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/Problem16_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:54:14,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:54:14,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:54:14,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:54:14,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:54:14,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:54:14,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:54:14,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:54:14,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:54:14,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:54:14,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:54:14,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:54:14,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:54:14,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:54:14,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:54:14,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:54:14,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:54:14,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:54:14,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:54:14,402 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:54:14,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:54:14,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:54:14,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:54:14,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:54:14,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:54:14,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:54:14,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:54:14,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:54:14,431 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 21:54:14,457 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:54:14,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:54:14,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:54:14,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:54:14,459 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:54:14,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:54:14,460 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:54:14,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:54:14,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:54:14,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:54:14,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:54:14,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:54:14,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:54:14,463 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:54:14,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:54:14,463 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:54:14,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:54:14,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:54:14,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:54:14,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:54:14,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:54:14,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:54:14,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:54:14,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:54:14,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:54:14,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:54:14,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:54:14,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:54:14,466 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 21:54:14,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:54:14,789 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:54:14,792 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:54:14,794 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:54:14,794 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:54:14,795 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-13 21:54:14,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8584a685/ed1206f86e874c07bf0fadadd211b720/FLAGb849968be [2019-10-13 21:54:15,558 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:54:15,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-13 21:54:15,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8584a685/ed1206f86e874c07bf0fadadd211b720/FLAGb849968be [2019-10-13 21:54:15,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8584a685/ed1206f86e874c07bf0fadadd211b720 [2019-10-13 21:54:15,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:54:15,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:54:15,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:54:15,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:54:15,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:54:15,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:15" (1/1) ... [2019-10-13 21:54:15,748 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:15, skipping insertion in model container [2019-10-13 21:54:15,748 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:15" (1/1) ... [2019-10-13 21:54:15,756 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:54:15,834 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:54:16,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:54:16,639 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:54:16,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:54:16,889 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:54:16,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16 WrapperNode [2019-10-13 21:54:16,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:54:16,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:54:16,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:54:16,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:54:16,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:16,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:16,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:16,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:16,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:17,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:17,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (1/1) ... [2019-10-13 21:54:17,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:54:17,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:54:17,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:54:17,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:54:17,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (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 21:54:17,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:54:17,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:54:17,115 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:54:17,115 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:54:17,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:54:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:54:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:54:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:54:17,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:54:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:54:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:54:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:54:17,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:54:34,987 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:54:34,988 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:54:34,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:34 BoogieIcfgContainer [2019-10-13 21:54:34,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:54:34,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:54:34,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:54:34,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:54:34,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:54:15" (1/3) ... [2019-10-13 21:54:34,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:34, skipping insertion in model container [2019-10-13 21:54:34,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:16" (2/3) ... [2019-10-13 21:54:34,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4686fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:34, skipping insertion in model container [2019-10-13 21:54:34,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:34" (3/3) ... [2019-10-13 21:54:34,998 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label53.c [2019-10-13 21:54:35,007 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:54:35,016 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:54:35,027 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:54:35,055 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:54:35,055 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:54:35,055 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:54:35,055 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:54:35,055 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:54:35,056 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:54:35,056 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:54:35,056 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:54:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:54:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:54:35,086 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:35,087 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:35,088 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 863562303, now seen corresponding path program 1 times [2019-10-13 21:54:35,100 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:35,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468379560] [2019-10-13 21:54:35,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:35,101 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:35,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:35,302 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 21:54:35,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468379560] [2019-10-13 21:54:35,303 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:35,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:54:35,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411784565] [2019-10-13 21:54:35,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:54:35,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:54:35,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:35,326 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-13 21:54:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:37,068 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-13 21:54:37,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:54:37,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:54:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:37,090 INFO L225 Difference]: With dead ends: 718 [2019-10-13 21:54:37,090 INFO L226 Difference]: Without dead ends: 471 [2019-10-13 21:54:37,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 21:54:37,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-13 21:54:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 455. [2019-10-13 21:54:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-10-13 21:54:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 857 transitions. [2019-10-13 21:54:37,185 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 857 transitions. Word has length 11 [2019-10-13 21:54:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:37,185 INFO L462 AbstractCegarLoop]: Abstraction has 455 states and 857 transitions. [2019-10-13 21:54:37,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:54:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 857 transitions. [2019-10-13 21:54:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 21:54:37,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:37,188 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:37,188 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:37,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash 328286237, now seen corresponding path program 1 times [2019-10-13 21:54:37,189 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:37,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2152333] [2019-10-13 21:54:37,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:37,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:37,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:37,366 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2152333] [2019-10-13 21:54:37,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:37,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:54:37,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308155535] [2019-10-13 21:54:37,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:37,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:37,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:54:37,372 INFO L87 Difference]: Start difference. First operand 455 states and 857 transitions. Second operand 5 states. [2019-10-13 21:54:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:39,636 INFO L93 Difference]: Finished difference Result 1369 states and 2614 transitions. [2019-10-13 21:54:39,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:39,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-13 21:54:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:39,649 INFO L225 Difference]: With dead ends: 1369 [2019-10-13 21:54:39,649 INFO L226 Difference]: Without dead ends: 919 [2019-10-13 21:54:39,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:54:39,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2019-10-13 21:54:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 879. [2019-10-13 21:54:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2019-10-13 21:54:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1570 transitions. [2019-10-13 21:54:39,711 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1570 transitions. Word has length 21 [2019-10-13 21:54:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:39,711 INFO L462 AbstractCegarLoop]: Abstraction has 879 states and 1570 transitions. [2019-10-13 21:54:39,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:39,712 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1570 transitions. [2019-10-13 21:54:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 21:54:39,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:39,713 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:54:39,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 7530234, now seen corresponding path program 1 times [2019-10-13 21:54:39,714 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:39,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287537820] [2019-10-13 21:54:39,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:39,715 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:39,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:39,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287537820] [2019-10-13 21:54:39,893 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:39,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:54:39,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543307762] [2019-10-13 21:54:39,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:54:39,894 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:54:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:54:39,895 INFO L87 Difference]: Start difference. First operand 879 states and 1570 transitions. Second operand 6 states. [2019-10-13 21:54:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:42,779 INFO L93 Difference]: Finished difference Result 2455 states and 4487 transitions. [2019-10-13 21:54:42,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:42,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2019-10-13 21:54:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:42,792 INFO L225 Difference]: With dead ends: 2455 [2019-10-13 21:54:42,792 INFO L226 Difference]: Without dead ends: 1581 [2019-10-13 21:54:42,795 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 21:54:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2019-10-13 21:54:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1560. [2019-10-13 21:54:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1560 states. [2019-10-13 21:54:42,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2706 transitions. [2019-10-13 21:54:42,855 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2706 transitions. Word has length 50 [2019-10-13 21:54:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:42,856 INFO L462 AbstractCegarLoop]: Abstraction has 1560 states and 2706 transitions. [2019-10-13 21:54:42,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:54:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2706 transitions. [2019-10-13 21:54:42,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 21:54:42,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:42,859 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-13 21:54:42,859 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:42,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:42,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1468030219, now seen corresponding path program 1 times [2019-10-13 21:54:42,860 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:42,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677067465] [2019-10-13 21:54:42,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:42,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:42,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:43,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677067465] [2019-10-13 21:54:43,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576580883] [2019-10-13 21:54:43,001 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 21:54:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:43,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:43,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:43,211 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:43,303 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:43,303 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:43,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:43,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554460369] [2019-10-13 21:54:43,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:43,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:43,305 INFO L87 Difference]: Start difference. First operand 1560 states and 2706 transitions. Second operand 5 states. [2019-10-13 21:54:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:45,532 INFO L93 Difference]: Finished difference Result 3811 states and 6632 transitions. [2019-10-13 21:54:45,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:54:45,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 21:54:45,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:45,551 INFO L225 Difference]: With dead ends: 3811 [2019-10-13 21:54:45,551 INFO L226 Difference]: Without dead ends: 2256 [2019-10-13 21:54:45,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:54:45,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2019-10-13 21:54:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2222. [2019-10-13 21:54:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2222 states. [2019-10-13 21:54:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 3220 transitions. [2019-10-13 21:54:45,642 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 3220 transitions. Word has length 63 [2019-10-13 21:54:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:45,642 INFO L462 AbstractCegarLoop]: Abstraction has 2222 states and 3220 transitions. [2019-10-13 21:54:45,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 3220 transitions. [2019-10-13 21:54:45,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 21:54:45,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:45,652 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:54:45,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:45,857 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1765916849, now seen corresponding path program 1 times [2019-10-13 21:54:45,859 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:45,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721925146] [2019-10-13 21:54:45,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:45,860 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:45,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:45,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721925146] [2019-10-13 21:54:45,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341225018] [2019-10-13 21:54:45,993 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 21:54:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:46,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:46,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:46,132 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:46,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:46,215 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:46,215 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019695290] [2019-10-13 21:54:46,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:46,217 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:46,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:46,218 INFO L87 Difference]: Start difference. First operand 2222 states and 3220 transitions. Second operand 5 states. [2019-10-13 21:54:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:50,452 INFO L93 Difference]: Finished difference Result 5177 states and 7563 transitions. [2019-10-13 21:54:50,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:54:50,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2019-10-13 21:54:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:50,475 INFO L225 Difference]: With dead ends: 5177 [2019-10-13 21:54:50,475 INFO L226 Difference]: Without dead ends: 2960 [2019-10-13 21:54:50,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:54:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2019-10-13 21:54:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2907. [2019-10-13 21:54:50,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2907 states. [2019-10-13 21:54:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4097 transitions. [2019-10-13 21:54:50,569 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4097 transitions. Word has length 85 [2019-10-13 21:54:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:50,571 INFO L462 AbstractCegarLoop]: Abstraction has 2907 states and 4097 transitions. [2019-10-13 21:54:50,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4097 transitions. [2019-10-13 21:54:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:54:50,575 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:50,576 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:50,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:50,781 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash 357958041, now seen corresponding path program 1 times [2019-10-13 21:54:50,782 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:50,782 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808701358] [2019-10-13 21:54:50,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:50,783 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:50,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:54:50,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808701358] [2019-10-13 21:54:50,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806923581] [2019-10-13 21:54:50,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:50,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:54:50,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:51,018 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:54:51,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837718272] [2019-10-13 21:54:51,109 INFO L162 IcfgInterpreter]: Started Sifa with 64 locations of interest [2019-10-13 21:54:51,109 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:54:51,115 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:54:51,121 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:54:51,121 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:54:51,343 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-13 21:54:51,478 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2019-10-13 21:54:51,594 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2019-10-13 21:54:51,685 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2019-10-13 21:54:51,769 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2019-10-13 21:54:52,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:52,101 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 21:54:52,110 INFO L168 Benchmark]: Toolchain (without parser) took 36370.68 ms. Allocated memory was 146.3 MB in the beginning and 470.3 MB in the end (delta: 324.0 MB). Free memory was 97.6 MB in the beginning and 251.1 MB in the end (delta: -153.5 MB). Peak memory consumption was 170.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:52,114 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:54:52,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1150.22 ms. Allocated memory was 146.3 MB in the beginning and 206.0 MB in the end (delta: 59.8 MB). Free memory was 97.4 MB in the beginning and 130.4 MB in the end (delta: -33.0 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:52,116 INFO L168 Benchmark]: Boogie Preprocessor took 166.16 ms. Allocated memory is still 206.0 MB. Free memory was 130.4 MB in the beginning and 119.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:52,121 INFO L168 Benchmark]: RCFGBuilder took 17932.46 ms. Allocated memory was 206.0 MB in the beginning and 319.8 MB in the end (delta: 113.8 MB). Free memory was 119.4 MB in the beginning and 247.0 MB in the end (delta: -127.6 MB). Peak memory consumption was 131.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:52,122 INFO L168 Benchmark]: TraceAbstraction took 17117.23 ms. Allocated memory was 319.8 MB in the beginning and 470.3 MB in the end (delta: 150.5 MB). Free memory was 247.0 MB in the beginning and 251.1 MB in the end (delta: -4.1 MB). Peak memory consumption was 146.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:52,131 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 146.3 MB. Free memory was 121.4 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1150.22 ms. Allocated memory was 146.3 MB in the beginning and 206.0 MB in the end (delta: 59.8 MB). Free memory was 97.4 MB in the beginning and 130.4 MB in the end (delta: -33.0 MB). Peak memory consumption was 34.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 166.16 ms. Allocated memory is still 206.0 MB. Free memory was 130.4 MB in the beginning and 119.4 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 17932.46 ms. Allocated memory was 206.0 MB in the beginning and 319.8 MB in the end (delta: 113.8 MB). Free memory was 119.4 MB in the beginning and 247.0 MB in the end (delta: -127.6 MB). Peak memory consumption was 131.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17117.23 ms. Allocated memory was 319.8 MB in the beginning and 470.3 MB in the end (delta: 150.5 MB). Free memory was 247.0 MB in the beginning and 251.1 MB in the end (delta: -4.1 MB). Peak memory consumption was 146.4 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...