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/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:41:40,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:41:40,622 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:41:40,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:41:40,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:41:40,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:41:40,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:41:40,643 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:41:40,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:41:40,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:41:40,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:41:40,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:41:40,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:41:40,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:41:40,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:41:40,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:41:40,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:41:40,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:41:40,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:41:40,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:41:40,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:41:40,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:41:40,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:41:40,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:41:40,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:41:40,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:41:40,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:41:40,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:41:40,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:41:40,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:41:40,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:41:40,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:41:40,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:41:40,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:41:40,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:41:40,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:41:40,700 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 [2019-10-14 21:41:40,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:41:40,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:41:40,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:41:40,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:41:40,726 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:41:40,727 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:41:40,727 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:41:40,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:41:40,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:41:40,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:41:40,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:41:40,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:41:40,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:41:40,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:41:40,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:41:40,729 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:41:40,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:41:40,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:41:40,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:41:40,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:41:40,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:41:40,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:41:40,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:41:40,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:41:40,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:41:40,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:41:40,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:41:40,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:41:40,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:41:40,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:41:41,002 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:41:41,006 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:41:41,007 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:41:41,008 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:41:41,009 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-10-14 21:41:41,082 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ba958a2/aaa3f2a9888b4b2fb949c9175da369f7/FLAG929f0e944 [2019-10-14 21:41:41,580 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:41:41,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2019-10-14 21:41:41,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ba958a2/aaa3f2a9888b4b2fb949c9175da369f7/FLAG929f0e944 [2019-10-14 21:41:42,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61ba958a2/aaa3f2a9888b4b2fb949c9175da369f7 [2019-10-14 21:41:42,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:41:42,015 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:41:42,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:42,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:41:42,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:41:42,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c49610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42, skipping insertion in model container [2019-10-14 21:41:42,027 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,035 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:41:42,056 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:41:42,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:42,264 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:41:42,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:41:42,424 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:41:42,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42 WrapperNode [2019-10-14 21:41:42,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:41:42,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:41:42,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:41:42,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:41:42,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (1/1) ... [2019-10-14 21:41:42,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:41:42,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:41:42,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:41:42,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:41:42,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (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 [2019-10-14 21:41:42,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:41:42,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:41:42,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:41:42,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:41:42,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:41:42,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:41:42,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:41:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-10-14 21:41:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:41:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:41:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:41:42,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:41:42,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:41:42,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:41:42,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:41:42,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:41:42,888 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:41:42,888 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:41:42,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:42 BoogieIcfgContainer [2019-10-14 21:41:42,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:41:42,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:41:42,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:41:42,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:41:42,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:41:42" (1/3) ... [2019-10-14 21:41:42,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbf670d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:42, skipping insertion in model container [2019-10-14 21:41:42,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:41:42" (2/3) ... [2019-10-14 21:41:42,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbf670d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:41:42, skipping insertion in model container [2019-10-14 21:41:42,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:41:42" (3/3) ... [2019-10-14 21:41:42,898 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2019-10-14 21:41:42,908 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:41:42,916 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:41:42,930 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:41:42,953 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:41:42,953 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:41:42,953 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:41:42,954 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:41:42,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:41:42,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:41:42,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:41:42,954 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:41:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-14 21:41:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:42,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:42,980 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:42,982 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:42,987 INFO L82 PathProgramCache]: Analyzing trace with hash 299774862, now seen corresponding path program 1 times [2019-10-14 21:41:42,993 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:42,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918203679] [2019-10-14 21:41:42,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:42,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:42,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:43,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:43,188 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918203679] [2019-10-14 21:41:43,189 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:43,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:41:43,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849452631] [2019-10-14 21:41:43,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:41:43,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:43,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:41:43,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:43,213 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-14 21:41:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:43,389 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2019-10-14 21:41:43,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:41:43,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-14 21:41:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:43,402 INFO L225 Difference]: With dead ends: 81 [2019-10-14 21:41:43,403 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:41:43,408 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:41:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:41:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 21:41:43,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:41:43,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:41:43,448 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2019-10-14 21:41:43,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:43,449 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:41:43,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:41:43,449 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:41:43,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:41:43,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:43,451 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:43,452 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash 268068598, now seen corresponding path program 1 times [2019-10-14 21:41:43,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:43,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347830005] [2019-10-14 21:41:43,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:43,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:43,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:43,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347830005] [2019-10-14 21:41:43,621 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:43,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:41:43,622 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209370385] [2019-10-14 21:41:43,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:41:43,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:43,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:41:43,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:43,626 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2019-10-14 21:41:43,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:43,818 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2019-10-14 21:41:43,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:43,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-14 21:41:43,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:43,820 INFO L225 Difference]: With dead ends: 58 [2019-10-14 21:41:43,821 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 21:41:43,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 21:41:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 21:41:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:41:43,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-10-14 21:41:43,846 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 28 [2019-10-14 21:41:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:43,847 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-10-14 21:41:43,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:41:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-10-14 21:41:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:41:43,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:43,852 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:43,854 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:43,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:43,855 INFO L82 PathProgramCache]: Analyzing trace with hash 962591476, now seen corresponding path program 1 times [2019-10-14 21:41:43,855 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:43,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185222875] [2019-10-14 21:41:43,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:43,856 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:43,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:41:43,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185222875] [2019-10-14 21:41:43,967 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:43,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:41:43,968 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257160651] [2019-10-14 21:41:43,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:41:43,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:43,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:41:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:43,969 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 4 states. [2019-10-14 21:41:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:44,084 INFO L93 Difference]: Finished difference Result 99 states and 129 transitions. [2019-10-14 21:41:44,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:41:44,084 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-14 21:41:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:44,085 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:41:44,086 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 21:41:44,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:41:44,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 21:41:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 21:41:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:41:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2019-10-14 21:41:44,096 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2019-10-14 21:41:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:44,096 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2019-10-14 21:41:44,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:41:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2019-10-14 21:41:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 21:41:44,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:44,098 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:44,098 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:44,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:44,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1516091022, now seen corresponding path program 1 times [2019-10-14 21:41:44,099 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:44,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311449750] [2019-10-14 21:41:44,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 21:41:44,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311449750] [2019-10-14 21:41:44,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:41:44,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:41:44,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785001216] [2019-10-14 21:41:44,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:41:44,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:41:44,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:41:44,193 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 5 states. [2019-10-14 21:41:44,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:44,379 INFO L93 Difference]: Finished difference Result 95 states and 123 transitions. [2019-10-14 21:41:44,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:44,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-10-14 21:41:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:44,381 INFO L225 Difference]: With dead ends: 95 [2019-10-14 21:41:44,381 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 21:41:44,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:41:44,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 21:41:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-14 21:41:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 21:41:44,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-14 21:41:44,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2019-10-14 21:41:44,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:44,400 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-14 21:41:44,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:41:44,400 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-14 21:41:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 21:41:44,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:44,403 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:44,403 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash 94574052, now seen corresponding path program 1 times [2019-10-14 21:41:44,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:44,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672741067] [2019-10-14 21:41:44,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:44,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:44,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672741067] [2019-10-14 21:41:44,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050635203] [2019-10-14 21:41:44,557 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 [2019-10-14 21:41:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:44,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:44,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:41:44,698 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:44,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:41:44,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298737532] [2019-10-14 21:41:44,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:41:44,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:44,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:41:44,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:44,702 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 7 states. [2019-10-14 21:41:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:44,860 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-10-14 21:41:44,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:41:44,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2019-10-14 21:41:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:44,862 INFO L225 Difference]: With dead ends: 87 [2019-10-14 21:41:44,862 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:41:44,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:41:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:41:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 21:41:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:41:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-10-14 21:41:44,870 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 46 [2019-10-14 21:41:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:44,871 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-10-14 21:41:44,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:41:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-10-14 21:41:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 21:41:44,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:44,875 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:45,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:45,077 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,078 INFO L82 PathProgramCache]: Analyzing trace with hash 589604962, now seen corresponding path program 2 times [2019-10-14 21:41:45,078 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426914480] [2019-10-14 21:41:45,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,079 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:41:45,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426914480] [2019-10-14 21:41:45,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180070679] [2019-10-14 21:41:45,240 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:45,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:41:45,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:45,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:41:45,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 21:41:45,379 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:45,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 21:41:45,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636114751] [2019-10-14 21:41:45,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:41:45,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:45,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:41:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:41:45,381 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 8 states. [2019-10-14 21:41:45,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:45,638 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2019-10-14 21:41:45,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:41:45,639 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2019-10-14 21:41:45,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:45,640 INFO L225 Difference]: With dead ends: 107 [2019-10-14 21:41:45,640 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:41:45,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:41:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:41:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-10-14 21:41:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-14 21:41:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2019-10-14 21:41:45,650 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2019-10-14 21:41:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:45,650 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2019-10-14 21:41:45,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:41:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2019-10-14 21:41:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 21:41:45,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:45,652 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:45,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:45,856 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:45,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1474058926, now seen corresponding path program 3 times [2019-10-14 21:41:45,857 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:45,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898723470] [2019-10-14 21:41:45,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:45,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:47,463 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:47,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898723470] [2019-10-14 21:41:47,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130282795] [2019-10-14 21:41:47,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:47,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:41:47,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:47,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 88 conjunts are in the unsatisfiable core [2019-10-14 21:41:47,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:49,130 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:49,130 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2019-10-14 21:41:49,132 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-10-14 21:41:49,141 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:41:49,142 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:41:49,143 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:22 [2019-10-14 21:41:49,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:49,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:49,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:41:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:41:49,374 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:49,374 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 28] total 45 [2019-10-14 21:41:49,374 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571969045] [2019-10-14 21:41:49,375 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-14 21:41:49,375 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:49,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-14 21:41:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 21:41:49,377 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 45 states. [2019-10-14 21:41:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:52,026 INFO L93 Difference]: Finished difference Result 174 states and 198 transitions. [2019-10-14 21:41:52,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 21:41:52,027 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 64 [2019-10-14 21:41:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:52,031 INFO L225 Difference]: With dead ends: 174 [2019-10-14 21:41:52,032 INFO L226 Difference]: Without dead ends: 168 [2019-10-14 21:41:52,036 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 32 SyntacticMatches, 37 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=316, Invalid=3466, Unknown=0, NotChecked=0, Total=3782 [2019-10-14 21:41:52,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-14 21:41:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2019-10-14 21:41:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-14 21:41:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 121 transitions. [2019-10-14 21:41:52,066 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 121 transitions. Word has length 64 [2019-10-14 21:41:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:52,066 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 121 transitions. [2019-10-14 21:41:52,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-14 21:41:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 121 transitions. [2019-10-14 21:41:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 21:41:52,071 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:52,071 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:52,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:52,285 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:52,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1815286352, now seen corresponding path program 4 times [2019-10-14 21:41:52,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:52,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174675670] [2019-10-14 21:41:52,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:52,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:41:52,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174675670] [2019-10-14 21:41:52,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345909637] [2019-10-14 21:41:52,388 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:52,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:41:52,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:52,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:52,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-14 21:41:52,514 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:52,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:52,515 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459408464] [2019-10-14 21:41:52,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:52,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:52,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:52,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:52,516 INFO L87 Difference]: Start difference. First operand 106 states and 121 transitions. Second operand 14 states. [2019-10-14 21:41:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:53,056 INFO L93 Difference]: Finished difference Result 237 states and 273 transitions. [2019-10-14 21:41:53,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:41:53,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-14 21:41:53,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:53,060 INFO L225 Difference]: With dead ends: 237 [2019-10-14 21:41:53,061 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 21:41:53,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:41:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 21:41:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 117. [2019-10-14 21:41:53,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:41:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2019-10-14 21:41:53,080 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 66 [2019-10-14 21:41:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:53,081 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2019-10-14 21:41:53,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2019-10-14 21:41:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:41:53,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:53,084 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:53,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:53,286 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1556829298, now seen corresponding path program 5 times [2019-10-14 21:41:53,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:53,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894113361] [2019-10-14 21:41:53,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:53,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:53,400 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:41:53,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894113361] [2019-10-14 21:41:53,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529004740] [2019-10-14 21:41:53,403 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:53,570 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 21:41:53,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:41:53,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:41:53,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:41:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:41:53,630 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:41:53,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-14 21:41:53,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623804434] [2019-10-14 21:41:53,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:41:53,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:41:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:41:53,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:41:53,632 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand 14 states. [2019-10-14 21:41:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:41:54,085 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2019-10-14 21:41:54,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:41:54,085 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-10-14 21:41:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:41:54,086 INFO L225 Difference]: With dead ends: 132 [2019-10-14 21:41:54,087 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:41:54,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:41:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:41:54,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2019-10-14 21:41:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:41:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2019-10-14 21:41:54,096 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 68 [2019-10-14 21:41:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:41:54,097 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2019-10-14 21:41:54,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 21:41:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2019-10-14 21:41:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 21:41:54,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:41:54,098 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:41:54,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:41:54,303 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:41:54,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:41:54,304 INFO L82 PathProgramCache]: Analyzing trace with hash 249886016, now seen corresponding path program 6 times [2019-10-14 21:41:54,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:41:54,305 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638293665] [2019-10-14 21:41:54,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:41:54,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:41:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:41:55,546 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-10-14 21:41:55,710 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2019-10-14 21:41:55,850 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2019-10-14 21:41:56,392 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-10-14 21:41:56,622 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-14 21:41:56,813 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2019-10-14 21:41:56,998 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-10-14 21:41:57,149 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 33 [2019-10-14 21:41:57,540 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2019-10-14 21:41:57,728 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-10-14 21:41:57,955 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-10-14 21:41:58,284 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-10-14 21:41:58,745 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2019-10-14 21:41:58,943 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2019-10-14 21:41:59,158 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-10-14 21:41:59,332 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-14 21:41:59,525 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-10-14 21:42:00,028 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2019-10-14 21:42:00,238 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2019-10-14 21:42:00,411 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2019-10-14 21:42:00,866 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2019-10-14 21:42:01,078 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2019-10-14 21:42:01,302 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2019-10-14 21:42:01,504 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2019-10-14 21:42:02,474 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-10-14 21:42:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:03,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638293665] [2019-10-14 21:42:03,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288920923] [2019-10-14 21:42:03,746 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:03,812 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:42:03,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:03,815 WARN L254 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 118 conjunts are in the unsatisfiable core [2019-10-14 21:42:03,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:10,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:11,124 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:11,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 123 [2019-10-14 21:42:11,125 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090071866] [2019-10-14 21:42:11,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-10-14 21:42:11,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:11,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-10-14 21:42:11,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1065, Invalid=13941, Unknown=0, NotChecked=0, Total=15006 [2019-10-14 21:42:11,130 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 123 states. [2019-10-14 21:42:12,565 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2019-10-14 21:42:12,951 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2019-10-14 21:42:13,354 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 59 [2019-10-14 21:42:13,687 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 84 [2019-10-14 21:42:14,149 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 75 [2019-10-14 21:42:14,513 WARN L191 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 96 [2019-10-14 21:42:16,141 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 52 [2019-10-14 21:42:16,882 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 72 [2019-10-14 21:42:17,482 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2019-10-14 21:42:17,781 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 64 [2019-10-14 21:42:18,168 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 58 [2019-10-14 21:42:19,473 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 82 [2019-10-14 21:42:20,306 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 89 [2019-10-14 21:42:21,487 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2019-10-14 21:42:23,292 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 46 [2019-10-14 21:42:23,717 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 43