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/Problem14_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:32,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:32,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:32,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:32,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:32,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:32,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:32,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:32,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:32,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:32,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:32,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:32,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:32,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:32,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:32,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:32,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:32,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:32,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:32,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:32,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:32,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:32,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:32,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:32,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:32,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:32,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:32,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:32,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:07:32,853 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:32,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:32,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:32,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:32,857 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:32,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:32,858 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:32,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:32,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:32,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:32,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:32,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:32,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:32,860 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:32,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:32,861 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:32,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:32,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:32,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:32,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:32,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:32,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:32,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:32,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:32,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:32,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:32,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:32,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:32,863 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 [2019-10-13 20:07:33,124 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:33,141 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:33,145 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:33,147 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:33,147 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:33,148 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-10-13 20:07:33,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d816b64/b94ac4a3e5da4fd78e5e8d2cca650ded/FLAG492d624ad [2019-10-13 20:07:33,779 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:33,780 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-10-13 20:07:33,801 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d816b64/b94ac4a3e5da4fd78e5e8d2cca650ded/FLAG492d624ad [2019-10-13 20:07:34,072 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d816b64/b94ac4a3e5da4fd78e5e8d2cca650ded [2019-10-13 20:07:34,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:34,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:34,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:34,085 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:34,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:34,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:34" (1/1) ... [2019-10-13 20:07:34,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a266f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:34, skipping insertion in model container [2019-10-13 20:07:34,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:34" (1/1) ... [2019-10-13 20:07:34,100 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:34,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:34,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:34,743 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:35,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:35,040 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:35,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35 WrapperNode [2019-10-13 20:07:35,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:35,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:35,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:35,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:35,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... [2019-10-13 20:07:35,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:35,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:35,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:35,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:35,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:35,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:35,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:35,327 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:35,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:35,327 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:35,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:35,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:35,329 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:35,329 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:35,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:36,840 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:36,841 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:36,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:36 BoogieIcfgContainer [2019-10-13 20:07:36,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:36,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:36,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:36,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:36,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:34" (1/3) ... [2019-10-13 20:07:36,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eefad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:36, skipping insertion in model container [2019-10-13 20:07:36,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:35" (2/3) ... [2019-10-13 20:07:36,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32eefad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:36, skipping insertion in model container [2019-10-13 20:07:36,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:36" (3/3) ... [2019-10-13 20:07:36,851 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label47.c [2019-10-13 20:07:36,861 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:36,871 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:36,882 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:36,921 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:36,922 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:36,924 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:36,924 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:36,924 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:36,924 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:36,924 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:36,925 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 20:07:36,976 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:36,977 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:36,981 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:36,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1824869262, now seen corresponding path program 1 times [2019-10-13 20:07:37,001 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:37,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41458381] [2019-10-13 20:07:37,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:37,002 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:37,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:37,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41458381] [2019-10-13 20:07:37,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:37,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:37,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124820606] [2019-10-13 20:07:37,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:37,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:37,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:37,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:37,433 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:38,787 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:38,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:38,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-13 20:07:38,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:38,818 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:38,818 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:38,827 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:38,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:38,908 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 39 [2019-10-13 20:07:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:38,909 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:38,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:38,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 20:07:38,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:38,916 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:38,916 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:38,917 INFO L82 PathProgramCache]: Analyzing trace with hash 686981166, now seen corresponding path program 1 times [2019-10-13 20:07:38,917 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:38,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815664455] [2019-10-13 20:07:38,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:38,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:38,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:39,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815664455] [2019-10-13 20:07:39,199 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:39,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:39,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152446637] [2019-10-13 20:07:39,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:39,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:39,203 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:40,492 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:40,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:40,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 20:07:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:40,499 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:40,499 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:40,501 INFO L600 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 [2019-10-13 20:07:40,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:40,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:40,538 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 125 [2019-10-13 20:07:40,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:40,539 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:40,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:40,540 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:07:40,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:40,546 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:40,546 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:40,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:40,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1152023485, now seen corresponding path program 1 times [2019-10-13 20:07:40,547 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:40,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749999931] [2019-10-13 20:07:40,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:40,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:40,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:40,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749999931] [2019-10-13 20:07:40,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:40,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:40,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032449387] [2019-10-13 20:07:40,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:40,681 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:40,682 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:07:42,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:42,245 INFO L93 Difference]: Finished difference Result 2220 states and 3292 transitions. [2019-10-13 20:07:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:42,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-13 20:07:42,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:42,260 INFO L225 Difference]: With dead ends: 2220 [2019-10-13 20:07:42,260 INFO L226 Difference]: Without dead ends: 1664 [2019-10-13 20:07:42,263 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:42,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-13 20:07:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-10-13 20:07:42,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-10-13 20:07:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions. [2019-10-13 20:07:42,363 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 134 [2019-10-13 20:07:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:42,364 INFO L462 AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions. [2019-10-13 20:07:42,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions. [2019-10-13 20:07:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-13 20:07:42,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:42,375 INFO L380 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, 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] [2019-10-13 20:07:42,375 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:42,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:42,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2008848013, now seen corresponding path program 1 times [2019-10-13 20:07:42,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:42,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728592733] [2019-10-13 20:07:42,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:42,376 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:42,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:42,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728592733] [2019-10-13 20:07:42,728 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818198905] [2019-10-13 20:07:42,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:42,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:42,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:42,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,100 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 20:07:43,101 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:43,269 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2019-10-13 20:07:43,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:43,648 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:43,649 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:43,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-10-13 20:07:43,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482544995] [2019-10-13 20:07:43,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:43,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:43,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:43,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:43,651 INFO L87 Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 5 states. [2019-10-13 20:07:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:45,097 INFO L93 Difference]: Finished difference Result 3726 states and 5163 transitions. [2019-10-13 20:07:45,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:45,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2019-10-13 20:07:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:45,109 INFO L225 Difference]: With dead ends: 3726 [2019-10-13 20:07:45,109 INFO L226 Difference]: Without dead ends: 2068 [2019-10-13 20:07:45,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 520 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:07:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-10-13 20:07:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1690. [2019-10-13 20:07:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2019-10-13 20:07:45,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2313 transitions. [2019-10-13 20:07:45,183 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2313 transitions. Word has length 262 [2019-10-13 20:07:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:45,184 INFO L462 AbstractCegarLoop]: Abstraction has 1690 states and 2313 transitions. [2019-10-13 20:07:45,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2313 transitions. [2019-10-13 20:07:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-10-13 20:07:45,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:45,193 INFO L380 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:45,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:45,398 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1769612725, now seen corresponding path program 1 times [2019-10-13 20:07:45,398 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:45,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820633443] [2019-10-13 20:07:45,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:45,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:45,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 182 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:46,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820633443] [2019-10-13 20:07:46,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733606004] [2019-10-13 20:07:46,244 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 [2019-10-13 20:07:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:46,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:46,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:46,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:46,628 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 289 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 20:07:46,628 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:46,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 104 proven. 267 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:47,172 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [63720002] [2019-10-13 20:07:47,177 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 347 [2019-10-13 20:07:47,229 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:47,230 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:59,729 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:59,732 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 484 root evaluator evaluations with a maximum evaluation depth of 13. Performed 484 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:07:59,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:59,736 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:05,383 INFO L227 lantSequenceWeakener]: Weakened 343 states. On average, predicates are now at 77.57% of their original sizes. [2019-10-13 20:08:05,384 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:05,460 INFO L553 sIntCurrentIteration]: We unified 345 AI predicates to 345 [2019-10-13 20:08:05,460 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:05,461 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:05,461 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:08:05,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621620861] [2019-10-13 20:08:05,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:05,463 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:05,463 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:05,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:05,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:05,464 INFO L87 Difference]: Start difference. First operand 1690 states and 2313 transitions. Second operand 11 states.