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/Problem01_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:39:49,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:39:49,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:39:49,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:39:49,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:39:49,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:39:49,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:39:49,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:39:49,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:39:49,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:39:49,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:39:49,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:39:49,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:39:49,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:39:49,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:39:49,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:39:49,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:39:49,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:39:49,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:39:49,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:39:49,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:39:49,453 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:39:49,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:39:49,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:39:49,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:39:49,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:39:49,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:39:49,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:39:49,471 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 21:39:49,506 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:39:49,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:39:49,507 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:39:49,507 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:39:49,507 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:39:49,508 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:39:49,508 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:39:49,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:39:49,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:39:49,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:39:49,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:39:49,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:39:49,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:39:49,511 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:39:49,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:39:49,512 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:39:49,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:39:49,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:39:49,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:39:49,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:39:49,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:39:49,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:39:49,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:39:49,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:39:49,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:39:49,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:39:49,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:39:49,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:39:49,514 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 21:39:49,786 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:39:49,806 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:39:49,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:39:49,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:39:49,811 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:39:49,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-10-13 21:39:49,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08905f338/23b80993e2344943871c93bd9f574bc4/FLAGea6130c08 [2019-10-13 21:39:50,475 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:39:50,476 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label02.c [2019-10-13 21:39:50,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08905f338/23b80993e2344943871c93bd9f574bc4/FLAGea6130c08 [2019-10-13 21:39:50,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08905f338/23b80993e2344943871c93bd9f574bc4 [2019-10-13 21:39:50,696 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:39:50,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:39:50,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:39:50,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:39:50,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:39:50,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:39:50" (1/1) ... [2019-10-13 21:39:50,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5782f2d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:50, skipping insertion in model container [2019-10-13 21:39:50,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:39:50" (1/1) ... [2019-10-13 21:39:50,713 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:39:50,766 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:39:51,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:39:51,174 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:39:51,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:39:51,414 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:39:51,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51 WrapperNode [2019-10-13 21:39:51,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:39:51,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:39:51,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:39:51,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:39:51,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (1/1) ... [2019-10-13 21:39:51,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:39:51,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:39:51,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:39:51,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:39:51,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (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 21:39:51,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:39:51,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:39:51,587 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:39:51,587 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:39:51,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:39:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:39:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:39:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:39:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:39:51,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:39:51,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:39:53,512 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:39:53,513 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:39:53,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:39:53 BoogieIcfgContainer [2019-10-13 21:39:53,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:39:53,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:39:53,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:39:53,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:39:53,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:39:50" (1/3) ... [2019-10-13 21:39:53,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5015a691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:39:53, skipping insertion in model container [2019-10-13 21:39:53,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:39:51" (2/3) ... [2019-10-13 21:39:53,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5015a691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:39:53, skipping insertion in model container [2019-10-13 21:39:53,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:39:53" (3/3) ... [2019-10-13 21:39:53,523 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label02.c [2019-10-13 21:39:53,533 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:39:53,541 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:39:53,553 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:39:53,582 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:39:53,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:39:53,583 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:39:53,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:39:53,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:39:53,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:39:53,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:39:53,584 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:39:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-13 21:39:53,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 21:39:53,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:53,616 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] [2019-10-13 21:39:53,618 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:53,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:53,624 INFO L82 PathProgramCache]: Analyzing trace with hash 826813922, now seen corresponding path program 1 times [2019-10-13 21:39:53,633 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:53,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951715975] [2019-10-13 21:39:53,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:53,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:53,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:54,096 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 21:39:54,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951715975] [2019-10-13 21:39:54,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:39:54,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:39:54,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055397104] [2019-10-13 21:39:54,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:39:54,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:54,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:39:54,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:39:54,126 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-13 21:39:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:54,727 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-13 21:39:54,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:39:54,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-13 21:39:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:54,752 INFO L225 Difference]: With dead ends: 246 [2019-10-13 21:39:54,752 INFO L226 Difference]: Without dead ends: 157 [2019-10-13 21:39:54,757 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 21:39:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-13 21:39:54,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-13 21:39:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 21:39:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2019-10-13 21:39:54,855 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2019-10-13 21:39:54,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:54,857 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2019-10-13 21:39:54,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:39:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2019-10-13 21:39:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 21:39:54,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:54,867 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:39:54,867 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:54,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1195672711, now seen corresponding path program 1 times [2019-10-13 21:39:54,869 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:54,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648376159] [2019-10-13 21:39:54,870 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:54,870 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:54,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:55,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648376159] [2019-10-13 21:39:55,023 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:39:55,023 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:39:55,023 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376670573] [2019-10-13 21:39:55,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:39:55,026 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:55,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:39:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:39:55,027 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand 6 states. [2019-10-13 21:39:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:55,670 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2019-10-13 21:39:55,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:39:55,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-10-13 21:39:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:55,678 INFO L225 Difference]: With dead ends: 402 [2019-10-13 21:39:55,678 INFO L226 Difference]: Without dead ends: 250 [2019-10-13 21:39:55,682 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 21:39:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-10-13 21:39:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2019-10-13 21:39:55,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-13 21:39:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2019-10-13 21:39:55,727 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2019-10-13 21:39:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:55,730 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2019-10-13 21:39:55,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:39:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2019-10-13 21:39:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 21:39:55,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:55,733 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:39:55,734 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:55,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:55,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2128694315, now seen corresponding path program 1 times [2019-10-13 21:39:55,734 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:55,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768783259] [2019-10-13 21:39:55,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:55,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:55,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:55,850 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768783259] [2019-10-13 21:39:55,850 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:39:55,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:39:55,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626281620] [2019-10-13 21:39:55,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:39:55,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:39:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:39:55,855 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand 3 states. [2019-10-13 21:39:56,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:56,279 INFO L93 Difference]: Finished difference Result 700 states and 1240 transitions. [2019-10-13 21:39:56,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:39:56,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-13 21:39:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:56,284 INFO L225 Difference]: With dead ends: 700 [2019-10-13 21:39:56,285 INFO L226 Difference]: Without dead ends: 467 [2019-10-13 21:39:56,286 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 21:39:56,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-10-13 21:39:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2019-10-13 21:39:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-13 21:39:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 799 transitions. [2019-10-13 21:39:56,317 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 799 transitions. Word has length 88 [2019-10-13 21:39:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:56,318 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 799 transitions. [2019-10-13 21:39:56,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:39:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 799 transitions. [2019-10-13 21:39:56,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:39:56,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:56,324 INFO L380 BasicCegarLoop]: trace histogram [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 21:39:56,324 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash 579788873, now seen corresponding path program 1 times [2019-10-13 21:39:56,325 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:56,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704502549] [2019-10-13 21:39:56,325 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:56,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:56,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:56,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704502549] [2019-10-13 21:39:56,420 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:39:56,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:39:56,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222072595] [2019-10-13 21:39:56,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:39:56,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:56,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:39:56,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:39:56,422 INFO L87 Difference]: Start difference. First operand 467 states and 799 transitions. Second operand 3 states. [2019-10-13 21:39:56,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:56,869 INFO L93 Difference]: Finished difference Result 1310 states and 2339 transitions. [2019-10-13 21:39:56,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:39:56,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-13 21:39:56,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:56,880 INFO L225 Difference]: With dead ends: 1310 [2019-10-13 21:39:56,880 INFO L226 Difference]: Without dead ends: 848 [2019-10-13 21:39:56,884 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 21:39:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2019-10-13 21:39:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2019-10-13 21:39:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2019-10-13 21:39:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1398 transitions. [2019-10-13 21:39:56,956 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1398 transitions. Word has length 94 [2019-10-13 21:39:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:56,957 INFO L462 AbstractCegarLoop]: Abstraction has 848 states and 1398 transitions. [2019-10-13 21:39:56,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:39:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1398 transitions. [2019-10-13 21:39:56,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:39:56,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:56,975 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 21:39:56,975 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1929504678, now seen corresponding path program 1 times [2019-10-13 21:39:56,975 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:56,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278530554] [2019-10-13 21:39:56,976 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:56,976 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:56,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:57,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278530554] [2019-10-13 21:39:57,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109225743] [2019-10-13 21:39:57,123 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 21:39:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:57,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:39:57,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:39:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 21:39:57,344 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:39:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 21:39:57,412 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:39:57,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-13 21:39:57,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113136670] [2019-10-13 21:39:57,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:39:57,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:39:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:39:57,414 INFO L87 Difference]: Start difference. First operand 848 states and 1398 transitions. Second operand 3 states. [2019-10-13 21:39:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:57,860 INFO L93 Difference]: Finished difference Result 2378 states and 4057 transitions. [2019-10-13 21:39:57,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:39:57,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 113 [2019-10-13 21:39:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:57,874 INFO L225 Difference]: With dead ends: 2378 [2019-10-13 21:39:57,874 INFO L226 Difference]: Without dead ends: 1535 [2019-10-13 21:39:57,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:39:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2019-10-13 21:39:57,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2019-10-13 21:39:57,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2019-10-13 21:39:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2507 transitions. [2019-10-13 21:39:57,950 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2507 transitions. Word has length 113 [2019-10-13 21:39:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:57,951 INFO L462 AbstractCegarLoop]: Abstraction has 1535 states and 2507 transitions. [2019-10-13 21:39:57,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:39:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2507 transitions. [2019-10-13 21:39:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 21:39:57,958 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:57,958 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:39:58,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:39:58,163 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash 719784990, now seen corresponding path program 1 times [2019-10-13 21:39:58,163 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:58,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103818968] [2019-10-13 21:39:58,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:58,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:58,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:58,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103818968] [2019-10-13 21:39:58,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713030161] [2019-10-13 21:39:58,336 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 21:39:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:58,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:39:58,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:39:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:58,479 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:39:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:58,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972102659] [2019-10-13 21:39:58,609 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-13 21:39:58,610 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:39:58,616 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:39:58,629 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:39:58,629 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:39:58,950 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 102 for LOIs [2019-10-13 21:39:59,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:39:59,424 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 21:39:59,442 INFO L168 Benchmark]: Toolchain (without parser) took 8742.89 ms. Allocated memory was 138.4 MB in the beginning and 331.9 MB in the end (delta: 193.5 MB). Free memory was 100.6 MB in the beginning and 286.9 MB in the end (delta: -186.3 MB). Peak memory consumption was 7.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:39:59,445 INFO L168 Benchmark]: CDTParser took 1.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:39:59,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 716.81 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 100.4 MB in the beginning and 172.4 MB in the end (delta: -72.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:39:59,448 INFO L168 Benchmark]: Boogie Preprocessor took 115.43 ms. Allocated memory is still 205.5 MB. Free memory was 172.4 MB in the beginning and 166.7 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:39:59,452 INFO L168 Benchmark]: RCFGBuilder took 1982.98 ms. Allocated memory was 205.5 MB in the beginning and 252.2 MB in the end (delta: 46.7 MB). Free memory was 166.7 MB in the beginning and 215.0 MB in the end (delta: -48.2 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:39:59,459 INFO L168 Benchmark]: TraceAbstraction took 5920.07 ms. Allocated memory was 252.2 MB in the beginning and 331.9 MB in the end (delta: 79.7 MB). Free memory was 215.0 MB in the beginning and 286.9 MB in the end (delta: -71.9 MB). Peak memory consumption was 7.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:39:59,468 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.22 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 716.81 ms. Allocated memory was 138.4 MB in the beginning and 205.5 MB in the end (delta: 67.1 MB). Free memory was 100.4 MB in the beginning and 172.4 MB in the end (delta: -72.0 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.43 ms. Allocated memory is still 205.5 MB. Free memory was 172.4 MB in the beginning and 166.7 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1982.98 ms. Allocated memory was 205.5 MB in the beginning and 252.2 MB in the end (delta: 46.7 MB). Free memory was 166.7 MB in the beginning and 215.0 MB in the end (delta: -48.2 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5920.07 ms. Allocated memory was 252.2 MB in the beginning and 331.9 MB in the end (delta: 79.7 MB). Free memory was 215.0 MB in the beginning and 286.9 MB in the end (delta: -71.9 MB). Peak memory consumption was 7.8 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...