/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:25:35,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:25:35,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:25:35,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:25:35,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:25:35,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:25:35,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:25:35,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:25:35,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:25:35,874 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:25:35,875 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:25:35,876 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:25:35,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:25:35,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:25:35,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:25:35,879 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:25:35,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:25:35,881 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:25:35,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:25:35,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:25:35,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:25:35,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:25:35,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:25:35,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:25:35,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:25:35,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:25:35,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:25:35,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:25:35,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:25:35,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:25:35,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:25:35,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:25:35,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:25:35,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:25:35,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:25:35,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:25:35,906 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 [2019-11-06 21:25:35,931 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:25:35,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:25:35,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:25:35,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:25:35,933 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:25:35,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:25:35,934 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:25:35,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:25:35,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:25:35,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:25:35,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:25:35,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:25:35,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:25:35,935 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:25:35,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:25:35,936 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:25:35,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:25:35,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:25:35,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:25:35,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:25:35,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:25:35,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:25:35,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:25:35,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:25:35,938 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:25:35,938 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:25:35,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:25:35,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:25:35,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:25:36,213 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:25:36,227 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:25:36,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:25:36,233 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:25:36,233 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:25:36,234 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-11-06 21:25:36,301 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f600e98c3/50d6de81503e4a5a8c5a14296790f5a4/FLAGe17ec4a91 [2019-11-06 21:25:36,772 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:25:36,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-11-06 21:25:36,783 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f600e98c3/50d6de81503e4a5a8c5a14296790f5a4/FLAGe17ec4a91 [2019-11-06 21:25:37,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f600e98c3/50d6de81503e4a5a8c5a14296790f5a4 [2019-11-06 21:25:37,125 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:25:37,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:25:37,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:37,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:25:37,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:25:37,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b930ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37, skipping insertion in model container [2019-11-06 21:25:37,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,145 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:25:37,164 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:25:37,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:37,365 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:25:37,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:25:37,412 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:25:37,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37 WrapperNode [2019-11-06 21:25:37,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:25:37,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:25:37,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:25:37,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:25:37,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (1/1) ... [2019-11-06 21:25:37,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:25:37,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:25:37,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:25:37,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:25:37,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (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 [2019-11-06 21:25:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:25:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:25:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:25:37,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:25:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:25:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 21:25:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 21:25:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:25:37,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:25:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:25:37,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:25:37,779 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:25:37,779 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:25:37,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:37 BoogieIcfgContainer [2019-11-06 21:25:37,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:25:37,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:25:37,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:25:37,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:25:37,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:25:37" (1/3) ... [2019-11-06 21:25:37,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd5856d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:37, skipping insertion in model container [2019-11-06 21:25:37,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:25:37" (2/3) ... [2019-11-06 21:25:37,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd5856d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:25:37, skipping insertion in model container [2019-11-06 21:25:37,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:25:37" (3/3) ... [2019-11-06 21:25:37,789 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-11-06 21:25:37,800 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:25:37,808 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:25:37,829 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:25:37,906 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:25:37,906 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:25:37,906 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:25:37,906 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:25:37,906 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:25:37,907 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:25:37,907 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:25:37,907 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:25:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 21:25:37,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:25:37,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:37,941 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:37,942 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:37,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:37,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-11-06 21:25:37,955 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:37,955 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859586032] [2019-11-06 21:25:37,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:38,067 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859586032] [2019-11-06 21:25:38,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:38,068 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 21:25:38,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147648295] [2019-11-06 21:25:38,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 21:25:38,075 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:38,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 21:25:38,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:25:38,092 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-11-06 21:25:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:38,122 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2019-11-06 21:25:38,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 21:25:38,124 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-06 21:25:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:38,139 INFO L225 Difference]: With dead ends: 53 [2019-11-06 21:25:38,139 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 21:25:38,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 21:25:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 21:25:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 21:25:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 21:25:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-11-06 21:25:38,233 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-11-06 21:25:38,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:38,233 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-11-06 21:25:38,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 21:25:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-11-06 21:25:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-06 21:25:38,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:38,236 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:38,237 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-11-06 21:25:38,239 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:38,240 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818626005] [2019-11-06 21:25:38,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:38,452 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818626005] [2019-11-06 21:25:38,453 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:25:38,453 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:25:38,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809748609] [2019-11-06 21:25:38,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:25:38,455 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:38,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:25:38,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:25:38,456 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-11-06 21:25:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:38,605 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-11-06 21:25:38,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:25:38,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-06 21:25:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:38,607 INFO L225 Difference]: With dead ends: 30 [2019-11-06 21:25:38,607 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 21:25:38,608 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:25:38,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 21:25:38,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 21:25:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 21:25:38,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-11-06 21:25:38,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-11-06 21:25:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:38,622 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-11-06 21:25:38,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:25:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-11-06 21:25:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 21:25:38,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:38,624 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:38,624 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:38,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-11-06 21:25:38,628 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:38,628 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241021136] [2019-11-06 21:25:38,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:38,639 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:38,639 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999420547] [2019-11-06 21:25:38,639 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 [2019-11-06 21:25:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:38,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 21:25:38,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:25:38,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241021136] [2019-11-06 21:25:38,791 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:38,791 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999420547] [2019-11-06 21:25:38,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:38,792 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:25:38,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756530870] [2019-11-06 21:25:38,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:25:38,793 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:38,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:25:38,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:25:38,793 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2019-11-06 21:25:39,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:39,230 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-11-06 21:25:39,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:39,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-06 21:25:39,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:39,233 INFO L225 Difference]: With dead ends: 51 [2019-11-06 21:25:39,233 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 21:25:39,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:39,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 21:25:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-06 21:25:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 21:25:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-11-06 21:25:39,250 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-11-06 21:25:39,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:39,251 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-11-06 21:25:39,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:25:39,252 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-11-06 21:25:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:25:39,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:39,253 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:39,454 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:39,460 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-11-06 21:25:39,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:39,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061947822] [2019-11-06 21:25:39,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:39,471 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:39,471 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453443909] [2019-11-06 21:25:39,472 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 [2019-11-06 21:25:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:39,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 21:25:39,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:25:39,604 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061947822] [2019-11-06 21:25:39,604 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:39,604 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453443909] [2019-11-06 21:25:39,604 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:39,605 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:25:39,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081341571] [2019-11-06 21:25:39,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:25:39,610 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:25:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:25:39,611 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 8 states. [2019-11-06 21:25:39,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:39,878 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-11-06 21:25:39,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:39,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-06 21:25:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:39,881 INFO L225 Difference]: With dead ends: 55 [2019-11-06 21:25:39,881 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 21:25:39,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 21:25:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-06 21:25:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 21:25:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-11-06 21:25:39,907 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-11-06 21:25:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:39,908 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-11-06 21:25:39,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:25:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-11-06 21:25:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:25:39,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:39,911 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:40,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:40,123 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-11-06 21:25:40,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:40,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341989911] [2019-11-06 21:25:40,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:40,130 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:40,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838781472] [2019-11-06 21:25:40,131 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 [2019-11-06 21:25:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:40,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 21:25:40,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 21:25:40,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341989911] [2019-11-06 21:25:40,228 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:40,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838781472] [2019-11-06 21:25:40,229 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:40,229 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:25:40,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559956043] [2019-11-06 21:25:40,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:25:40,230 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:40,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:25:40,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:25:40,231 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2019-11-06 21:25:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:42,705 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2019-11-06 21:25:42,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:42,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-11-06 21:25:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:42,707 INFO L225 Difference]: With dead ends: 59 [2019-11-06 21:25:42,707 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 21:25:42,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 21:25:42,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-06 21:25:42,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 21:25:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-11-06 21:25:42,731 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2019-11-06 21:25:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:42,731 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-11-06 21:25:42,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:25:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-11-06 21:25:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:25:42,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:42,735 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:42,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:42,944 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:42,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1836902192, now seen corresponding path program 1 times [2019-11-06 21:25:42,945 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:42,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75143873] [2019-11-06 21:25:42,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:42,953 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:42,954 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282966623] [2019-11-06 21:25:42,954 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 [2019-11-06 21:25:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:43,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 21:25:43,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-06 21:25:43,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75143873] [2019-11-06 21:25:43,089 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:43,089 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282966623] [2019-11-06 21:25:43,089 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:43,089 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 21:25:43,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201769333] [2019-11-06 21:25:43,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:25:43,091 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:25:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:25:43,091 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2019-11-06 21:25:43,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:43,592 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2019-11-06 21:25:43,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:25:43,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 21:25:43,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:43,594 INFO L225 Difference]: With dead ends: 70 [2019-11-06 21:25:43,594 INFO L226 Difference]: Without dead ends: 68 [2019-11-06 21:25:43,595 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-06 21:25:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-11-06 21:25:43,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 21:25:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-11-06 21:25:43,606 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2019-11-06 21:25:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:43,607 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-11-06 21:25:43,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:25:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-11-06 21:25:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 21:25:43,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:43,609 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:43,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:43,813 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:43,815 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 2 times [2019-11-06 21:25:43,815 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:43,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242567247] [2019-11-06 21:25:43,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:43,824 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:43,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712711616] [2019-11-06 21:25:43,825 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 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 [2019-11-06 21:25:43,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:43,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:43,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 21:25:43,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 21:25:43,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242567247] [2019-11-06 21:25:43,934 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:43,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712711616] [2019-11-06 21:25:43,935 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:43,935 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:43,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590132329] [2019-11-06 21:25:43,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:43,936 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:43,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:43,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:43,936 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2019-11-06 21:25:44,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:44,326 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2019-11-06 21:25:44,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:25:44,326 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-06 21:25:44,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:44,329 INFO L225 Difference]: With dead ends: 78 [2019-11-06 21:25:44,329 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 21:25:44,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:44,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 21:25:44,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-11-06 21:25:44,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-06 21:25:44,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-11-06 21:25:44,344 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 47 [2019-11-06 21:25:44,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:44,344 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-11-06 21:25:44,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:44,345 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-11-06 21:25:44,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 21:25:44,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:44,347 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:44,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:44,551 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:44,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 3 times [2019-11-06 21:25:44,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:44,553 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118877153] [2019-11-06 21:25:44,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:44,560 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:44,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394966599] [2019-11-06 21:25:44,560 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 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 [2019-11-06 21:25:44,585 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 21:25:44,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:44,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 21:25:44,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-06 21:25:44,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118877153] [2019-11-06 21:25:44,634 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:44,634 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394966599] [2019-11-06 21:25:44,634 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:44,634 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 21:25:44,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866822897] [2019-11-06 21:25:44,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:25:44,636 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:44,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:25:44,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:25:44,636 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2019-11-06 21:25:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:44,735 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2019-11-06 21:25:44,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:25:44,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-11-06 21:25:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:44,737 INFO L225 Difference]: With dead ends: 81 [2019-11-06 21:25:44,737 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 21:25:44,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:25:44,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 21:25:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-06 21:25:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-06 21:25:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2019-11-06 21:25:44,753 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 57 [2019-11-06 21:25:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:44,754 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2019-11-06 21:25:44,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:25:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2019-11-06 21:25:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-06 21:25:44,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:44,755 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:44,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:44,964 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-11-06 21:25:44,964 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:44,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563866156] [2019-11-06 21:25:44,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:44,971 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:44,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432887861] [2019-11-06 21:25:44,982 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 [2019-11-06 21:25:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:45,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:25:45,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:45,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-06 21:25:45,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563866156] [2019-11-06 21:25:45,156 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:45,156 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432887861] [2019-11-06 21:25:45,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:45,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:45,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889342282] [2019-11-06 21:25:45,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:45,157 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:45,158 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 9 states. [2019-11-06 21:25:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:45,488 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2019-11-06 21:25:45,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:45,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-11-06 21:25:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:45,489 INFO L225 Difference]: With dead ends: 88 [2019-11-06 21:25:45,490 INFO L226 Difference]: Without dead ends: 86 [2019-11-06 21:25:45,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:25:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-06 21:25:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-06 21:25:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 21:25:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2019-11-06 21:25:45,504 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 68 [2019-11-06 21:25:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:45,505 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2019-11-06 21:25:45,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2019-11-06 21:25:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 21:25:45,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:45,507 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:45,709 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:45,710 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:45,711 INFO L82 PathProgramCache]: Analyzing trace with hash -109766700, now seen corresponding path program 4 times [2019-11-06 21:25:45,711 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:45,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698717223] [2019-11-06 21:25:45,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:45,722 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:45,722 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098258460] [2019-11-06 21:25:45,723 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 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 [2019-11-06 21:25:45,757 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 21:25:45,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:45,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 21:25:45,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2019-11-06 21:25:45,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698717223] [2019-11-06 21:25:45,886 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:45,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098258460] [2019-11-06 21:25:45,886 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:45,886 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:45,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356129696] [2019-11-06 21:25:45,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:45,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:45,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:45,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:45,888 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand 9 states. [2019-11-06 21:25:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:46,069 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2019-11-06 21:25:46,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:25:46,069 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-11-06 21:25:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:46,071 INFO L225 Difference]: With dead ends: 92 [2019-11-06 21:25:46,071 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 21:25:46,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:46,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 21:25:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-11-06 21:25:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 21:25:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2019-11-06 21:25:46,083 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 69 [2019-11-06 21:25:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:46,084 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2019-11-06 21:25:46,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2019-11-06 21:25:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 21:25:46,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:46,086 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:46,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:46,290 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:46,290 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-11-06 21:25:46,291 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:46,291 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167095165] [2019-11-06 21:25:46,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:46,306 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:46,306 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624869908] [2019-11-06 21:25:46,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:25:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:46,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 21:25:46,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:46,453 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-06 21:25:46,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167095165] [2019-11-06 21:25:46,487 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:46,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624869908] [2019-11-06 21:25:46,487 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:46,489 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:46,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070912971] [2019-11-06 21:25:46,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:46,490 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:46,496 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 9 states. [2019-11-06 21:25:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:46,804 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-11-06 21:25:46,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:46,805 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2019-11-06 21:25:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:46,807 INFO L225 Difference]: With dead ends: 96 [2019-11-06 21:25:46,807 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 21:25:46,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:25:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 21:25:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-11-06 21:25:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-06 21:25:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-11-06 21:25:46,819 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 73 [2019-11-06 21:25:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:46,819 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-11-06 21:25:46,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-11-06 21:25:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 21:25:46,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:46,821 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:47,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:47,028 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:47,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:47,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1693450736, now seen corresponding path program 5 times [2019-11-06 21:25:47,029 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:47,029 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132971561] [2019-11-06 21:25:47,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:47,035 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:47,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098211860] [2019-11-06 21:25:47,035 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 21:25:47,099 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 21:25:47,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:47,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 21:25:47,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-06 21:25:47,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132971561] [2019-11-06 21:25:47,195 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:47,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098211860] [2019-11-06 21:25:47,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:47,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:47,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024551691] [2019-11-06 21:25:47,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:47,196 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:47,197 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 9 states. [2019-11-06 21:25:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:47,687 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2019-11-06 21:25:47,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:47,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2019-11-06 21:25:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:47,689 INFO L225 Difference]: With dead ends: 113 [2019-11-06 21:25:47,689 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 21:25:47,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 21:25:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2019-11-06 21:25:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 21:25:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2019-11-06 21:25:47,701 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 74 [2019-11-06 21:25:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:47,701 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2019-11-06 21:25:47,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2019-11-06 21:25:47,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 21:25:47,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:47,703 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:47,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:47,911 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1818484460, now seen corresponding path program 6 times [2019-11-06 21:25:47,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:47,912 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236095591] [2019-11-06 21:25:47,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:47,926 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:47,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815938833] [2019-11-06 21:25:47,926 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 21:25:48,165 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 21:25:48,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:48,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 21:25:48,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 28 proven. 51 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 21:25:48,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236095591] [2019-11-06 21:25:48,265 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:48,266 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815938833] [2019-11-06 21:25:48,266 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:48,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 21:25:48,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745339308] [2019-11-06 21:25:48,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:25:48,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:48,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:25:48,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:25:48,267 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand 9 states. [2019-11-06 21:25:50,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:50,662 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2019-11-06 21:25:50,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:25:50,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2019-11-06 21:25:50,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:50,664 INFO L225 Difference]: With dead ends: 109 [2019-11-06 21:25:50,664 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 21:25:50,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 21:25:50,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-11-06 21:25:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-06 21:25:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2019-11-06 21:25:50,674 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 79 [2019-11-06 21:25:50,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:50,675 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2019-11-06 21:25:50,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:25:50,675 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2019-11-06 21:25:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 21:25:50,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:50,677 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:50,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:50,880 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:50,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:50,881 INFO L82 PathProgramCache]: Analyzing trace with hash -622434639, now seen corresponding path program 2 times [2019-11-06 21:25:50,881 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:50,881 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734809182] [2019-11-06 21:25:50,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:50,887 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:50,887 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143237207] [2019-11-06 21:25:50,887 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 [2019-11-06 21:25:50,933 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:50,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:50,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 21:25:50,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:51,036 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-11-06 21:25:51,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734809182] [2019-11-06 21:25:51,062 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:51,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143237207] [2019-11-06 21:25:51,063 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:51,063 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:25:51,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602515740] [2019-11-06 21:25:51,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:25:51,063 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:25:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:51,064 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand 10 states. [2019-11-06 21:25:51,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:51,486 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2019-11-06 21:25:51,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:25:51,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2019-11-06 21:25:51,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:51,488 INFO L225 Difference]: With dead ends: 114 [2019-11-06 21:25:51,488 INFO L226 Difference]: Without dead ends: 112 [2019-11-06 21:25:51,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-06 21:25:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-11-06 21:25:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-06 21:25:51,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2019-11-06 21:25:51,499 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 95 [2019-11-06 21:25:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:51,499 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2019-11-06 21:25:51,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:25:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2019-11-06 21:25:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 21:25:51,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:51,501 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:51,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:51,704 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:51,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1439689715, now seen corresponding path program 2 times [2019-11-06 21:25:51,705 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:51,706 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732677414] [2019-11-06 21:25:51,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:51,711 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:51,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453005074] [2019-11-06 21:25:51,712 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 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 [2019-11-06 21:25:51,751 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:51,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:51,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 21:25:51,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:51,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:25:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 21:25:51,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732677414] [2019-11-06 21:25:51,852 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:51,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453005074] [2019-11-06 21:25:51,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:51,853 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:25:51,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758920090] [2019-11-06 21:25:51,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:25:51,853 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:51,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:25:51,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:51,854 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 10 states. [2019-11-06 21:25:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:52,263 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2019-11-06 21:25:52,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:25:52,264 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2019-11-06 21:25:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:52,265 INFO L225 Difference]: With dead ends: 122 [2019-11-06 21:25:52,265 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 21:25:52,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:52,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 21:25:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-11-06 21:25:52,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 21:25:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2019-11-06 21:25:52,275 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 100 [2019-11-06 21:25:52,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:52,276 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2019-11-06 21:25:52,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:25:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2019-11-06 21:25:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 21:25:52,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:52,277 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:52,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:52,481 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1551568652, now seen corresponding path program 7 times [2019-11-06 21:25:52,482 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:52,482 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369032165] [2019-11-06 21:25:52,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:52,490 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:52,490 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1839151878] [2019-11-06 21:25:52,490 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 21:25:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:25:52,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-06 21:25:52,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-11-06 21:25:52,641 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369032165] [2019-11-06 21:25:52,642 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:52,642 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839151878] [2019-11-06 21:25:52,642 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:52,642 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 21:25:52,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220496215] [2019-11-06 21:25:52,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 21:25:52,643 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:52,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 21:25:52,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:25:52,643 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 10 states. [2019-11-06 21:25:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:53,174 INFO L93 Difference]: Finished difference Result 128 states and 147 transitions. [2019-11-06 21:25:53,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:25:53,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2019-11-06 21:25:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:53,181 INFO L225 Difference]: With dead ends: 128 [2019-11-06 21:25:53,181 INFO L226 Difference]: Without dead ends: 126 [2019-11-06 21:25:53,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:25:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-06 21:25:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2019-11-06 21:25:53,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 21:25:53,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2019-11-06 21:25:53,191 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 101 [2019-11-06 21:25:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:53,192 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2019-11-06 21:25:53,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 21:25:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2019-11-06 21:25:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 21:25:53,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:53,194 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:53,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:53,397 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash 781710480, now seen corresponding path program 8 times [2019-11-06 21:25:53,397 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:53,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203856379] [2019-11-06 21:25:53,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:53,403 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:53,403 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668006825] [2019-11-06 21:25:53,403 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:53,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:25:53,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:25:53,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 21:25:53,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:25:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 80 proven. 43 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-11-06 21:25:53,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203856379] [2019-11-06 21:25:53,568 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 21:25:53,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668006825] [2019-11-06 21:25:53,568 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:25:53,568 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-06 21:25:53,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215427369] [2019-11-06 21:25:53,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:25:53,569 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:25:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:25:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:25:53,570 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand 11 states. [2019-11-06 21:25:54,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:25:54,189 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2019-11-06 21:25:54,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:25:54,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2019-11-06 21:25:54,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:25:54,191 INFO L225 Difference]: With dead ends: 140 [2019-11-06 21:25:54,191 INFO L226 Difference]: Without dead ends: 135 [2019-11-06 21:25:54,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-06 21:25:54,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-06 21:25:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2019-11-06 21:25:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-06 21:25:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2019-11-06 21:25:54,212 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 106 [2019-11-06 21:25:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:25:54,212 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2019-11-06 21:25:54,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:25:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2019-11-06 21:25:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-06 21:25:54,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:25:54,214 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:25:54,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:25:54,417 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:25:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:25:54,418 INFO L82 PathProgramCache]: Analyzing trace with hash 874758701, now seen corresponding path program 3 times [2019-11-06 21:25:54,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:25:54,419 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102825383] [2019-11-06 21:25:54,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:25:54,425 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 21:25:54,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566041029] [2019-11-06 21:25:54,426 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true