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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:27,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:27,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:27,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:27,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:27,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:27,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:27,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:27,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:27,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:27,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:27,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:27,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:27,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:27,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:27,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:27,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:27,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:27,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:27,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:27,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:27,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:27,750 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:27,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:27,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:27,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:27,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:27,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:27,769 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 [2019-10-15 00:09:27,789 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:27,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:27,790 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:27,790 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:27,791 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:27,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:27,791 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:27,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:27,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:27,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:27,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:27,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:27,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:27,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:27,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:27,794 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:27,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:27,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:27,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:27,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:27,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:27,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:27,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:27,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:27,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:27,796 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:27,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:27,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:27,797 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 [2019-10-15 00:09:28,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:28,087 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:28,090 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:28,091 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:28,092 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:28,093 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-15 00:09:28,161 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fc3bebf7/5358a39b85f94e1e82399aaa287c70e8/FLAG62d6c37c3 [2019-10-15 00:09:28,836 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:28,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-15 00:09:28,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fc3bebf7/5358a39b85f94e1e82399aaa287c70e8/FLAG62d6c37c3 [2019-10-15 00:09:29,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7fc3bebf7/5358a39b85f94e1e82399aaa287c70e8 [2019-10-15 00:09:29,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:29,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:29,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:29,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:29,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:29,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:29" (1/1) ... [2019-10-15 00:09:29,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:29, skipping insertion in model container [2019-10-15 00:09:29,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:29" (1/1) ... [2019-10-15 00:09:29,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:29,137 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:29,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:29,964 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:30,320 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:30,344 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:30,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30 WrapperNode [2019-10-15 00:09:30,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:30,346 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:30,346 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:30,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:30,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (1/1) ... [2019-10-15 00:09:30,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:30,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:30,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:30,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:30,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (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 [2019-10-15 00:09:30,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:30,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:30,613 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:30,613 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:30,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:30,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:30,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:30,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:32,868 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:32,868 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:32,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:32 BoogieIcfgContainer [2019-10-15 00:09:32,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:32,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:32,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:32,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:32,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:29" (1/3) ... [2019-10-15 00:09:32,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3083da3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:32, skipping insertion in model container [2019-10-15 00:09:32,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:30" (2/3) ... [2019-10-15 00:09:32,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3083da3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:32, skipping insertion in model container [2019-10-15 00:09:32,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:32" (3/3) ... [2019-10-15 00:09:32,885 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-10-15 00:09:32,898 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:32,911 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:32,923 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:32,968 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:32,968 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:32,969 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:32,969 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:32,969 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:32,969 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:32,969 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:32,969 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 00:09:33,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:33,014 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:33,016 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash 10915389, now seen corresponding path program 1 times [2019-10-15 00:09:33,030 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:33,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583188341] [2019-10-15 00:09:33,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:33,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:33,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:33,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583188341] [2019-10-15 00:09:33,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:33,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:33,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506569450] [2019-10-15 00:09:33,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:33,349 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:33,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:33,368 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:35,563 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:35,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:35,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-15 00:09:35,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:35,587 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:35,588 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:35,598 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 [2019-10-15 00:09:35,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-15 00:09:35,714 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 46 [2019-10-15 00:09:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:35,718 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-15 00:09:35,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-15 00:09:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 00:09:35,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:35,731 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, 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] [2019-10-15 00:09:35,732 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:35,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:35,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1929780272, now seen corresponding path program 1 times [2019-10-15 00:09:35,733 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:35,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602548506] [2019-10-15 00:09:35,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:35,734 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:35,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:36,010 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:36,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602548506] [2019-10-15 00:09:36,011 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:36,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:36,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630853653] [2019-10-15 00:09:36,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:36,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:36,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:36,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:36,015 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-15 00:09:38,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:38,680 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-15 00:09:38,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:38,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-15 00:09:38,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:38,691 INFO L225 Difference]: With dead ends: 1730 [2019-10-15 00:09:38,691 INFO L226 Difference]: Without dead ends: 1054 [2019-10-15 00:09:38,694 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-15 00:09:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-15 00:09:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-15 00:09:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-15 00:09:38,766 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 138 [2019-10-15 00:09:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:38,767 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-15 00:09:38,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-15 00:09:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-10-15 00:09:38,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:38,773 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:38,774 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:38,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1919775263, now seen corresponding path program 1 times [2019-10-15 00:09:38,774 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:38,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578113025] [2019-10-15 00:09:38,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:38,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:38,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:39,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578113025] [2019-10-15 00:09:39,046 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251176392] [2019-10-15 00:09:39,046 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 [2019-10-15 00:09:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:39,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:39,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 00:09:39,330 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:39,516 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:39,516 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:39,516 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908714353] [2019-10-15 00:09:39,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:39,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:39,528 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-15 00:09:42,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:42,047 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-15 00:09:42,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:42,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 248 [2019-10-15 00:09:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:42,064 INFO L225 Difference]: With dead ends: 2427 [2019-10-15 00:09:42,065 INFO L226 Difference]: Without dead ends: 1399 [2019-10-15 00:09:42,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 491 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-15 00:09:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-15 00:09:42,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-15 00:09:42,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-15 00:09:42,124 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 248 [2019-10-15 00:09:42,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:42,125 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-15 00:09:42,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-15 00:09:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-10-15 00:09:42,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:42,134 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, 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, 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] [2019-10-15 00:09:42,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:42,340 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 68738983, now seen corresponding path program 1 times [2019-10-15 00:09:42,342 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:42,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780102267] [2019-10-15 00:09:42,342 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:42,343 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:42,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 117 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:42,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780102267] [2019-10-15 00:09:42,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244851168] [2019-10-15 00:09:42,654 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 [2019-10-15 00:09:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:42,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:42,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-10-15 00:09:42,873 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 117 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:43,089 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:43,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:09:43,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585018120] [2019-10-15 00:09:43,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:43,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:43,092 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-15 00:09:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:48,276 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-10-15 00:09:48,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:48,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2019-10-15 00:09:48,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:48,300 INFO L225 Difference]: With dead ends: 4241 [2019-10-15 00:09:48,300 INFO L226 Difference]: Without dead ends: 2859 [2019-10-15 00:09:48,305 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 644 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-10-15 00:09:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-10-15 00:09:48,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-15 00:09:48,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-10-15 00:09:48,411 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 323 [2019-10-15 00:09:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:48,413 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-10-15 00:09:48,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-10-15 00:09:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-10-15 00:09:48,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:48,421 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, 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, 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] [2019-10-15 00:09:48,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:48,629 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash 802856799, now seen corresponding path program 1 times [2019-10-15 00:09:48,631 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:48,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752066820] [2019-10-15 00:09:48,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:48,632 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:48,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 117 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:48,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752066820] [2019-10-15 00:09:48,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601827507] [2019-10-15 00:09:48,909 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 [2019-10-15 00:09:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:49,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:49,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-10-15 00:09:49,204 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 117 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:49,352 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:49,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:49,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163341203] [2019-10-15 00:09:49,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:49,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:49,354 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-10-15 00:09:51,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:51,981 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-10-15 00:09:51,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:51,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2019-10-15 00:09:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:52,014 INFO L225 Difference]: With dead ends: 8487 [2019-10-15 00:09:52,015 INFO L226 Difference]: Without dead ends: 5674 [2019-10-15 00:09:52,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 649 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-15 00:09:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-15 00:09:52,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-15 00:09:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7782 transitions. [2019-10-15 00:09:52,187 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7782 transitions. Word has length 327 [2019-10-15 00:09:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:52,192 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7782 transitions. [2019-10-15 00:09:52,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7782 transitions. [2019-10-15 00:09:52,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-10-15 00:09:52,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:52,200 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:52,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:52,405 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:52,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:52,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1373072005, now seen corresponding path program 1 times [2019-10-15 00:09:52,406 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:52,406 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613632696] [2019-10-15 00:09:52,407 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:52,407 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:52,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:53,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613632696] [2019-10-15 00:09:53,699 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115723116] [2019-10-15 00:09:53,700 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 [2019-10-15 00:09:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:53,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:53,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:54,008 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:54,232 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:54,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [712146565] [2019-10-15 00:09:54,238 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 353 [2019-10-15 00:09:54,292 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:54,293 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:58,298 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.