/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:26,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:26,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:26,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:56:26,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:56:26,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:56:26,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:56:26,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:56:26,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:56:26,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:56:26,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:56:26,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:56:26,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:26,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:26,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:26,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:26,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:26,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:26,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:26,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:26,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:26,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:27,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:27,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:27,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:27,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:27,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:27,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:27,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:56:27,026 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:27,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:27,028 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:27,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:27,028 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:27,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:27,029 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:27,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:27,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:27,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:27,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:27,030 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:27,030 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:27,030 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:27,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:27,030 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:27,031 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:27,031 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:27,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:27,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:27,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:27,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:27,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:27,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:27,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:27,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:27,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:27,033 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:27,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:56:27,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:27,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:27,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:27,351 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:27,352 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:27,352 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-11-06 22:56:27,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724a40366/ad967c142fdc4816acca5aa971488bbc/FLAGd41650bfa [2019-11-06 22:56:28,064 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:28,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label58.c [2019-11-06 22:56:28,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724a40366/ad967c142fdc4816acca5aa971488bbc/FLAGd41650bfa [2019-11-06 22:56:28,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724a40366/ad967c142fdc4816acca5aa971488bbc [2019-11-06 22:56:28,253 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:28,255 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:28,256 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:28,256 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:28,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:28,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:28" (1/1) ... [2019-11-06 22:56:28,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123ae4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:28, skipping insertion in model container [2019-11-06 22:56:28,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:28" (1/1) ... [2019-11-06 22:56:28,273 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:28,373 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:29,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:29,275 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:29,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:29,534 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:29,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29 WrapperNode [2019-11-06 22:56:29,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:29,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:29,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:29,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:29,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,678 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... [2019-11-06 22:56:29,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:29,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:29,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:29,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:29,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:29,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:29,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:29,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:29,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:32,419 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:32,419 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:32,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:32 BoogieIcfgContainer [2019-11-06 22:56:32,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:32,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:32,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:32,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:32,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:28" (1/3) ... [2019-11-06 22:56:32,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1703f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:32, skipping insertion in model container [2019-11-06 22:56:32,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:29" (2/3) ... [2019-11-06 22:56:32,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1703f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:32, skipping insertion in model container [2019-11-06 22:56:32,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:32" (3/3) ... [2019-11-06 22:56:32,438 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label58.c [2019-11-06 22:56:32,453 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:32,462 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:32,474 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:32,514 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:32,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:32,515 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:32,515 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:32,515 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:32,515 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:32,515 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:32,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:56:32,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 22:56:32,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:32,551 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:32,553 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:32,559 INFO L82 PathProgramCache]: Analyzing trace with hash -129772806, now seen corresponding path program 1 times [2019-11-06 22:56:32,568 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:32,569 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912991116] [2019-11-06 22:56:32,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:32,905 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912991116] [2019-11-06 22:56:32,906 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:32,906 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:56:32,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29765734] [2019-11-06 22:56:32,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:32,915 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:32,932 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:56:35,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:35,671 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:56:35,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:35,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2019-11-06 22:56:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:35,696 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:56:35,696 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:56:35,705 INFO L630 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 [2019-11-06 22:56:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:56:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:56:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:56:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:56:35,800 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 57 [2019-11-06 22:56:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:35,801 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:56:35,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:35,801 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:56:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-06 22:56:35,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:35,808 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:35,808 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1636148102, now seen corresponding path program 1 times [2019-11-06 22:56:35,809 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:35,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106109414] [2019-11-06 22:56:35,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:36,161 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:36,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106109414] [2019-11-06 22:56:36,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:36,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:36,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141520974] [2019-11-06 22:56:36,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:36,166 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:36,167 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-11-06 22:56:39,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:39,181 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-11-06 22:56:39,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:39,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-11-06 22:56:39,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:39,196 INFO L225 Difference]: With dead ends: 1730 [2019-11-06 22:56:39,196 INFO L226 Difference]: Without dead ends: 1054 [2019-11-06 22:56:39,199 INFO L630 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 [2019-11-06 22:56:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-06 22:56:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-11-06 22:56:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-11-06 22:56:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-11-06 22:56:39,274 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 149 [2019-11-06 22:56:39,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:39,277 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-11-06 22:56:39,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-11-06 22:56:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-06 22:56:39,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:39,290 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:39,291 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:39,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:39,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1608986538, now seen corresponding path program 1 times [2019-11-06 22:56:39,291 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:39,292 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716264521] [2019-11-06 22:56:39,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:39,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716264521] [2019-11-06 22:56:39,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174166836] [2019-11-06 22:56:39,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:39,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:39,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-06 22:56:39,934 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 100 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:40,203 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:40,204 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:40,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227691796] [2019-11-06 22:56:40,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:40,213 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:40,214 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-11-06 22:56:45,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:45,150 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-11-06 22:56:45,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:45,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-11-06 22:56:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:45,161 INFO L225 Difference]: With dead ends: 2427 [2019-11-06 22:56:45,161 INFO L226 Difference]: Without dead ends: 1399 [2019-11-06 22:56:45,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 513 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:45,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-11-06 22:56:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-11-06 22:56:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-11-06 22:56:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-11-06 22:56:45,207 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 259 [2019-11-06 22:56:45,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:45,208 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-11-06 22:56:45,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-11-06 22:56:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-11-06 22:56:45,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:45,216 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-06 22:56:45,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:45,424 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1534419377, now seen corresponding path program 1 times [2019-11-06 22:56:45,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:45,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114010067] [2019-11-06 22:56:45,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:45,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114010067] [2019-11-06 22:56:45,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143653328] [2019-11-06 22:56:45,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:45,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:46,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 198 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-11-06 22:56:46,099 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 150 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:46,347 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:46,347 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:56:46,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234052812] [2019-11-06 22:56:46,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:46,350 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:46,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:46,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:46,350 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-11-06 22:56:50,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:50,104 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-11-06 22:56:50,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:50,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-11-06 22:56:50,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:50,121 INFO L225 Difference]: With dead ends: 4241 [2019-11-06 22:56:50,121 INFO L226 Difference]: Without dead ends: 2859 [2019-11-06 22:56:50,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 677 GetRequests, 666 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:56:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-11-06 22:56:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-11-06 22:56:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-11-06 22:56:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4286 transitions. [2019-11-06 22:56:50,231 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4286 transitions. Word has length 334 [2019-11-06 22:56:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:50,233 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4286 transitions. [2019-11-06 22:56:50,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4286 transitions. [2019-11-06 22:56:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-11-06 22:56:50,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:50,241 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-06 22:56:50,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:50,446 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1718340841, now seen corresponding path program 1 times [2019-11-06 22:56:50,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:50,448 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975194457] [2019-11-06 22:56:50,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:50,682 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 150 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:50,682 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975194457] [2019-11-06 22:56:50,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010857025] [2019-11-06 22:56:50,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:50,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:50,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:50,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-11-06 22:56:51,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 150 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:51,226 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:51,227 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:51,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183116877] [2019-11-06 22:56:51,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:51,228 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:51,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:51,229 INFO L87 Difference]: Start difference. First operand 2819 states and 4286 transitions. Second operand 5 states. [2019-11-06 22:56:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:54,694 INFO L93 Difference]: Finished difference Result 8487 states and 13369 transitions. [2019-11-06 22:56:54,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:54,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2019-11-06 22:56:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:54,731 INFO L225 Difference]: With dead ends: 8487 [2019-11-06 22:56:54,731 INFO L226 Difference]: Without dead ends: 5674 [2019-11-06 22:56:54,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 671 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-11-06 22:56:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-11-06 22:56:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-11-06 22:56:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7782 transitions. [2019-11-06 22:56:54,919 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7782 transitions. Word has length 338 [2019-11-06 22:56:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:54,920 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7782 transitions. [2019-11-06 22:56:54,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:54,920 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7782 transitions. [2019-11-06 22:56:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2019-11-06 22:56:54,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:54,929 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:56:55,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:55,134 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:55,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:55,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1405018386, now seen corresponding path program 1 times [2019-11-06 22:56:55,134 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:55,134 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407643905] [2019-11-06 22:56:55,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:56,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407643905] [2019-11-06 22:56:56,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565867395] [2019-11-06 22:56:56,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:56,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:56,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:56,689 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:56,927 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [391684423] [2019-11-06 22:56:56,932 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 364 [2019-11-06 22:56:56,997 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:56,998 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:57:01,103 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.