/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:40,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:40,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:40,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:54:40,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:54:40,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:54:40,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:54:40,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:54:40,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:54:40,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:54:40,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:54:40,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:54:40,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:40,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:40,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:40,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:40,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:40,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:40,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:40,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:40,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:40,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:40,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:40,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:40,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:40,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:40,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:40,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:40,776 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 22:54:40,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:40,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:40,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:40,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:40,807 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:40,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:40,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:40,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:40,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:40,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:40,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:40,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:40,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:40,810 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:40,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:40,810 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:40,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:40,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:40,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:40,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:40,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:40,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:40,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:40,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:40,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:40,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:40,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:40,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:40,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:54:41,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:41,095 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:41,099 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:41,100 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:41,101 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:41,101 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-11-06 22:54:41,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb90d6af/1d3dfeeaa8d1406ab6bec7a4945d615a/FLAGf59a8bbf7 [2019-11-06 22:54:41,841 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:41,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-11-06 22:54:41,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb90d6af/1d3dfeeaa8d1406ab6bec7a4945d615a/FLAGf59a8bbf7 [2019-11-06 22:54:42,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb90d6af/1d3dfeeaa8d1406ab6bec7a4945d615a [2019-11-06 22:54:42,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:42,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:42,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:42,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:42,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:42,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:42" (1/1) ... [2019-11-06 22:54:42,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de9500b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:42, skipping insertion in model container [2019-11-06 22:54:42,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:42" (1/1) ... [2019-11-06 22:54:42,120 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:42,195 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:43,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:43,011 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:43,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:43,291 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:43,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43 WrapperNode [2019-11-06 22:54:43,293 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:43,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:43,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:43,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:43,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (1/1) ... [2019-11-06 22:54:43,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:43,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:43,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:43,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:43,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (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 22:54:43,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:43,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:43,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:43,548 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:43,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:43,548 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:43,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:43,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:43,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:45,930 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:45,930 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:45,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:45 BoogieIcfgContainer [2019-11-06 22:54:45,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:45,938 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:45,938 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:45,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:45,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:42" (1/3) ... [2019-11-06 22:54:45,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ccf989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:45, skipping insertion in model container [2019-11-06 22:54:45,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:43" (2/3) ... [2019-11-06 22:54:45,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ccf989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:45, skipping insertion in model container [2019-11-06 22:54:45,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:45" (3/3) ... [2019-11-06 22:54:45,951 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label25.c [2019-11-06 22:54:45,965 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:45,974 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:45,987 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:46,018 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:46,018 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:46,018 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:46,018 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:46,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:46,019 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:46,019 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:46,019 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 22:54:46,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:46,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:46,060 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:46,066 INFO L82 PathProgramCache]: Analyzing trace with hash 134360965, now seen corresponding path program 1 times [2019-11-06 22:54:46,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:46,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979256899] [2019-11-06 22:54:46,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:46,412 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 22:54:46,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979256899] [2019-11-06 22:54:46,414 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:46,414 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:46,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320277216] [2019-11-06 22:54:46,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:46,423 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:46,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:46,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:46,443 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:48,842 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:48,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:48,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2019-11-06 22:54:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:48,870 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:48,870 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:48,880 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:54:48,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-11-06 22:54:49,007 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 56 [2019-11-06 22:54:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:49,008 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-11-06 22:54:49,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-11-06 22:54:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-06 22:54:49,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:49,018 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, 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] [2019-11-06 22:54:49,018 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:49,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:49,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1822554259, now seen corresponding path program 1 times [2019-11-06 22:54:49,019 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:49,019 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873288643] [2019-11-06 22:54:49,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:49,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873288643] [2019-11-06 22:54:49,311 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:49,311 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:49,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673065696] [2019-11-06 22:54:49,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:49,313 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:49,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:49,314 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-11-06 22:54:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:52,116 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-11-06 22:54:52,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:52,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 163 [2019-11-06 22:54:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:52,127 INFO L225 Difference]: With dead ends: 1733 [2019-11-06 22:54:52,127 INFO L226 Difference]: Without dead ends: 1057 [2019-11-06 22:54:52,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-11-06 22:54:52,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-11-06 22:54:52,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-11-06 22:54:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-11-06 22:54:52,195 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 163 [2019-11-06 22:54:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:52,199 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-11-06 22:54:52,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-11-06 22:54:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:54:52,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:52,211 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, 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] [2019-11-06 22:54:52,211 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:52,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:52,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1458338452, now seen corresponding path program 1 times [2019-11-06 22:54:52,212 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:52,212 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436522418] [2019-11-06 22:54:52,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:52,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436522418] [2019-11-06 22:54:52,477 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:52,477 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:52,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522166019] [2019-11-06 22:54:52,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:52,478 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:52,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:52,479 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-11-06 22:54:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:55,109 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-11-06 22:54:55,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:55,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-11-06 22:54:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:55,123 INFO L225 Difference]: With dead ends: 3130 [2019-11-06 22:54:55,123 INFO L226 Difference]: Without dead ends: 2097 [2019-11-06 22:54:55,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-11-06 22:54:55,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-11-06 22:54:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:54:55,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-11-06 22:54:55,201 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 166 [2019-11-06 22:54:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:55,205 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-11-06 22:54:55,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-11-06 22:54:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-11-06 22:54:55,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:55,209 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:55,210 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:55,210 INFO L82 PathProgramCache]: Analyzing trace with hash -169330708, now seen corresponding path program 1 times [2019-11-06 22:54:55,210 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:55,211 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205400462] [2019-11-06 22:54:55,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 98 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:55,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205400462] [2019-11-06 22:54:55,483 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814230715] [2019-11-06 22:54:55,484 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 22:54:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:55,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:54:55,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 22:54:55,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 98 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:55,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:54:55,944 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:54:55,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836794401] [2019-11-06 22:54:55,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:55,945 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:55,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:55,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:54:55,946 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-11-06 22:54:58,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:58,797 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-11-06 22:54:58,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:58,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 281 [2019-11-06 22:54:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:58,822 INFO L225 Difference]: With dead ends: 6247 [2019-11-06 22:54:58,822 INFO L226 Difference]: Without dead ends: 4172 [2019-11-06 22:54:58,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 557 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:54:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-11-06 22:54:58,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-11-06 22:54:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-11-06 22:54:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-11-06 22:54:58,942 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 281 [2019-11-06 22:54:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:58,943 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-11-06 22:54:58,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-11-06 22:54:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2019-11-06 22:54:58,954 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:58,955 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:59,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:59,160 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash 909641137, now seen corresponding path program 1 times [2019-11-06 22:54:59,161 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:59,161 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061458087] [2019-11-06 22:54:59,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 152 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:54:59,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061458087] [2019-11-06 22:54:59,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401636903] [2019-11-06 22:54:59,587 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 22:54:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:59,756 INFO L256 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:59,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 410 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 22:54:59,992 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 249 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 22:55:00,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1647065003] [2019-11-06 22:55:00,254 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 490 [2019-11-06 22:55:00,308 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:00,308 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:55:16,898 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:55:16,900 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:55:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:16,904 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates