/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_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:37:56,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:37:56,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:37:56,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:37:56,616 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:37:56,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:37:56,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:37:56,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:37:56,622 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:37:56,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:37:56,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:37:56,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:37:56,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:37:56,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:37:56,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:37:56,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:37:56,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:37:56,629 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:37:56,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:37:56,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:37:56,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:37:56,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:37:56,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:37:56,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:37:56,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:37:56,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:37:56,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:37:56,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:37:56,661 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 18:37:56,682 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:37:56,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:37:56,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:37:56,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:37:56,687 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:37:56,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:37:56,687 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:37:56,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:37:56,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:37:56,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:37:56,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:37:56,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:37:56,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:37:56,690 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:37:56,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:37:56,690 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:37:56,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:37:56,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:37:56,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:37:56,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:37:56,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:37:56,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:37:56,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:37:56,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:37:56,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:37:56,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:37:56,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:37:56,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:37:56,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:37:56,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:37:56,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:37:56,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:37:56,982 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:37:56,982 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:37:56,983 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2019-11-06 18:37:57,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c0c88eb/2f6bb10258f14f9a842d88bf8bb65c2e/FLAG7a57b2edd [2019-11-06 18:37:57,475 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:37:57,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2019-11-06 18:37:57,482 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c0c88eb/2f6bb10258f14f9a842d88bf8bb65c2e/FLAG7a57b2edd [2019-11-06 18:37:57,851 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93c0c88eb/2f6bb10258f14f9a842d88bf8bb65c2e [2019-11-06 18:37:57,861 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:37:57,863 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:37:57,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:57,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:37:57,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:37:57,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:57" (1/1) ... [2019-11-06 18:37:57,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54935a67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:57, skipping insertion in model container [2019-11-06 18:37:57,872 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:57" (1/1) ... [2019-11-06 18:37:57,879 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:37:57,904 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:37:58,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:58,197 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:37:58,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:58,257 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:37:58,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58 WrapperNode [2019-11-06 18:37:58,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:58,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:37:58,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:37:58,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:37:58,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (1/1) ... [2019-11-06 18:37:58,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:37:58,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:37:58,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:37:58,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:37:58,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (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 18:37:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:37:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:37:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:37:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:37:58,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 18:37:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:37:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:37:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:37:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:37:58,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:37:58,795 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:37:58,796 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-06 18:37:58,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:58 BoogieIcfgContainer [2019-11-06 18:37:58,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:37:58,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:37:58,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:37:58,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:37:58,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:37:57" (1/3) ... [2019-11-06 18:37:58,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eea070a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:58, skipping insertion in model container [2019-11-06 18:37:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:58" (2/3) ... [2019-11-06 18:37:58,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eea070a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:58, skipping insertion in model container [2019-11-06 18:37:58,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:58" (3/3) ... [2019-11-06 18:37:58,807 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2019-11-06 18:37:58,821 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:37:58,831 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:37:58,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:37:58,871 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:37:58,871 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:37:58,871 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:37:58,871 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:37:58,872 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:37:58,872 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:37:58,872 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:37:58,872 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:37:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-06 18:37:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:37:58,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:58,913 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 18:37:58,916 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash -340082088, now seen corresponding path program 1 times [2019-11-06 18:37:58,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:58,932 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359954117] [2019-11-06 18:37:58,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:59,135 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 18:37:59,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359954117] [2019-11-06 18:37:59,137 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:59,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:37:59,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441046119] [2019-11-06 18:37:59,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:59,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:59,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:59,161 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-06 18:37:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:59,301 INFO L93 Difference]: Finished difference Result 69 states and 97 transitions. [2019-11-06 18:37:59,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:59,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-06 18:37:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:59,313 INFO L225 Difference]: With dead ends: 69 [2019-11-06 18:37:59,313 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:37:59,317 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 18:37:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:37:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 18:37:59,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:37:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-06 18:37:59,374 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2019-11-06 18:37:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:59,374 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-06 18:37:59,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-06 18:37:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:37:59,377 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:59,377 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 18:37:59,377 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:59,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1435036102, now seen corresponding path program 1 times [2019-11-06 18:37:59,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:59,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267188651] [2019-11-06 18:37:59,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:59,516 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 18:37:59,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267188651] [2019-11-06 18:37:59,517 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:59,517 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:37:59,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580240746] [2019-11-06 18:37:59,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:37:59,520 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:59,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:37:59,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:59,523 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-11-06 18:37:59,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:59,717 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-06 18:37:59,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:37:59,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-06 18:37:59,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:59,720 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:37:59,720 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:37:59,721 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 18:37:59,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:37:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 18:37:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:37:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-11-06 18:37:59,733 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 24 [2019-11-06 18:37:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:59,734 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-11-06 18:37:59,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:37:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-11-06 18:37:59,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:37:59,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:59,738 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] [2019-11-06 18:37:59,739 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1431897668, now seen corresponding path program 1 times [2019-11-06 18:37:59,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:59,741 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930173488] [2019-11-06 18:37:59,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:59,863 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 18:37:59,864 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930173488] [2019-11-06 18:37:59,864 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:59,864 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:37:59,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781549428] [2019-11-06 18:37:59,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:37:59,865 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:59,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:37:59,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:37:59,866 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 4 states. [2019-11-06 18:37:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:59,987 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-11-06 18:37:59,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:37:59,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-06 18:37:59,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:59,989 INFO L225 Difference]: With dead ends: 79 [2019-11-06 18:37:59,989 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:37:59,990 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 18:37:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:37:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-06 18:37:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:37:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-11-06 18:37:59,998 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2019-11-06 18:37:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:59,998 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-06 18:37:59,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:37:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2019-11-06 18:37:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:38:00,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:00,000 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] [2019-11-06 18:38:00,000 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:00,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:00,000 INFO L82 PathProgramCache]: Analyzing trace with hash -820794174, now seen corresponding path program 1 times [2019-11-06 18:38:00,001 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:00,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037237442] [2019-11-06 18:38:00,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,090 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 18:38:00,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037237442] [2019-11-06 18:38:00,091 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:38:00,091 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 18:38:00,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821610747] [2019-11-06 18:38:00,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:38:00,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:00,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:38:00,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:38:00,096 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2019-11-06 18:38:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:00,254 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2019-11-06 18:38:00,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:00,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-11-06 18:38:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:00,257 INFO L225 Difference]: With dead ends: 75 [2019-11-06 18:38:00,258 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:38:00,258 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 18:38:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:38:00,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2019-11-06 18:38:00,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:38:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-11-06 18:38:00,269 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2019-11-06 18:38:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:00,269 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-11-06 18:38:00,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:38:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-11-06 18:38:00,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:38:00,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:00,273 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:00,273 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:00,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:00,273 INFO L82 PathProgramCache]: Analyzing trace with hash -304137992, now seen corresponding path program 1 times [2019-11-06 18:38:00,274 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:00,274 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249520330] [2019-11-06 18:38:00,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:38:00,388 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249520330] [2019-11-06 18:38:00,388 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102607887] [2019-11-06 18:38:00,388 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 18:38:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:00,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:38:00,512 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:00,512 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:38:00,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460161669] [2019-11-06 18:38:00,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:38:00,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:00,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:38:00,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:38:00,514 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 7 states. [2019-11-06 18:38:00,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:00,660 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:38:00,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:38:00,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-11-06 18:38:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:00,662 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:38:00,662 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:38:00,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 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 18:38:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:38:00,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:38:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:38:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-06 18:38:00,669 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2019-11-06 18:38:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:00,670 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-06 18:38:00,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:38:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-06 18:38:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:38:00,671 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:00,671 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:00,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:00,876 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:00,876 INFO L82 PathProgramCache]: Analyzing trace with hash -78769546, now seen corresponding path program 2 times [2019-11-06 18:38:00,876 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:00,877 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711384956] [2019-11-06 18:38:00,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:38:00,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711384956] [2019-11-06 18:38:00,982 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164884971] [2019-11-06 18:38:00,982 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 18:38:01,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:01,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:01,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:38:01,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 18:38:01,095 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:01,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-11-06 18:38:01,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245227114] [2019-11-06 18:38:01,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:38:01,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:01,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:38:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:38:01,101 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2019-11-06 18:38:01,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:01,305 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2019-11-06 18:38:01,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:38:01,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-06 18:38:01,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:01,306 INFO L225 Difference]: With dead ends: 85 [2019-11-06 18:38:01,306 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:38:01,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 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 18:38:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:38:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2019-11-06 18:38:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:38:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-11-06 18:38:01,314 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 40 [2019-11-06 18:38:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:01,314 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-11-06 18:38:01,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:38:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-11-06 18:38:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:38:01,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:01,316 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:01,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:01,524 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash 805210282, now seen corresponding path program 3 times [2019-11-06 18:38:01,525 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:01,526 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104741793] [2019-11-06 18:38:01,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:02,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104741793] [2019-11-06 18:38:02,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276438315] [2019-11-06 18:38:02,696 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 18:38:02,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:38:02,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:02,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 72 conjunts are in the unsatisfiable core [2019-11-06 18:38:02,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:02,884 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 18:38:02,884 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:02,897 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:02,898 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:38:02,899 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-06 18:38:04,346 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 18:38:04,357 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:38:04,358 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 18:38:04,359 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:38:04,390 INFO L567 ElimStorePlain]: treesize reduction 16, result has 70.9 percent of original size [2019-11-06 18:38:04,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:04,395 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 18:38:04,396 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:36 [2019-11-06 18:38:04,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:04,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:04,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:04,643 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:04,644 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 40 [2019-11-06 18:38:04,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936156697] [2019-11-06 18:38:04,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:38:04,645 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:04,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:38:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:38:04,647 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 40 states. [2019-11-06 18:38:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:07,363 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2019-11-06 18:38:07,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:38:07,364 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2019-11-06 18:38:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:07,365 INFO L225 Difference]: With dead ends: 136 [2019-11-06 18:38:07,365 INFO L226 Difference]: Without dead ends: 130 [2019-11-06 18:38:07,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 22 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2019-11-06 18:38:07,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-06 18:38:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2019-11-06 18:38:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:38:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2019-11-06 18:38:07,401 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2019-11-06 18:38:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:07,403 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2019-11-06 18:38:07,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:38:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2019-11-06 18:38:07,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-06 18:38:07,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:07,407 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:07,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:07,610 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1759673384, now seen corresponding path program 4 times [2019-11-06 18:38:07,611 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:07,611 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497677052] [2019-11-06 18:38:07,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:38:07,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497677052] [2019-11-06 18:38:07,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881361927] [2019-11-06 18:38:07,718 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 18:38:07,766 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:38:07,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:07,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:07,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:07,832 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-06 18:38:07,833 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:07,833 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:07,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544402770] [2019-11-06 18:38:07,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:07,834 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:07,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:07,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:07,835 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 14 states. [2019-11-06 18:38:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:08,263 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2019-11-06 18:38:08,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:38:08,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-06 18:38:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:08,266 INFO L225 Difference]: With dead ends: 181 [2019-11-06 18:38:08,266 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:38:08,267 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 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 18:38:08,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:38:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2019-11-06 18:38:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:38:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2019-11-06 18:38:08,280 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 54 [2019-11-06 18:38:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:08,280 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2019-11-06 18:38:08,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2019-11-06 18:38:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:38:08,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:08,282 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:08,487 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:08,487 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 41163494, now seen corresponding path program 5 times [2019-11-06 18:38:08,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:08,489 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805880171] [2019-11-06 18:38:08,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:38:08,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805880171] [2019-11-06 18:38:08,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337546245] [2019-11-06 18:38:08,600 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 18:38:08,730 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:38:08,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:08,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:38:08,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 18:38:08,809 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:08,809 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-11-06 18:38:08,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721645371] [2019-11-06 18:38:08,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:38:08,810 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:08,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:38:08,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:38:08,810 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 14 states. [2019-11-06 18:38:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:09,196 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2019-11-06 18:38:09,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:38:09,197 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2019-11-06 18:38:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:09,197 INFO L225 Difference]: With dead ends: 102 [2019-11-06 18:38:09,198 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:38:09,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:38:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:38:09,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2019-11-06 18:38:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:38:09,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2019-11-06 18:38:09,207 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2019-11-06 18:38:09,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:09,207 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2019-11-06 18:38:09,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:38:09,208 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2019-11-06 18:38:09,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:38:09,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:09,209 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:09,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:09,410 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:09,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:09,410 INFO L82 PathProgramCache]: Analyzing trace with hash 351008988, now seen corresponding path program 6 times [2019-11-06 18:38:09,411 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:09,411 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982422967] [2019-11-06 18:38:09,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:10,577 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-11-06 18:38:10,735 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2019-11-06 18:38:11,580 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-11-06 18:38:11,789 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-06 18:38:11,949 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2019-11-06 18:38:12,198 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-11-06 18:38:12,490 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2019-11-06 18:38:12,848 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-11-06 18:38:13,026 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-11-06 18:38:13,611 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2019-11-06 18:38:13,820 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2019-11-06 18:38:14,020 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-11-06 18:38:14,222 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2019-11-06 18:38:14,427 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-11-06 18:38:15,050 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2019-11-06 18:38:15,294 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2019-11-06 18:38:15,487 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2019-11-06 18:38:15,699 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-11-06 18:38:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:16,802 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982422967] [2019-11-06 18:38:16,802 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190428781] [2019-11-06 18:38:16,802 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 18:38:16,863 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:38:16,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:16,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2019-11-06 18:38:16,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:19,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 18:38:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:38:19,501 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:19,501 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 41] total 93 [2019-11-06 18:38:19,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825350796] [2019-11-06 18:38:19,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-11-06 18:38:19,502 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:19,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-11-06 18:38:19,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=7888, Unknown=0, NotChecked=0, Total=8556 [2019-11-06 18:38:19,507 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 93 states. [2019-11-06 18:38:21,028 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2019-11-06 18:38:21,790 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2019-11-06 18:38:22,347 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2019-11-06 18:38:22,591 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 39 [2019-11-06 18:38:23,026 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 35 [2019-11-06 18:38:23,404 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2019-11-06 18:38:23,622 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 37 [2019-11-06 18:38:25,590 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 33 [2019-11-06 18:38:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:27,386 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2019-11-06 18:38:27,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:38:27,391 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 66 [2019-11-06 18:38:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:27,392 INFO L225 Difference]: With dead ends: 178 [2019-11-06 18:38:27,392 INFO L226 Difference]: Without dead ends: 122 [2019-11-06 18:38:27,396 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 10 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6044 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1349, Invalid=14401, Unknown=0, NotChecked=0, Total=15750 [2019-11-06 18:38:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-06 18:38:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2019-11-06 18:38:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-06 18:38:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2019-11-06 18:38:27,409 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 66 [2019-11-06 18:38:27,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:27,409 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2019-11-06 18:38:27,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-11-06 18:38:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2019-11-06 18:38:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-06 18:38:27,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:27,411 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:27,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:27,615 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -2004622824, now seen corresponding path program 7 times [2019-11-06 18:38:27,616 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:27,616 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096660184] [2019-11-06 18:38:27,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 18:38:27,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096660184] [2019-11-06 18:38:27,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992666769] [2019-11-06 18:38:27,729 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 18:38:27,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:27,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:38:27,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 18:38:27,923 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:27,923 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-11-06 18:38:27,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813685730] [2019-11-06 18:38:27,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:38:27,925 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:38:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:38:27,926 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand 17 states. [2019-11-06 18:38:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:28,779 INFO L93 Difference]: Finished difference Result 199 states and 218 transitions. [2019-11-06 18:38:28,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:38:28,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2019-11-06 18:38:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:28,781 INFO L225 Difference]: With dead ends: 199 [2019-11-06 18:38:28,781 INFO L226 Difference]: Without dead ends: 133 [2019-11-06 18:38:28,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 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 18:38:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-06 18:38:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 116. [2019-11-06 18:38:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-06 18:38:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2019-11-06 18:38:28,794 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 70 [2019-11-06 18:38:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:28,794 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2019-11-06 18:38:28,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:38:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2019-11-06 18:38:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 18:38:28,796 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:28,796 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:38:28,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:29,000 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1766653994, now seen corresponding path program 8 times [2019-11-06 18:38:29,001 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:29,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104515950] [2019-11-06 18:38:29,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 18:38:29,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104515950] [2019-11-06 18:38:29,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358500121] [2019-11-06 18:38:29,146 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 18:38:29,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:38:29,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:38:29,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:38:29,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:38:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-06 18:38:29,298 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:38:29,298 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2019-11-06 18:38:29,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495766691] [2019-11-06 18:38:29,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:38:29,299 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:38:29,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:38:29,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:38:29,300 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand 18 states. [2019-11-06 18:38:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:38:29,765 INFO L93 Difference]: Finished difference Result 187 states and 201 transitions. [2019-11-06 18:38:29,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:38:29,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 72 [2019-11-06 18:38:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:38:29,768 INFO L225 Difference]: With dead ends: 187 [2019-11-06 18:38:29,768 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:38:29,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:38:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:38:29,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2019-11-06 18:38:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 18:38:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2019-11-06 18:38:29,778 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 72 [2019-11-06 18:38:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:38:29,778 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2019-11-06 18:38:29,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:38:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2019-11-06 18:38:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-06 18:38:29,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:38:29,780 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1] [2019-11-06 18:38:29,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:38:29,986 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:38:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:38:29,987 INFO L82 PathProgramCache]: Analyzing trace with hash -365647474, now seen corresponding path program 9 times [2019-11-06 18:38:29,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:38:29,987 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446705378] [2019-11-06 18:38:29,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:38:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:38:31,341 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 37 [2019-11-06 18:38:31,466 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 38 [2019-11-06 18:38:31,609 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2019-11-06 18:38:31,766 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2019-11-06 18:38:32,236 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2019-11-06 18:38:32,515 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2019-11-06 18:38:32,689 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-11-06 18:38:32,999 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2019-11-06 18:38:33,213 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2019-11-06 18:38:33,380 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-11-06 18:38:33,549 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2019-11-06 18:38:33,795 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2019-11-06 18:38:34,059 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2019-11-06 18:38:34,317 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2019-11-06 18:38:34,613 WARN L191 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2019-11-06 18:38:34,829 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2019-11-06 18:38:35,022 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2019-11-06 18:38:35,260 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2019-11-06 18:38:35,462 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2019-11-06 18:38:35,692 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-11-06 18:38:35,930 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-11-06 18:38:36,180 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2019-11-06 18:38:36,433 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2019-11-06 18:38:36,677 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-11-06 18:38:36,924 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2019-11-06 18:38:37,140 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-11-06 18:38:37,363 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-11-06 18:38:37,618 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2019-11-06 18:38:37,866 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2019-11-06 18:38:38,091 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-11-06 18:38:38,311 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-06 18:38:38,550 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2019-11-06 18:38:38,788 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2019-11-06 18:38:39,031 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2019-11-06 18:38:39,281 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2019-11-06 18:38:39,499 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-11-06 18:38:39,681 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2019-11-06 18:38:39,877 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2019-11-06 18:38:40,073 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2019-11-06 18:38:40,267 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2019-11-06 18:38:40,484 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2019-11-06 18:38:40,691 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2019-11-06 18:38:40,897 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2019-11-06 18:38:41,095 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52