/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-multidimensional/max-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:42:28,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:42:28,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:42:28,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:42:28,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:42:28,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:42:28,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:42:28,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:42:28,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:42:28,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:42:28,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:42:28,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:42:28,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:42:28,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:42:28,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:42:28,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:42:28,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:42:28,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:42:28,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:42:28,763 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:42:28,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:42:28,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:42:28,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:42:28,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:42:28,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:42:28,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:42:28,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:42:28,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:42:28,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:42:28,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:42:28,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:42:28,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:42:28,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:42:28,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:42:28,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:42:28,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:42:28,793 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 20:42:28,814 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:42:28,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:42:28,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:42:28,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:42:28,817 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:42:28,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:42:28,817 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:42:28,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:42:28,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:42:28,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:42:28,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:42:28,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:42:28,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:42:28,820 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:42:28,820 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:42:28,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:42:28,820 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:42:28,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:42:28,821 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:42:28,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:42:28,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:42:28,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:42:28,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:42:28,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:42:28,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:42:28,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:42:28,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:42:28,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:42:28,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:42:28,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:42:29,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:42:29,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:42:29,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:42:29,151 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:42:29,152 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:42:29,153 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-11-23 20:42:29,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6c25d5d4/523543c78594464ba6e6d3dca134f671/FLAG9daf12217 [2019-11-23 20:42:29,668 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:42:29,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-11-23 20:42:29,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6c25d5d4/523543c78594464ba6e6d3dca134f671/FLAG9daf12217 [2019-11-23 20:42:30,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6c25d5d4/523543c78594464ba6e6d3dca134f671 [2019-11-23 20:42:30,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:42:30,098 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:42:30,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:30,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:42:30,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:42:30,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7059378e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30, skipping insertion in model container [2019-11-23 20:42:30,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:42:30,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:42:30,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:30,334 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:42:30,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:42:30,456 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:42:30,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30 WrapperNode [2019-11-23 20:42:30,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:42:30,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:30,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:42:30,458 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:42:30,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:42:30,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:42:30,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:42:30,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:42:30,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (1/1) ... [2019-11-23 20:42:30,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:42:30,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:42:30,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:42:30,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:42:30,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (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 20:42:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:42:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:42:30,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:42:30,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:42:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:42:30,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:42:30,855 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:42:30,855 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:42:30,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:30 BoogieIcfgContainer [2019-11-23 20:42:30,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:42:30,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:42:30,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:42:30,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:42:30,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:42:30" (1/3) ... [2019-11-23 20:42:30,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb725c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:30, skipping insertion in model container [2019-11-23 20:42:30,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:42:30" (2/3) ... [2019-11-23 20:42:30,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eb725c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:42:30, skipping insertion in model container [2019-11-23 20:42:30,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:42:30" (3/3) ... [2019-11-23 20:42:30,865 INFO L109 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2019-11-23 20:42:30,878 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:42:30,886 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:42:30,900 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:42:30,925 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:42:30,925 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:42:30,925 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:42:30,925 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:42:30,925 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:42:30,926 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:42:30,926 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:42:30,926 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:42:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-23 20:42:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:42:30,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:30,963 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:30,963 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:30,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2019-11-23 20:42:30,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:30,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572174903] [2019-11-23 20:42:30,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:31,046 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:31,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236655484] [2019-11-23 20:42:31,047 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 20:42:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:31,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:42:31,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:31,152 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 20:42:31,153 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572174903] [2019-11-23 20:42:31,153 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:31,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236655484] [2019-11-23 20:42:31,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:31,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:42:31,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696751175] [2019-11-23 20:42:31,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:42:31,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:31,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:42:31,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:42:31,178 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-23 20:42:31,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:31,199 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2019-11-23 20:42:31,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:42:31,200 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-23 20:42:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:31,210 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:42:31,210 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:42:31,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:42:31,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:42:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 20:42:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:42:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-23 20:42:31,251 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2019-11-23 20:42:31,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:31,251 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-23 20:42:31,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:42:31,252 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-23 20:42:31,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:42:31,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:31,253 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:31,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:31,457 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2019-11-23 20:42:31,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:31,458 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448422828] [2019-11-23 20:42:31,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:31,464 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:31,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090450683] [2019-11-23 20:42:31,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:31,506 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:31,507 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:31,539 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 20:42:31,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448422828] [2019-11-23 20:42:31,540 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:31,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090450683] [2019-11-23 20:42:31,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:31,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:42:31,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436096015] [2019-11-23 20:42:31,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:42:31,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:42:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:42:31,544 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2019-11-23 20:42:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:31,586 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2019-11-23 20:42:31,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:42:31,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:42:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:31,588 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:42:31,588 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:42:31,589 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 20:42:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:42:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-23 20:42:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:42:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2019-11-23 20:42:31,596 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2019-11-23 20:42:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:31,596 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2019-11-23 20:42:31,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:42:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2019-11-23 20:42:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:42:31,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:31,597 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:31,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:31,809 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:31,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2019-11-23 20:42:31,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:31,810 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483649277] [2019-11-23 20:42:31,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:31,815 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:31,815 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49727895] [2019-11-23 20:42:31,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:31,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:31,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:31,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483649277] [2019-11-23 20:42:31,879 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:31,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49727895] [2019-11-23 20:42:31,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:31,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:31,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294142241] [2019-11-23 20:42:31,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:31,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:31,882 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 4 states. [2019-11-23 20:42:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:31,978 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2019-11-23 20:42:31,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:31,979 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:42:31,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:31,980 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:42:31,980 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:42:31,981 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:42:31,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2019-11-23 20:42:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:42:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2019-11-23 20:42:31,988 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2019-11-23 20:42:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:31,989 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2019-11-23 20:42:31,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-11-23 20:42:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:42:31,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:31,990 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 20:42:32,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:32,194 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:32,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2019-11-23 20:42:32,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:32,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628099667] [2019-11-23 20:42:32,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:32,201 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:32,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739344729] [2019-11-23 20:42:32,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:32,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:32,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:32,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628099667] [2019-11-23 20:42:32,274 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:32,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739344729] [2019-11-23 20:42:32,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:32,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:32,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243617967] [2019-11-23 20:42:32,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:32,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:32,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:32,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:32,276 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2019-11-23 20:42:32,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:32,355 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2019-11-23 20:42:32,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:32,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-23 20:42:32,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:32,357 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:42:32,357 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:42:32,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:42:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2019-11-23 20:42:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:42:32,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-23 20:42:32,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2019-11-23 20:42:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:32,366 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-23 20:42:32,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-23 20:42:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:42:32,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:32,367 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:32,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:32,570 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:32,571 INFO L82 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2019-11-23 20:42:32,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:32,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042369964] [2019-11-23 20:42:32,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:32,575 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:32,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502513285] [2019-11-23 20:42:32,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:42:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:32,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:32,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:42:32,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042369964] [2019-11-23 20:42:32,651 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:32,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502513285] [2019-11-23 20:42:32,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:32,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:42:32,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709677441] [2019-11-23 20:42:32,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:32,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:32,653 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2019-11-23 20:42:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:32,761 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2019-11-23 20:42:32,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:32,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-23 20:42:32,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:32,762 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:42:32,762 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:42:32,763 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:42:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:42:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2019-11-23 20:42:32,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:42:32,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-11-23 20:42:32,771 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2019-11-23 20:42:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:32,771 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-11-23 20:42:32,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-11-23 20:42:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:42:32,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:32,772 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:32,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:32,976 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1771086529, now seen corresponding path program 2 times [2019-11-23 20:42:32,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:32,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876924797] [2019-11-23 20:42:32,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:32,982 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:32,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269261182] [2019-11-23 20:42:32,983 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 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 20:42:33,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:42:33,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:33,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:42:33,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:42:33,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876924797] [2019-11-23 20:42:33,057 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:33,057 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269261182] [2019-11-23 20:42:33,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:33,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:42:33,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800554329] [2019-11-23 20:42:33,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:33,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:33,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:33,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:33,059 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2019-11-23 20:42:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:33,124 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2019-11-23 20:42:33,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:33,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:42:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:33,129 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:42:33,129 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:42:33,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:42:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2019-11-23 20:42:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:42:33,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-11-23 20:42:33,145 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2019-11-23 20:42:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:33,145 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-11-23 20:42:33,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:33,146 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-11-23 20:42:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:42:33,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:33,147 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 20:42:33,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:33,351 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:33,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1618381713, now seen corresponding path program 1 times [2019-11-23 20:42:33,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:33,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133393001] [2019-11-23 20:42:33,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:33,357 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:33,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676560265] [2019-11-23 20:42:33,357 INFO L94 rtionOrderModulation]: Keeping assertion order 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 20:42:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:33,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:42:33,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:42:33,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133393001] [2019-11-23 20:42:33,438 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:33,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676560265] [2019-11-23 20:42:33,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:33,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:42:33,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501775789] [2019-11-23 20:42:33,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:42:33,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:33,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:42:33,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:33,440 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2019-11-23 20:42:33,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:33,524 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2019-11-23 20:42:33,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:42:33,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-11-23 20:42:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:33,526 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:42:33,526 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:42:33,526 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:42:33,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2019-11-23 20:42:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:42:33,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2019-11-23 20:42:33,535 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 31 [2019-11-23 20:42:33,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:33,535 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2019-11-23 20:42:33,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:42:33,536 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2019-11-23 20:42:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:42:33,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:33,537 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 20:42:33,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:33,745 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:33,746 INFO L82 PathProgramCache]: Analyzing trace with hash -440379608, now seen corresponding path program 2 times [2019-11-23 20:42:33,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:33,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468918245] [2019-11-23 20:42:33,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:33,750 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:33,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223550989] [2019-11-23 20:42:33,751 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 20:42:33,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:33,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:33,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:42:33,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:42:33,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468918245] [2019-11-23 20:42:33,860 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:33,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223550989] [2019-11-23 20:42:33,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:33,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:42:33,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619205983] [2019-11-23 20:42:33,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:42:33,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:33,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:42:33,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:33,868 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2019-11-23 20:42:33,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:33,981 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2019-11-23 20:42:33,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:42:33,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-23 20:42:33,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:33,983 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:42:33,983 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:42:33,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:42:33,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2019-11-23 20:42:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:42:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-11-23 20:42:33,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 35 [2019-11-23 20:42:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:33,994 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-11-23 20:42:33,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:42:33,995 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-11-23 20:42:33,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:42:33,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:33,996 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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 20:42:34,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:34,199 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:34,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:34,200 INFO L82 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 3 times [2019-11-23 20:42:34,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:34,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396728343] [2019-11-23 20:42:34,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:34,204 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:34,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827153538] [2019-11-23 20:42:34,205 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 20:42:34,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:42:34,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:34,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:34,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:42:34,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396728343] [2019-11-23 20:42:34,270 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:34,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827153538] [2019-11-23 20:42:34,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:34,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:42:34,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959926078] [2019-11-23 20:42:34,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:42:34,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:42:34,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:34,273 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2019-11-23 20:42:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:34,305 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2019-11-23 20:42:34,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:42:34,306 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2019-11-23 20:42:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:34,308 INFO L225 Difference]: With dead ends: 114 [2019-11-23 20:42:34,308 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:42:34,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:42:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:42:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-23 20:42:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:42:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2019-11-23 20:42:34,320 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 39 [2019-11-23 20:42:34,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:34,320 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2019-11-23 20:42:34,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:42:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2019-11-23 20:42:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:42:34,322 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:34,322 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 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 20:42:34,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:34,525 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:34,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1913562003, now seen corresponding path program 4 times [2019-11-23 20:42:34,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:34,526 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023955388] [2019-11-23 20:42:34,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:34,531 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:34,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471110624] [2019-11-23 20:42:34,532 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 20:42:34,588 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:34,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:34,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:42:34,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:34,663 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-23 20:42:34,664 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:42:34,669 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:42:34,669 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:42:34,670 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-23 20:42:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:42:34,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023955388] [2019-11-23 20:42:34,682 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:34,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471110624] [2019-11-23 20:42:34,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:42:34,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 20:42:34,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652709002] [2019-11-23 20:42:34,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:42:34,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:42:34,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:42:34,685 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 6 states. [2019-11-23 20:42:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:34,775 INFO L93 Difference]: Finished difference Result 134 states and 174 transitions. [2019-11-23 20:42:34,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:42:34,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2019-11-23 20:42:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:34,776 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:42:34,777 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:42:34,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:42:34,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:42:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2019-11-23 20:42:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:42:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2019-11-23 20:42:34,788 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 49 [2019-11-23 20:42:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:34,789 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2019-11-23 20:42:34,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:42:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2019-11-23 20:42:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:42:34,790 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:34,790 INFO L410 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:35,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:35,001 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:35,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1694707285, now seen corresponding path program 1 times [2019-11-23 20:42:35,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:35,002 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179416228] [2019-11-23 20:42:35,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:35,007 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:35,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474588824] [2019-11-23 20:42:35,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:42:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:42:35,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:42:35,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:42:35,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179416228] [2019-11-23 20:42:35,141 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:35,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474588824] [2019-11-23 20:42:35,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:35,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:42:35,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737652958] [2019-11-23 20:42:35,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:42:35,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:42:35,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:42:35,146 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand 8 states. [2019-11-23 20:42:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:35,245 INFO L93 Difference]: Finished difference Result 153 states and 190 transitions. [2019-11-23 20:42:35,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:42:35,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2019-11-23 20:42:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:35,246 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:42:35,246 INFO L226 Difference]: Without dead ends: 90 [2019-11-23 20:42:35,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:42:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-23 20:42:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2019-11-23 20:42:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:42:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2019-11-23 20:42:35,264 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 49 [2019-11-23 20:42:35,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:35,265 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2019-11-23 20:42:35,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:42:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2019-11-23 20:42:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:42:35,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:35,269 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:35,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:35,481 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1125890749, now seen corresponding path program 2 times [2019-11-23 20:42:35,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:35,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722963092] [2019-11-23 20:42:35,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:35,488 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:35,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267954368] [2019-11-23 20:42:35,489 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 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 [2019-11-23 20:42:35,540 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:42:35,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:35,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:42:35,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2019-11-23 20:42:35,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722963092] [2019-11-23 20:42:35,608 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:35,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267954368] [2019-11-23 20:42:35,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:35,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:42:35,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217449479] [2019-11-23 20:42:35,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:42:35,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:35,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:42:35,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:35,609 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand 9 states. [2019-11-23 20:42:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:35,722 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2019-11-23 20:42:35,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:42:35,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2019-11-23 20:42:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:35,723 INFO L225 Difference]: With dead ends: 171 [2019-11-23 20:42:35,723 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:42:35,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:42:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:42:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2019-11-23 20:42:35,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:42:35,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2019-11-23 20:42:35,734 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 54 [2019-11-23 20:42:35,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:35,734 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2019-11-23 20:42:35,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:42:35,735 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2019-11-23 20:42:35,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:42:35,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:35,736 INFO L410 BasicCegarLoop]: trace histogram [12, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:35,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:35,940 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:35,940 INFO L82 PathProgramCache]: Analyzing trace with hash 44580715, now seen corresponding path program 3 times [2019-11-23 20:42:35,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:35,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58609352] [2019-11-23 20:42:35,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:35,945 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:35,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084810204] [2019-11-23 20:42:35,945 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 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 [2019-11-23 20:42:35,986 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:42:35,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:35,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:42:35,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:42:36,051 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2019-11-23 20:42:36,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58609352] [2019-11-23 20:42:36,051 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:42:36,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084810204] [2019-11-23 20:42:36,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:42:36,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:42:36,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490182775] [2019-11-23 20:42:36,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:42:36,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:42:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:42:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:42:36,053 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand 5 states. [2019-11-23 20:42:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:42:36,142 INFO L93 Difference]: Finished difference Result 219 states and 280 transitions. [2019-11-23 20:42:36,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:42:36,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-11-23 20:42:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:42:36,145 INFO L225 Difference]: With dead ends: 219 [2019-11-23 20:42:36,146 INFO L226 Difference]: Without dead ends: 192 [2019-11-23 20:42:36,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 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 20:42:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-11-23 20:42:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 106. [2019-11-23 20:42:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:42:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 135 transitions. [2019-11-23 20:42:36,159 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 135 transitions. Word has length 59 [2019-11-23 20:42:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:42:36,159 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 135 transitions. [2019-11-23 20:42:36,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:42:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 135 transitions. [2019-11-23 20:42:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:42:36,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:42:36,161 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:42:36,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:42:36,364 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:42:36,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:42:36,364 INFO L82 PathProgramCache]: Analyzing trace with hash -925001317, now seen corresponding path program 4 times [2019-11-23 20:42:36,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:42:36,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114364106] [2019-11-23 20:42:36,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:42:36,370 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:42:36,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291113956] [2019-11-23 20:42:36,370 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 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 [2019-11-23 20:42:36,424 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:42:36,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:42:36,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:42:36,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:43:53,989 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2019-11-23 20:44:20,687 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 76