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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:40:59,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:40:59,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:40:59,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-13 21:40:59,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:40:59,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:40:59,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:40:59,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:40:59,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:40:59,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:40:59,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:40:59,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:40:59,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:40:59,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:40:59,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:40:59,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:40:59,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:40:59,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:40:59,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:40:59,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:40:59,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:40:59,501 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:40:59,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:40:59,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:40:59,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:40:59,503 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:40:59,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:40:59,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:40:59,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:40:59,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:40:59,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:40:59,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:40:59,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:40:59,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:40:59,504 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:40:59,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:40:59,505 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:40:59,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:40:59,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:40:59,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:40:59,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:40:59,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:40:59,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:40:59,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:40:59,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:40:59,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:40:59,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:40:59,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:40:59,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:40:59,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:40:59,757 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:40:59,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:40:59,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:40:59,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:40:59,775 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:40:59,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-10-13 21:40:59,848 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8575c0b/62114d22201a44e7903f0e9db7a6634d/FLAGbb94996b2 [2019-10-13 21:41:00,388 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:41:00,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label13.c [2019-10-13 21:41:00,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8575c0b/62114d22201a44e7903f0e9db7a6634d/FLAGbb94996b2 [2019-10-13 21:41:00,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da8575c0b/62114d22201a44e7903f0e9db7a6634d [2019-10-13 21:41:00,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:41:00,696 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:41:00,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:00,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:41:00,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:41:00,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:00" (1/1) ... [2019-10-13 21:41:00,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c76a8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:00, skipping insertion in model container [2019-10-13 21:41:00,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:00" (1/1) ... [2019-10-13 21:41:00,712 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:41:00,768 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:41:01,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:01,276 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:41:01,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:01,404 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:41:01,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01 WrapperNode [2019-10-13 21:41:01,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:01,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:41:01,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:41:01,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:41:01,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:41:01,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:41:01,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:41:01,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:41:01,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:01,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:41:01,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:41:01,575 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:41:01,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:41:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:41:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:41:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:41:01,575 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:41:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:41:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:41:01,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:41:03,400 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:41:03,402 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:41:03,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:03 BoogieIcfgContainer [2019-10-13 21:41:03,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:41:03,404 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:41:03,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:41:03,408 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:41:03,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:41:00" (1/3) ... [2019-10-13 21:41:03,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfda797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:03, skipping insertion in model container [2019-10-13 21:41:03,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01" (2/3) ... [2019-10-13 21:41:03,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfda797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:03, skipping insertion in model container [2019-10-13 21:41:03,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:03" (3/3) ... [2019-10-13 21:41:03,411 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label13.c [2019-10-13 21:41:03,421 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:41:03,429 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:41:03,439 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:41:03,462 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:41:03,462 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:41:03,463 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:41:03,463 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:41:03,463 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:41:03,463 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:41:03,463 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:41:03,464 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:41:03,486 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-13 21:41:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:41:03,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:03,496 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:03,497 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:03,501 INFO L82 PathProgramCache]: Analyzing trace with hash -219369161, now seen corresponding path program 1 times [2019-10-13 21:41:03,509 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:03,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458614971] [2019-10-13 21:41:03,510 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:03,510 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:03,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:03,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458614971] [2019-10-13 21:41:03,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:03,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:03,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242718724] [2019-10-13 21:41:03,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:03,912 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:03,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:03,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:03,929 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-13 21:41:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:04,501 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-13 21:41:04,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:04,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-13 21:41:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:04,519 INFO L225 Difference]: With dead ends: 273 [2019-10-13 21:41:04,519 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 21:41:04,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 21:41:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-13 21:41:04,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-13 21:41:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 327 transitions. [2019-10-13 21:41:04,588 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 327 transitions. Word has length 86 [2019-10-13 21:41:04,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:04,589 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 327 transitions. [2019-10-13 21:41:04,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:04,589 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 327 transitions. [2019-10-13 21:41:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 21:41:04,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:04,595 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:41:04,595 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:04,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1874064498, now seen corresponding path program 1 times [2019-10-13 21:41:04,596 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:04,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924997486] [2019-10-13 21:41:04,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:04,597 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:04,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:04,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924997486] [2019-10-13 21:41:04,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:04,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:04,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676234801] [2019-10-13 21:41:04,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:04,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:04,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:04,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:04,788 INFO L87 Difference]: Start difference. First operand 175 states and 327 transitions. Second operand 6 states. [2019-10-13 21:41:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:05,158 INFO L93 Difference]: Finished difference Result 351 states and 663 transitions. [2019-10-13 21:41:05,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:41:05,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-13 21:41:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:05,163 INFO L225 Difference]: With dead ends: 351 [2019-10-13 21:41:05,163 INFO L226 Difference]: Without dead ends: 181 [2019-10-13 21:41:05,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:41:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-13 21:41:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 177. [2019-10-13 21:41:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-13 21:41:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 299 transitions. [2019-10-13 21:41:05,195 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 299 transitions. Word has length 101 [2019-10-13 21:41:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:05,195 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 299 transitions. [2019-10-13 21:41:05,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 299 transitions. [2019-10-13 21:41:05,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 21:41:05,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:05,198 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:05,198 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1307307617, now seen corresponding path program 1 times [2019-10-13 21:41:05,199 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:05,199 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705421369] [2019-10-13 21:41:05,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:05,200 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:05,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:05,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705421369] [2019-10-13 21:41:05,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:05,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:05,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383429045] [2019-10-13 21:41:05,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:05,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:05,333 INFO L87 Difference]: Start difference. First operand 177 states and 299 transitions. Second operand 6 states. [2019-10-13 21:41:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:05,900 INFO L93 Difference]: Finished difference Result 453 states and 784 transitions. [2019-10-13 21:41:05,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:41:05,902 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-13 21:41:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:05,905 INFO L225 Difference]: With dead ends: 453 [2019-10-13 21:41:05,905 INFO L226 Difference]: Without dead ends: 281 [2019-10-13 21:41:05,906 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 [2019-10-13 21:41:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-13 21:41:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2019-10-13 21:41:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-10-13 21:41:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 433 transitions. [2019-10-13 21:41:05,930 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 433 transitions. Word has length 108 [2019-10-13 21:41:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:05,931 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 433 transitions. [2019-10-13 21:41:05,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 433 transitions. [2019-10-13 21:41:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 21:41:05,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:05,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:05,935 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash -852396249, now seen corresponding path program 1 times [2019-10-13 21:41:05,935 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:05,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229655794] [2019-10-13 21:41:05,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:05,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:05,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:06,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229655794] [2019-10-13 21:41:06,025 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:06,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:06,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160658784] [2019-10-13 21:41:06,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:06,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:06,027 INFO L87 Difference]: Start difference. First operand 267 states and 433 transitions. Second operand 3 states. [2019-10-13 21:41:06,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:06,359 INFO L93 Difference]: Finished difference Result 703 states and 1156 transitions. [2019-10-13 21:41:06,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:06,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 112 [2019-10-13 21:41:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:06,363 INFO L225 Difference]: With dead ends: 703 [2019-10-13 21:41:06,363 INFO L226 Difference]: Without dead ends: 441 [2019-10-13 21:41:06,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2019-10-13 21:41:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2019-10-13 21:41:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-13 21:41:06,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 643 transitions. [2019-10-13 21:41:06,393 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 643 transitions. Word has length 112 [2019-10-13 21:41:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:06,393 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 643 transitions. [2019-10-13 21:41:06,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 643 transitions. [2019-10-13 21:41:06,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 21:41:06,398 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:06,398 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:06,398 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:06,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:06,399 INFO L82 PathProgramCache]: Analyzing trace with hash 5336562, now seen corresponding path program 1 times [2019-10-13 21:41:06,399 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:06,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001818768] [2019-10-13 21:41:06,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:06,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:06,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:06,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001818768] [2019-10-13 21:41:06,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097116254] [2019-10-13 21:41:06,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:06,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:06,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:06,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:41:06,825 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:41:06,877 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:41:06,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-13 21:41:06,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029248327] [2019-10-13 21:41:06,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:06,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:06,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:06,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:41:06,879 INFO L87 Difference]: Start difference. First operand 441 states and 643 transitions. Second operand 3 states. [2019-10-13 21:41:07,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:07,218 INFO L93 Difference]: Finished difference Result 1217 states and 1814 transitions. [2019-10-13 21:41:07,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:07,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-13 21:41:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:07,224 INFO L225 Difference]: With dead ends: 1217 [2019-10-13 21:41:07,224 INFO L226 Difference]: Without dead ends: 609 [2019-10-13 21:41:07,226 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:41:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-13 21:41:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-10-13 21:41:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-13 21:41:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 760 transitions. [2019-10-13 21:41:07,260 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 760 transitions. Word has length 121 [2019-10-13 21:41:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:07,261 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 760 transitions. [2019-10-13 21:41:07,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 760 transitions. [2019-10-13 21:41:07,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 21:41:07,265 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:07,265 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:07,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:07,480 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:07,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1090347318, now seen corresponding path program 1 times [2019-10-13 21:41:07,481 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:07,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828422069] [2019-10-13 21:41:07,482 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:07,482 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:07,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 21:41:07,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828422069] [2019-10-13 21:41:07,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916086262] [2019-10-13 21:41:07,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:07,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:07,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:41:07,818 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-13 21:41:07,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98253296] [2019-10-13 21:41:07,941 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-13 21:41:07,941 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:41:07,947 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:41:07,954 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:41:07,955 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:41:08,176 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-13 21:41:08,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:08,707 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:41:08,714 INFO L168 Benchmark]: Toolchain (without parser) took 8016.58 ms. Allocated memory was 136.8 MB in the beginning and 353.9 MB in the end (delta: 217.1 MB). Free memory was 99.8 MB in the beginning and 87.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 229.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:08,721 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:41:08,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 707.73 ms. Allocated memory was 136.8 MB in the beginning and 203.9 MB in the end (delta: 67.1 MB). Free memory was 99.6 MB in the beginning and 170.8 MB in the end (delta: -71.2 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:08,723 INFO L168 Benchmark]: Boogie Preprocessor took 112.22 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 165.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:08,724 INFO L168 Benchmark]: RCFGBuilder took 1885.53 ms. Allocated memory was 203.9 MB in the beginning and 257.4 MB in the end (delta: 53.5 MB). Free memory was 165.8 MB in the beginning and 210.1 MB in the end (delta: -44.3 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:08,725 INFO L168 Benchmark]: TraceAbstraction took 5306.43 ms. Allocated memory was 257.4 MB in the beginning and 353.9 MB in the end (delta: 96.5 MB). Free memory was 210.1 MB in the beginning and 87.3 MB in the end (delta: 122.8 MB). Peak memory consumption was 219.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:08,730 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 136.8 MB. Free memory was 120.1 MB in the beginning and 119.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 707.73 ms. Allocated memory was 136.8 MB in the beginning and 203.9 MB in the end (delta: 67.1 MB). Free memory was 99.6 MB in the beginning and 170.8 MB in the end (delta: -71.2 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.22 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 165.8 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1885.53 ms. Allocated memory was 203.9 MB in the beginning and 257.4 MB in the end (delta: 53.5 MB). Free memory was 165.8 MB in the beginning and 210.1 MB in the end (delta: -44.3 MB). Peak memory consumption was 118.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5306.43 ms. Allocated memory was 257.4 MB in the beginning and 353.9 MB in the end (delta: 96.5 MB). Free memory was 210.1 MB in the beginning and 87.3 MB in the end (delta: 122.8 MB). Peak memory consumption was 219.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...