/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/eca-rers2012/Problem11_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:09:54,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:09:54,132 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:09:54,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:09:54,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:09:54,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:09:54,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:09:54,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:09:54,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:09:54,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:09:54,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:09:54,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:09:54,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:09:54,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:09:54,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:09:54,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:09:54,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:09:54,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:09:54,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:09:54,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:09:54,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:09:54,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:09:54,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:09:54,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:09:54,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:09:54,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:09:54,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:09:54,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:09:54,220 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 19:09:54,252 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:09:54,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:09:54,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:09:54,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:09:54,254 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:09:54,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:09:54,254 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:09:54,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:09:54,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:09:54,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:09:54,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:09:54,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:09:54,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:09:54,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:09:54,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:09:54,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:09:54,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:09:54,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:09:54,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:09:54,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:09:54,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:09:54,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:09:54,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:09:54,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:09:54,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:09:54,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:09:54,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:09:54,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:09:54,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:09:54,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:09:54,606 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:09:54,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:09:54,613 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:09:54,613 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:09:54,614 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-11-06 19:09:54,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a3e74af9/ab4c7190b79042bc9926ea4b004a4c45/FLAGa6b3f167e [2019-11-06 19:09:55,292 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:09:55,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-11-06 19:09:55,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a3e74af9/ab4c7190b79042bc9926ea4b004a4c45/FLAGa6b3f167e [2019-11-06 19:09:55,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a3e74af9/ab4c7190b79042bc9926ea4b004a4c45 [2019-11-06 19:09:55,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:09:55,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:09:55,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:55,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:09:55,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:09:55,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:55" (1/1) ... [2019-11-06 19:09:55,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c96835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:55, skipping insertion in model container [2019-11-06 19:09:55,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:09:55" (1/1) ... [2019-11-06 19:09:55,536 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:09:55,603 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:09:56,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:56,299 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:09:56,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:09:56,528 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:09:56,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56 WrapperNode [2019-11-06 19:09:56,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:09:56,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:09:56,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:09:56,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:09:56,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (1/1) ... [2019-11-06 19:09:56,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:09:56,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:09:56,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:09:56,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:09:56,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (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 19:09:56,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:09:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:09:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:09:56,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:09:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:09:56,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:09:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:09:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:09:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:09:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:09:56,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:09:58,691 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:09:58,692 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:09:58,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:58 BoogieIcfgContainer [2019-11-06 19:09:58,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:09:58,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:09:58,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:09:58,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:09:58,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:09:55" (1/3) ... [2019-11-06 19:09:58,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec34788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:58, skipping insertion in model container [2019-11-06 19:09:58,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:09:56" (2/3) ... [2019-11-06 19:09:58,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec34788 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:09:58, skipping insertion in model container [2019-11-06 19:09:58,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:09:58" (3/3) ... [2019-11-06 19:09:58,714 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label47.c [2019-11-06 19:09:58,729 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:09:58,740 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:09:58,753 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:09:58,802 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:09:58,802 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:09:58,804 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:09:58,804 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:09:58,804 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:09:58,804 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:09:58,804 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:09:58,805 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:09:58,843 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:09:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 19:09:58,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:58,854 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, 1, 1, 1] [2019-11-06 19:09:58,856 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1102823458, now seen corresponding path program 1 times [2019-11-06 19:09:58,873 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:58,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12952203] [2019-11-06 19:09:58,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:59,368 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 19:09:59,369 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12952203] [2019-11-06 19:09:59,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:59,370 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:09:59,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623194903] [2019-11-06 19:09:59,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:09:59,378 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:09:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:09:59,396 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:10:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:02,621 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2019-11-06 19:10:02,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:10:02,623 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-06 19:10:02,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:02,647 INFO L225 Difference]: With dead ends: 1004 [2019-11-06 19:10:02,647 INFO L226 Difference]: Without dead ends: 644 [2019-11-06 19:10:02,657 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-11-06 19:10:02,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623. [2019-11-06 19:10:02,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 19:10:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions. [2019-11-06 19:10:02,787 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 41 [2019-11-06 19:10:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:02,787 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 957 transitions. [2019-11-06 19:10:02,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions. [2019-11-06 19:10:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 19:10:02,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:02,794 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:02,794 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:02,795 INFO L82 PathProgramCache]: Analyzing trace with hash -659313835, now seen corresponding path program 1 times [2019-11-06 19:10:02,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:02,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114822199] [2019-11-06 19:10:02,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:03,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114822199] [2019-11-06 19:10:03,093 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:03,093 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:10:03,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944200297] [2019-11-06 19:10:03,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:10:03,099 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:03,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:10:03,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:03,099 INFO L87 Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states. [2019-11-06 19:10:05,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:05,554 INFO L93 Difference]: Finished difference Result 1867 states and 2956 transitions. [2019-11-06 19:10:05,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:10:05,555 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-11-06 19:10:05,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:05,569 INFO L225 Difference]: With dead ends: 1867 [2019-11-06 19:10:05,569 INFO L226 Difference]: Without dead ends: 1250 [2019-11-06 19:10:05,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:10:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-11-06 19:10:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020. [2019-11-06 19:10:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-11-06 19:10:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions. [2019-11-06 19:10:05,655 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 116 [2019-11-06 19:10:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:05,658 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions. [2019-11-06 19:10:05,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:10:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions. [2019-11-06 19:10:05,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 19:10:05,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:05,674 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:05,674 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:05,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash -739175262, now seen corresponding path program 1 times [2019-11-06 19:10:05,675 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:05,675 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079316571] [2019-11-06 19:10:05,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:06,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079316571] [2019-11-06 19:10:06,034 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:06,034 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:10:06,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959367279] [2019-11-06 19:10:06,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:10:06,037 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:06,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:10:06,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:10:06,039 INFO L87 Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states. [2019-11-06 19:10:08,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:08,906 INFO L93 Difference]: Finished difference Result 3063 states and 4491 transitions. [2019-11-06 19:10:08,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:10:08,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2019-11-06 19:10:08,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:08,916 INFO L225 Difference]: With dead ends: 3063 [2019-11-06 19:10:08,916 INFO L226 Difference]: Without dead ends: 2049 [2019-11-06 19:10:08,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:10:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2019-11-06 19:10:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822. [2019-11-06 19:10:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-11-06 19:10:08,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions. [2019-11-06 19:10:08,991 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 129 [2019-11-06 19:10:08,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:08,992 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions. [2019-11-06 19:10:08,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:10:08,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions. [2019-11-06 19:10:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-06 19:10:08,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:08,996 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:08,996 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1324114650, now seen corresponding path program 1 times [2019-11-06 19:10:08,997 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:08,997 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512799717] [2019-11-06 19:10:08,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:09,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512799717] [2019-11-06 19:10:09,250 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678861572] [2019-11-06 19:10:09,250 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 19:10:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:09,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:09,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:09,449 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:09,449 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 19:10:09,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588861616] [2019-11-06 19:10:09,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:09,451 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:09,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:09,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:09,451 INFO L87 Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states. [2019-11-06 19:10:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:10,565 INFO L93 Difference]: Finished difference Result 4442 states and 6217 transitions. [2019-11-06 19:10:10,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:10,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-11-06 19:10:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:10,579 INFO L225 Difference]: With dead ends: 4442 [2019-11-06 19:10:10,580 INFO L226 Difference]: Without dead ends: 2814 [2019-11-06 19:10:10,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:10,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2019-11-06 19:10:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809. [2019-11-06 19:10:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2809 states. [2019-11-06 19:10:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions. [2019-11-06 19:10:10,658 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 172 [2019-11-06 19:10:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:10,659 INFO L462 AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions. [2019-11-06 19:10:10,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions. [2019-11-06 19:10:10,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-06 19:10:10,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:10,664 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:10,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:10,877 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:10,877 INFO L82 PathProgramCache]: Analyzing trace with hash 951446006, now seen corresponding path program 1 times [2019-11-06 19:10:10,877 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:10,878 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834320573] [2019-11-06 19:10:10,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:11,228 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834320573] [2019-11-06 19:10:11,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450957821] [2019-11-06 19:10:11,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:11,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:11,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:10:11,393 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:11,393 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:10:11,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384473526] [2019-11-06 19:10:11,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:11,395 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:10:11,395 INFO L87 Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 3 states. [2019-11-06 19:10:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:12,736 INFO L93 Difference]: Finished difference Result 7338 states and 10305 transitions. [2019-11-06 19:10:12,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:12,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2019-11-06 19:10:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:12,766 INFO L225 Difference]: With dead ends: 7338 [2019-11-06 19:10:12,766 INFO L226 Difference]: Without dead ends: 4723 [2019-11-06 19:10:12,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:10:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2019-11-06 19:10:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4721. [2019-11-06 19:10:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4721 states. [2019-11-06 19:10:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6255 transitions. [2019-11-06 19:10:12,900 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6255 transitions. Word has length 197 [2019-11-06 19:10:12,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:12,902 INFO L462 AbstractCegarLoop]: Abstraction has 4721 states and 6255 transitions. [2019-11-06 19:10:12,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:12,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6255 transitions. [2019-11-06 19:10:12,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 19:10:12,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:12,907 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:13,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:13,111 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash -163070871, now seen corresponding path program 1 times [2019-11-06 19:10:13,112 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:13,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740473960] [2019-11-06 19:10:13,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:10:13,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740473960] [2019-11-06 19:10:13,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726423735] [2019-11-06 19:10:13,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:13,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:13,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:10:13,599 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:13,599 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:10:13,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812020898] [2019-11-06 19:10:13,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:13,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:13,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:10:13,604 INFO L87 Difference]: Start difference. First operand 4721 states and 6255 transitions. Second operand 3 states. [2019-11-06 19:10:14,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:14,704 INFO L93 Difference]: Finished difference Result 11737 states and 16265 transitions. [2019-11-06 19:10:14,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:14,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-11-06 19:10:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:14,736 INFO L225 Difference]: With dead ends: 11737 [2019-11-06 19:10:14,737 INFO L226 Difference]: Without dead ends: 7210 [2019-11-06 19:10:14,750 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:10:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2019-11-06 19:10:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 6454. [2019-11-06 19:10:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6454 states. [2019-11-06 19:10:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6454 states to 6454 states and 8601 transitions. [2019-11-06 19:10:14,914 INFO L78 Accepts]: Start accepts. Automaton has 6454 states and 8601 transitions. Word has length 202 [2019-11-06 19:10:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:14,914 INFO L462 AbstractCegarLoop]: Abstraction has 6454 states and 8601 transitions. [2019-11-06 19:10:14,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 6454 states and 8601 transitions. [2019-11-06 19:10:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:10:14,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:14,924 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:15,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:15,136 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1403985033, now seen corresponding path program 1 times [2019-11-06 19:10:15,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:15,137 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305078802] [2019-11-06 19:10:15,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:15,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305078802] [2019-11-06 19:10:15,771 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132590907] [2019-11-06 19:10:15,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:15,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:15,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:15,937 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:10:15,937 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:15,937 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-11-06 19:10:15,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820634650] [2019-11-06 19:10:15,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:15,938 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:15,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:15,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:10:15,939 INFO L87 Difference]: Start difference. First operand 6454 states and 8601 transitions. Second operand 3 states. [2019-11-06 19:10:17,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:17,125 INFO L93 Difference]: Finished difference Result 13865 states and 18941 transitions. [2019-11-06 19:10:17,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:17,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-11-06 19:10:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:17,163 INFO L225 Difference]: With dead ends: 13865 [2019-11-06 19:10:17,163 INFO L226 Difference]: Without dead ends: 7605 [2019-11-06 19:10:17,179 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:10:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2019-11-06 19:10:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 7417. [2019-11-06 19:10:17,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7417 states. [2019-11-06 19:10:17,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7417 states to 7417 states and 9886 transitions. [2019-11-06 19:10:17,347 INFO L78 Accepts]: Start accepts. Automaton has 7417 states and 9886 transitions. Word has length 230 [2019-11-06 19:10:17,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:17,348 INFO L462 AbstractCegarLoop]: Abstraction has 7417 states and 9886 transitions. [2019-11-06 19:10:17,348 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:17,348 INFO L276 IsEmpty]: Start isEmpty. Operand 7417 states and 9886 transitions. [2019-11-06 19:10:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-11-06 19:10:17,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:17,358 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:17,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:17,570 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:17,571 INFO L82 PathProgramCache]: Analyzing trace with hash -196615596, now seen corresponding path program 1 times [2019-11-06 19:10:17,571 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:17,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108963924] [2019-11-06 19:10:17,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:17,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108963924] [2019-11-06 19:10:17,886 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925761890] [2019-11-06 19:10:17,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:17,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 19:10:17,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:18,166 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:18,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:18,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:18,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:18,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:18,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:10:18,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:18,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:18,500 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:10:18,500 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-06 19:10:18,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289595975] [2019-11-06 19:10:18,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:10:18,501 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:18,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:10:18,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:10:18,502 INFO L87 Difference]: Start difference. First operand 7417 states and 9886 transitions. Second operand 13 states. [2019-11-06 19:10:23,045 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-11-06 19:10:23,294 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2019-11-06 19:10:25,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:25,495 INFO L93 Difference]: Finished difference Result 15965 states and 22156 transitions. [2019-11-06 19:10:25,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 19:10:25,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 237 [2019-11-06 19:10:25,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:25,528 INFO L225 Difference]: With dead ends: 15965 [2019-11-06 19:10:25,529 INFO L226 Difference]: Without dead ends: 8546 [2019-11-06 19:10:25,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 19:10:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2019-11-06 19:10:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7863. [2019-11-06 19:10:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7863 states. [2019-11-06 19:10:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 9746 transitions. [2019-11-06 19:10:25,728 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 9746 transitions. Word has length 237 [2019-11-06 19:10:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:25,729 INFO L462 AbstractCegarLoop]: Abstraction has 7863 states and 9746 transitions. [2019-11-06 19:10:25,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:10:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 9746 transitions. [2019-11-06 19:10:25,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-06 19:10:25,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:25,742 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:25,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:25,945 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:25,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2125335593, now seen corresponding path program 1 times [2019-11-06 19:10:25,946 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:25,948 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231176141] [2019-11-06 19:10:25,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:26,819 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231176141] [2019-11-06 19:10:26,820 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91953788] [2019-11-06 19:10:26,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:10:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:26,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:10:26,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:27,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 19:10:27,142 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:27,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-11-06 19:10:27,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804430378] [2019-11-06 19:10:27,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:27,144 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:10:27,145 INFO L87 Difference]: Start difference. First operand 7863 states and 9746 transitions. Second operand 5 states. [2019-11-06 19:10:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:28,535 INFO L93 Difference]: Finished difference Result 15563 states and 19359 transitions. [2019-11-06 19:10:28,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:10:28,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2019-11-06 19:10:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:28,558 INFO L225 Difference]: With dead ends: 15563 [2019-11-06 19:10:28,558 INFO L226 Difference]: Without dead ends: 7894 [2019-11-06 19:10:28,575 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:10:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7894 states. [2019-11-06 19:10:28,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7894 to 7877. [2019-11-06 19:10:28,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7877 states. [2019-11-06 19:10:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 9754 transitions. [2019-11-06 19:10:28,747 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 9754 transitions. Word has length 280 [2019-11-06 19:10:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:28,747 INFO L462 AbstractCegarLoop]: Abstraction has 7877 states and 9754 transitions. [2019-11-06 19:10:28,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:28,748 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 9754 transitions. [2019-11-06 19:10:28,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-11-06 19:10:28,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:28,765 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:28,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:28,970 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1210048352, now seen corresponding path program 1 times [2019-11-06 19:10:28,970 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:28,971 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788016020] [2019-11-06 19:10:28,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:29,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:30,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788016020] [2019-11-06 19:10:30,232 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403670743] [2019-11-06 19:10:30,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true