L92 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 [2019-11-23 20:29:36,391 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:36,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:36,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:29:36,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:29:36,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:36,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:29:36,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808019036] [2019-11-23 20:29:36,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:29:36,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:29:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:36,412 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2019-11-23 20:29:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:36,526 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2019-11-23 20:29:36,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:29:36,526 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-11-23 20:29:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:36,527 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:29:36,527 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:29:36,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:36,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:29:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:29:36,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:29:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2019-11-23 20:29:36,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2019-11-23 20:29:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:36,542 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2019-11-23 20:29:36,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:29:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2019-11-23 20:29:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:29:36,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:36,544 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:36,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:36,748 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:36,749 INFO L82 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2019-11-23 20:29:36,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:36,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609068144] [2019-11-23 20:29:36,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:29:36,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609068144] [2019-11-23 20:29:36,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147555813] [2019-11-23 20:29:36,860 INFO L92 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 [2019-11-23 20:29:37,416 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:29:37,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:37,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:29:37,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:29:37,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:37,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:29:37,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752906140] [2019-11-23 20:29:37,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:29:37,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:37,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:29:37,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:37,463 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2019-11-23 20:29:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:37,587 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2019-11-23 20:29:37,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:29:37,588 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-23 20:29:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:37,589 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:29:37,589 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:29:37,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:29:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:29:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:29:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:29:37,609 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2019-11-23 20:29:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:37,609 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:29:37,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:29:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:29:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:29:37,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:37,613 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:37,818 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:37,818 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:37,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:37,819 INFO L82 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2019-11-23 20:29:37,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:37,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168788197] [2019-11-23 20:29:37,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:37,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:29:37,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168788197] [2019-11-23 20:29:37,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624573347] [2019-11-23 20:29:37,979 INFO L92 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 [2019-11-23 20:29:38,785 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:29:38,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:38,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:29:38,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:29:38,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:38,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:29:38,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839201803] [2019-11-23 20:29:38,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:29:38,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:38,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:29:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:38,812 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2019-11-23 20:29:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:38,952 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2019-11-23 20:29:38,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:29:38,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-11-23 20:29:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:38,953 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:29:38,954 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:29:38,954 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:29:38,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:29:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:29:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2019-11-23 20:29:38,962 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2019-11-23 20:29:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:38,962 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2019-11-23 20:29:38,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:29:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2019-11-23 20:29:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:29:38,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:38,963 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:39,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:39,169 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:39,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:39,170 INFO L82 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2019-11-23 20:29:39,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:39,171 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325918056] [2019-11-23 20:29:39,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:29:39,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325918056] [2019-11-23 20:29:39,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137610849] [2019-11-23 20:29:39,347 INFO L92 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 [2019-11-23 20:29:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:29:39,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:29:39,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:39,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:29:39,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986492108] [2019-11-23 20:29:39,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:29:39,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:29:39,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:39,442 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2019-11-23 20:29:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:39,569 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-23 20:29:39,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:29:39,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-11-23 20:29:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:39,570 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:29:39,570 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:29:39,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:29:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-23 20:29:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:29:39,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-11-23 20:29:39,585 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2019-11-23 20:29:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:39,585 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-11-23 20:29:39,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:29:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-11-23 20:29:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:29:39,586 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:39,587 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:39,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:39,797 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:39,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:39,797 INFO L82 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2019-11-23 20:29:39,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:39,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480434392] [2019-11-23 20:29:39,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:29:39,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480434392] [2019-11-23 20:29:39,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782139791] [2019-11-23 20:29:39,938 INFO L92 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 [2019-11-23 20:29:39,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:39,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:40,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:29:40,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:29:40,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:40,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:29:40,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243008652] [2019-11-23 20:29:40,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:29:40,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:40,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:29:40,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:40,025 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2019-11-23 20:29:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:40,136 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2019-11-23 20:29:40,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:29:40,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-23 20:29:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:40,137 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:29:40,137 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:29:40,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:29:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-23 20:29:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:29:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2019-11-23 20:29:40,146 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2019-11-23 20:29:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:40,146 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2019-11-23 20:29:40,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:29:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2019-11-23 20:29:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:29:40,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:40,148 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:40,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:40,351 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:40,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:40,352 INFO L82 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2019-11-23 20:29:40,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:40,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597362867] [2019-11-23 20:29:40,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:29:40,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597362867] [2019-11-23 20:29:40,502 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412851205] [2019-11-23 20:29:40,502 INFO L92 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 [2019-11-23 20:29:48,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:29:48,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:48,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:29:48,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-23 20:29:48,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:48,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2019-11-23 20:29:48,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486165535] [2019-11-23 20:29:48,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:29:48,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:48,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:29:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:48,539 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 14 states. [2019-11-23 20:29:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:48,705 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2019-11-23 20:29:48,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:29:48,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-11-23 20:29:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:48,706 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:29:48,706 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:29:48,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:29:48,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-23 20:29:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:29:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2019-11-23 20:29:48,715 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2019-11-23 20:29:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:48,715 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2019-11-23 20:29:48,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:29:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2019-11-23 20:29:48,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:29:48,717 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:48,717 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:48,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:48,927 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2019-11-23 20:29:48,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:48,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288340861] [2019-11-23 20:29:48,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-23 20:29:49,058 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288340861] [2019-11-23 20:29:49,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385791311] [2019-11-23 20:29:49,059 INFO L92 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 [2019-11-23 20:29:49,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:49,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:49,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:29:49,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-23 20:29:49,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:49,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:29:49,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306912182] [2019-11-23 20:29:49,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:29:49,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:49,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:29:49,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:49,183 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2019-11-23 20:29:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:49,356 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2019-11-23 20:29:49,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:29:49,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-11-23 20:29:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:49,357 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:29:49,357 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:29:49,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:29:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-23 20:29:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:29:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2019-11-23 20:29:49,372 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2019-11-23 20:29:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:49,372 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2019-11-23 20:29:49,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:29:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2019-11-23 20:29:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:29:49,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:49,375 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:49,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:49,588 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2019-11-23 20:29:49,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:49,589 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388015290] [2019-11-23 20:29:49,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:29:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388015290] [2019-11-23 20:29:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988911824] [2019-11-23 20:29:49,774 INFO L92 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