/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/array-crafted/zero_sum_const_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:38:33,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:38:33,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:38:33,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 18:38:33,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:38:33,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:38:33,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:38:33,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:38:33,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:38:33,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:38:33,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:38:33,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:38:33,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:38:33,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:38:33,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:38:33,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:38:33,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:38:33,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:38:33,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:38:33,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:38:33,320 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 18:38:33,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:38:33,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:38:33,347 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:38:33,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:38:33,348 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:38:33,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:38:33,348 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:38:33,348 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:38:33,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:38:33,348 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:38:33,350 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:38:33,351 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:38:33,351 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:38:33,351 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:38:33,351 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:38:33,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:38:33,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:38:33,352 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:38:33,352 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:38:33,352 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:38:33,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:38:33,352 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:38:33,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:38:33,644 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:38:33,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:38:33,664 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:38:33,666 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:38:33,666 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:38:33,667 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-11-06 18:38:33,737 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d2204ae/2a4a7382314246eaae6b266ca845a8e9/FLAG8e288766c [2019-11-06 18:38:34,161 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:38:34,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m2.c [2019-11-06 18:38:34,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d2204ae/2a4a7382314246eaae6b266ca845a8e9/FLAG8e288766c [2019-11-06 18:38:34,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36d2204ae/2a4a7382314246eaae6b266ca845a8e9 [2019-11-06 18:38:34,611 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:38:34,612 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:38:34,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:34,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:38:34,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:38:34,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@202a7075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34, skipping insertion in model container [2019-11-06 18:38:34,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,629 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:38:34,646 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:38:34,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:34,824 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:38:34,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:38:34,870 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:38:34,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34 WrapperNode [2019-11-06 18:38:34,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:38:34,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:38:34,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:38:34,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:38:34,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:34,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:35,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (1/1) ... [2019-11-06 18:38:35,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:38:35,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:38:35,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:38:35,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:38:35,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (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 18:38:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:38:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:38:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:38:35,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:38:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:38:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:38:35,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:38:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 18:38:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:38:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:38:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:38:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:38:35,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:38:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:38:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:38:35,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:38:35,388 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:38:35,388 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-06 18:38:35,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:35 BoogieIcfgContainer [2019-11-06 18:38:35,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:38:35,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:38:35,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:38:35,393 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:38:35,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:38:34" (1/3) ... [2019-11-06 18:38:35,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712fd9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:35, skipping insertion in model container [2019-11-06 18:38:35,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:38:34" (2/3) ... [2019-11-06 18:38:35,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712fd9e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:38:35, skipping insertion in model container [2019-11-06 18:38:35,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:38:35" (3/3) ... [2019-11-06 18:38:35,398 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m2.c [2019-11-06 18:38:35,408 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:38:35,418 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:38:35,431 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:38:35,459 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:38:35,459 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:38:35,460 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:38:35,460 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:38:35,460 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:38:35,460 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:38:35,460 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:38:35,460 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:38:35,475 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-06 18:38:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:38:35,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:35,483 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:35,485 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash -720839896, now seen corresponding path program 1 times [2019-11-06 18:38:35,500 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:35,500 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170939203] [2019-11-06 18:38:35,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:35,682 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 18:38:35,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170939203] [2019-11-06 18:38:35,684 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:35,684 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:38:35,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798765876] [2019-11-06 18:38:35,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:38:35,690 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:35,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:38:35,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:38:35,707 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-06 18:38:35,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:35,831 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2019-11-06 18:38:35,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:38:35,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-06 18:38:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:35,845 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:38:35,845 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:38:35,855 INFO L630 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 [2019-11-06 18:38:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:38:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:38:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:38:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:38:35,899 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-11-06 18:38:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:35,900 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:38:35,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:38:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:38:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:38:35,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:35,904 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:35,904 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:35,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:35,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1191176598, now seen corresponding path program 1 times [2019-11-06 18:38:35,905 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:35,906 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026836097] [2019-11-06 18:38:35,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,087 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 18:38:36,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026836097] [2019-11-06 18:38:36,088 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:36,089 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:38:36,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564659051] [2019-11-06 18:38:36,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:38:36,091 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:38:36,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:38:36,092 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-06 18:38:36,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:36,249 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-11-06 18:38:36,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:36,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-06 18:38:36,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:36,252 INFO L225 Difference]: With dead ends: 38 [2019-11-06 18:38:36,252 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:38:36,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:38:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-06 18:38:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:38:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-06 18:38:36,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2019-11-06 18:38:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:36,271 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-06 18:38:36,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:38:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-06 18:38:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:38:36,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:36,274 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:36,275 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:36,276 INFO L82 PathProgramCache]: Analyzing trace with hash -988852588, now seen corresponding path program 1 times [2019-11-06 18:38:36,276 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:36,277 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79456777] [2019-11-06 18:38:36,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:38:36,368 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79456777] [2019-11-06 18:38:36,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:36,369 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:38:36,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954251031] [2019-11-06 18:38:36,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:38:36,370 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:36,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:38:36,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:38:36,371 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 4 states. [2019-11-06 18:38:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:36,462 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-11-06 18:38:36,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:38:36,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-11-06 18:38:36,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:36,465 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:38:36,465 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:38:36,466 INFO L630 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 [2019-11-06 18:38:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:38:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-06 18:38:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:38:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-06 18:38:36,474 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-11-06 18:38:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:36,474 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-06 18:38:36,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:38:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-06 18:38:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:38:36,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:36,476 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:36,476 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1991586542, now seen corresponding path program 1 times [2019-11-06 18:38:36,477 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:36,477 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837109163] [2019-11-06 18:38:36,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:38:36,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837109163] [2019-11-06 18:38:36,579 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:36,579 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:38:36,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193071096] [2019-11-06 18:38:36,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:38:36,580 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:36,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:38:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:38:36,581 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-11-06 18:38:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:36,719 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:38:36,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:36,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-06 18:38:36,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:36,720 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:38:36,720 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:38:36,721 INFO L630 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 [2019-11-06 18:38:36,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:38:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-06 18:38:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:38:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-11-06 18:38:36,733 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2019-11-06 18:38:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:36,733 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-11-06 18:38:36,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:38:36,735 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-11-06 18:38:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:38:36,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:36,736 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:36,737 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:36,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:36,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1169709580, now seen corresponding path program 1 times [2019-11-06 18:38:36,738 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:36,738 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384116426] [2019-11-06 18:38:36,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:36,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:38:36,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384116426] [2019-11-06 18:38:36,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435855465] [2019-11-06 18:38:36,853 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 18:38:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:36,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:36,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 18:38:36,988 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:36,988 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:38:36,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074297248] [2019-11-06 18:38:36,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:38:36,989 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:38:36,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:36,990 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 7 states. [2019-11-06 18:38:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:37,115 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2019-11-06 18:38:37,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:37,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-06 18:38:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:37,117 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:38:37,117 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:38:37,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:37,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:38:37,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-06 18:38:37,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:38:37,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:38:37,129 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2019-11-06 18:38:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:37,130 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:38:37,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:38:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:38:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:38:37,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:37,131 INFO L410 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] [2019-11-06 18:38:37,334 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:37,335 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:37,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1195670154, now seen corresponding path program 2 times [2019-11-06 18:38:37,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:37,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606030137] [2019-11-06 18:38:37,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:38:37,464 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606030137] [2019-11-06 18:38:37,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136270725] [2019-11-06 18:38:37,465 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:37,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:37,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:37,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:37,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:38:37,580 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:37,580 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:38:37,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522423161] [2019-11-06 18:38:37,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:38:37,581 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:38:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:37,586 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2019-11-06 18:38:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:37,766 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-11-06 18:38:37,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:38:37,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-11-06 18:38:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:37,768 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:38:37,768 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:38:37,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:38:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:38:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-11-06 18:38:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:38:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:38:37,786 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-11-06 18:38:37,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:37,789 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:38:37,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:38:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:38:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:38:37,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:37,791 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:38:37,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:38,000 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -187044094, now seen corresponding path program 3 times [2019-11-06 18:38:38,001 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:38,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136437518] [2019-11-06 18:38:38,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:39,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136437518] [2019-11-06 18:38:39,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131025774] [2019-11-06 18:38:39,393 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:39,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:38:39,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:39,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-06 18:38:39,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:39,581 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:38:39,581 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:39,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:39,593 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:39,593 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-06 18:38:41,804 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:41,814 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:41,814 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-11-06 18:38:41,815 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:41,842 INFO L567 ElimStorePlain]: treesize reduction 15, result has 71.7 percent of original size [2019-11-06 18:38:41,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:41,846 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:41,847 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:35 [2019-11-06 18:38:41,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:42,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:42,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:42,185 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:42,186 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 31] total 53 [2019-11-06 18:38:42,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86552437] [2019-11-06 18:38:42,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-06 18:38:42,187 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-06 18:38:42,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2019-11-06 18:38:42,189 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 53 states. [2019-11-06 18:38:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:45,457 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2019-11-06 18:38:45,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-06 18:38:45,457 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 40 [2019-11-06 18:38:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:45,459 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:38:45,459 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:38:45,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=305, Invalid=4525, Unknown=0, NotChecked=0, Total=4830 [2019-11-06 18:38:45,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:38:45,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 58. [2019-11-06 18:38:45,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-06 18:38:45,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-11-06 18:38:45,484 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2019-11-06 18:38:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:45,485 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-11-06 18:38:45,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-06 18:38:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-11-06 18:38:45,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:38:45,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:45,489 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-11-06 18:38:45,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:45,691 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:45,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:45,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1685956864, now seen corresponding path program 4 times [2019-11-06 18:38:45,691 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:45,692 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547763892] [2019-11-06 18:38:45,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:38:45,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547763892] [2019-11-06 18:38:45,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026899414] [2019-11-06 18:38:45,825 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:45,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:38:45,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:45,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:45,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:38:45,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:45,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:45,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524723069] [2019-11-06 18:38:45,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:45,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:45,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:45,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:45,946 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 14 states. [2019-11-06 18:38:46,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:46,269 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2019-11-06 18:38:46,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:38:46,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2019-11-06 18:38:46,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:46,274 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:38:46,274 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 18:38:46,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:38:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 18:38:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2019-11-06 18:38:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:38:46,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2019-11-06 18:38:46,286 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 42 [2019-11-06 18:38:46,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:46,286 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2019-11-06 18:38:46,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:46,286 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2019-11-06 18:38:46,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:38:46,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:46,287 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:46,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:46,492 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:46,492 INFO L82 PathProgramCache]: Analyzing trace with hash 19991870, now seen corresponding path program 5 times [2019-11-06 18:38:46,492 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:46,493 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645315018] [2019-11-06 18:38:46,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-06 18:38:46,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645315018] [2019-11-06 18:38:46,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158631382] [2019-11-06 18:38:46,586 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:46,665 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:38:46,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:46,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:46,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-06 18:38:46,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:46,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:46,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565928914] [2019-11-06 18:38:46,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:46,748 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:46,749 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2019-11-06 18:38:47,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:47,047 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2019-11-06 18:38:47,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:38:47,048 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2019-11-06 18:38:47,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:47,049 INFO L225 Difference]: With dead ends: 72 [2019-11-06 18:38:47,050 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:38:47,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:38:47,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:38:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-11-06 18:38:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:38:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:38:47,058 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2019-11-06 18:38:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:47,059 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:38:47,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:38:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:38:47,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:47,060 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:38:47,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:47,263 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1936263288, now seen corresponding path program 6 times [2019-11-06 18:38:47,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:47,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982932438] [2019-11-06 18:38:47,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:48,404 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-11-06 18:38:48,562 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-11-06 18:38:49,112 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-11-06 18:38:49,259 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2019-11-06 18:38:49,561 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2019-11-06 18:38:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:51,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982932438] [2019-11-06 18:38:51,650 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786078831] [2019-11-06 18:38:51,650 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:51,706 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:38:51,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:51,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 70 conjunts are in the unsatisfiable core [2019-11-06 18:38:51,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:51,826 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:38:51,826 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:51,833 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:51,833 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:51,833 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-06 18:38:54,302 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:54,305 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:54,306 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 18:38:54,329 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:54,330 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 59 [2019-11-06 18:38:54,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,351 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-06 18:38:54,385 INFO L567 ElimStorePlain]: treesize reduction 46, result has 37.0 percent of original size [2019-11-06 18:38:54,386 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 18:38:54,387 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:22 [2019-11-06 18:38:54,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:54,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:54,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 36] total 77 [2019-11-06 18:38:54,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055217560] [2019-11-06 18:38:54,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-11-06 18:38:54,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:54,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-11-06 18:38:54,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=5281, Unknown=0, NotChecked=0, Total=5852 [2019-11-06 18:38:54,745 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 77 states. [2019-11-06 18:38:58,115 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 32 [2019-11-06 18:38:58,361 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2019-11-06 18:38:59,174 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2019-11-06 18:38:59,572 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2019-11-06 18:39:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:04,856 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2019-11-06 18:39:04,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-06 18:39:04,857 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 50 [2019-11-06 18:39:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:04,859 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:39:04,859 INFO L226 Difference]: Without dead ends: 100 [2019-11-06 18:39:04,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5250 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1564, Invalid=14186, Unknown=0, NotChecked=0, Total=15750 [2019-11-06 18:39:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-06 18:39:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2019-11-06 18:39:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-06 18:39:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2019-11-06 18:39:04,883 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 50 [2019-11-06 18:39:04,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:04,884 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2019-11-06 18:39:04,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-11-06 18:39:04,884 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2019-11-06 18:39:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:39:04,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:04,889 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2019-11-06 18:39:05,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:05,090 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:05,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash 155810740, now seen corresponding path program 7 times [2019-11-06 18:39:05,091 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:05,091 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991938925] [2019-11-06 18:39:05,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:39:05,194 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991938925] [2019-11-06 18:39:05,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214237736] [2019-11-06 18:39:05,195 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:05,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:39:05,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:05,381 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 18:39:05,382 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:05,382 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-11-06 18:39:05,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511661749] [2019-11-06 18:39:05,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:39:05,384 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:05,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:39:05,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:39:05,384 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 17 states. [2019-11-06 18:39:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:06,071 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2019-11-06 18:39:06,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:39:06,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 54 [2019-11-06 18:39:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:06,073 INFO L225 Difference]: With dead ends: 151 [2019-11-06 18:39:06,073 INFO L226 Difference]: Without dead ends: 105 [2019-11-06 18:39:06,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:39:06,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-06 18:39:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2019-11-06 18:39:06,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:39:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2019-11-06 18:39:06,087 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 54 [2019-11-06 18:39:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:06,087 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2019-11-06 18:39:06,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:39:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2019-11-06 18:39:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:39:06,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:06,089 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 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] [2019-11-06 18:39:06,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:06,293 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2146716148, now seen corresponding path program 8 times [2019-11-06 18:39:06,294 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:06,294 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603810632] [2019-11-06 18:39:06,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-06 18:39:06,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603810632] [2019-11-06 18:39:06,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442019500] [2019-11-06 18:39:06,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:06,476 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:39:06,476 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:06,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:39:06,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-06 18:39:06,544 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:39:06,544 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2019-11-06 18:39:06,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404535749] [2019-11-06 18:39:06,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:39:06,545 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:39:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:39:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:39:06,545 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 18 states. [2019-11-06 18:39:06,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:39:06,929 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2019-11-06 18:39:06,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:39:06,929 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 54 [2019-11-06 18:39:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:39:06,930 INFO L225 Difference]: With dead ends: 137 [2019-11-06 18:39:06,931 INFO L226 Difference]: Without dead ends: 66 [2019-11-06 18:39:06,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:39:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-06 18:39:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2019-11-06 18:39:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:39:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:39:06,940 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2019-11-06 18:39:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:39:06,941 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:39:06,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:39:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:39:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-06 18:39:06,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:39:06,942 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:39:07,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:07,151 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:39:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:39:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1133377938, now seen corresponding path program 9 times [2019-11-06 18:39:07,152 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:39:07,152 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551626485] [2019-11-06 18:39:07,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:39:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:08,414 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2019-11-06 18:39:08,566 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-06 18:39:08,724 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-06 18:39:08,916 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-06 18:39:09,064 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2019-11-06 18:39:09,474 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2019-11-06 18:39:09,694 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2019-11-06 18:39:09,889 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-06 18:39:10,091 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-11-06 18:39:10,304 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2019-11-06 18:39:10,523 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-11-06 18:39:10,716 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-11-06 18:39:10,904 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-11-06 18:39:11,064 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2019-11-06 18:39:11,368 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-11-06 18:39:11,537 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-06 18:39:11,707 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2019-11-06 18:39:11,888 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-06 18:39:12,098 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-06 18:39:12,297 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2019-11-06 18:39:12,513 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-11-06 18:39:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:39:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:39:13,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551626485] [2019-11-06 18:39:13,870 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618558675] [2019-11-06 18:39:13,870 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:39:13,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-06 18:39:13,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:39:13,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-06 18:39:13,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:39:13,983 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-06 18:39:13,984 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:39:13,991 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:39:13,991 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:39:13,992 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21