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/Problem18_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:46:09,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:46:09,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:46:09,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:46:09,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:46:09,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:46:09,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:46:09,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:46:09,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:46:09,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:46:09,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:46:09,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 03:46:09,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:46:09,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:46:09,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:46:09,389 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:46:09,390 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:46:09,391 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:46:09,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:46:09,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:46:09,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:46:09,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:46:09,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:46:09,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:46:09,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:46:09,409 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:46:09,410 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:46:09,411 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:46:09,412 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 [2019-10-07 03:46:09,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:46:09,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:46:09,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:46:09,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:46:09,429 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:46:09,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:46:09,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:46:09,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:46:09,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:46:09,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:46:09,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:46:09,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:46:09,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:46:09,431 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:46:09,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:46:09,432 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:46:09,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:46:09,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:46:09,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:46:09,432 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:46:09,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:46:09,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:46:09,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:46:09,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:46:09,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:46:09,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:46:09,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:46:09,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:46:09,434 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 [2019-10-07 03:46:09,759 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:46:09,773 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:46:09,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:46:09,778 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:46:09,779 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:46:09,780 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-10-07 03:46:09,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/942725d0f/604cbd492864497b983f8a8edf2c8ba7/FLAG095a4207a [2019-10-07 03:46:10,539 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:46:10,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-10-07 03:46:10,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/942725d0f/604cbd492864497b983f8a8edf2c8ba7/FLAG095a4207a [2019-10-07 03:46:10,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/942725d0f/604cbd492864497b983f8a8edf2c8ba7 [2019-10-07 03:46:10,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:46:10,707 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:46:10,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:46:10,710 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:46:10,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:46:10,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:46:10" (1/1) ... [2019-10-07 03:46:10,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92df964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:10, skipping insertion in model container [2019-10-07 03:46:10,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:46:10" (1/1) ... [2019-10-07 03:46:10,728 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:46:10,864 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:46:12,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:46:12,264 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:46:12,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:46:12,834 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:46:12,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12 WrapperNode [2019-10-07 03:46:12,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:46:12,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:46:12,837 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:46:12,837 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:46:12,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:12,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:12,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:12,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:13,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:13,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:13,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (1/1) ... [2019-10-07 03:46:13,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:46:13,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:46:13,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:46:13,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:46:13,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (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 [2019-10-07 03:46:13,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:46:13,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:46:13,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:46:13,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:46:13,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 03:46:13,199 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:46:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:46:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:46:13,200 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 03:46:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:46:13,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:46:13,202 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:46:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:46:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:46:13,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:48:01,706 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:48:01,707 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:48:01,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:48:01 BoogieIcfgContainer [2019-10-07 03:48:01,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:48:01,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:48:01,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:48:01,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:48:01,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:46:10" (1/3) ... [2019-10-07 03:48:01,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383ff9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:48:01, skipping insertion in model container [2019-10-07 03:48:01,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:46:12" (2/3) ... [2019-10-07 03:48:01,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@383ff9a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:48:01, skipping insertion in model container [2019-10-07 03:48:01,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:48:01" (3/3) ... [2019-10-07 03:48:01,718 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-10-07 03:48:01,731 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:48:01,740 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:48:01,755 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:48:01,789 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:48:01,789 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:48:01,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:48:01,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:48:01,790 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:48:01,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:48:01,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:48:01,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:48:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2019-10-07 03:48:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:48:01,827 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:01,828 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:01,830 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:01,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:01,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1816952486, now seen corresponding path program 1 times [2019-10-07 03:48:01,845 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:01,845 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:01,846 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:01,846 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:02,081 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:02,082 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:02,083 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:48:02,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:48:02,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:48:02,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:48:02,104 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 3 states. [2019-10-07 03:48:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:05,725 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2019-10-07 03:48:05,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:48:05,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:48:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:05,754 INFO L225 Difference]: With dead ends: 1393 [2019-10-07 03:48:05,754 INFO L226 Difference]: Without dead ends: 921 [2019-10-07 03:48:05,765 INFO L606 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 [2019-10-07 03:48:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2019-10-07 03:48:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 890. [2019-10-07 03:48:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 890 states. [2019-10-07 03:48:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1719 transitions. [2019-10-07 03:48:05,888 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1719 transitions. Word has length 11 [2019-10-07 03:48:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:05,889 INFO L462 AbstractCegarLoop]: Abstraction has 890 states and 1719 transitions. [2019-10-07 03:48:05,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:48:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1719 transitions. [2019-10-07 03:48:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-07 03:48:05,891 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:05,891 INFO L385 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] [2019-10-07 03:48:05,892 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -735743411, now seen corresponding path program 1 times [2019-10-07 03:48:05,893 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:05,893 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:05,893 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:05,893 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:06,080 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:06,085 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:06,085 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:48:06,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:48:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:48:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:48:06,088 INFO L87 Difference]: Start difference. First operand 890 states and 1719 transitions. Second operand 6 states. [2019-10-07 03:48:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:10,153 INFO L93 Difference]: Finished difference Result 2694 states and 5243 transitions. [2019-10-07 03:48:10,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:10,155 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-07 03:48:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:10,175 INFO L225 Difference]: With dead ends: 2694 [2019-10-07 03:48:10,175 INFO L226 Difference]: Without dead ends: 1809 [2019-10-07 03:48:10,179 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2019-10-07 03:48:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1789. [2019-10-07 03:48:10,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1789 states. [2019-10-07 03:48:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 3102 transitions. [2019-10-07 03:48:10,274 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 3102 transitions. Word has length 26 [2019-10-07 03:48:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:10,275 INFO L462 AbstractCegarLoop]: Abstraction has 1789 states and 3102 transitions. [2019-10-07 03:48:10,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:48:10,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 3102 transitions. [2019-10-07 03:48:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-07 03:48:10,277 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:10,277 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:10,278 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 546754209, now seen corresponding path program 1 times [2019-10-07 03:48:10,279 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:10,279 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:10,279 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:10,280 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:10,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:10,384 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:10,384 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:10,384 INFO L95 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 [2019-10-07 03:48:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:10,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:48:10,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:48:10,577 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:48:10,650 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:48:10,650 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-07 03:48:10,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:48:10,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:48:10,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:10,652 INFO L87 Difference]: Start difference. First operand 1789 states and 3102 transitions. Second operand 5 states. [2019-10-07 03:48:15,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:15,034 INFO L93 Difference]: Finished difference Result 5420 states and 9628 transitions. [2019-10-07 03:48:15,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:15,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-07 03:48:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:15,066 INFO L225 Difference]: With dead ends: 5420 [2019-10-07 03:48:15,066 INFO L226 Difference]: Without dead ends: 3636 [2019-10-07 03:48:15,074 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-07 03:48:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2019-10-07 03:48:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 3580. [2019-10-07 03:48:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3580 states. [2019-10-07 03:48:15,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 6079 transitions. [2019-10-07 03:48:15,523 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 6079 transitions. Word has length 38 [2019-10-07 03:48:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:15,524 INFO L462 AbstractCegarLoop]: Abstraction has 3580 states and 6079 transitions. [2019-10-07 03:48:15,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:48:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 6079 transitions. [2019-10-07 03:48:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-07 03:48:15,526 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:15,527 INFO L385 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] [2019-10-07 03:48:15,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:15,732 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:15,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1996727819, now seen corresponding path program 1 times [2019-10-07 03:48:15,733 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:15,733 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:15,733 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:15,733 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:15,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:15,901 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:15,901 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:15,901 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:48:15,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:48:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:48:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:48:15,903 INFO L87 Difference]: Start difference. First operand 3580 states and 6079 transitions. Second operand 6 states. [2019-10-07 03:48:19,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:19,646 INFO L93 Difference]: Finished difference Result 8533 states and 14580 transitions. [2019-10-07 03:48:19,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:48:19,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2019-10-07 03:48:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:19,675 INFO L225 Difference]: With dead ends: 8533 [2019-10-07 03:48:19,676 INFO L226 Difference]: Without dead ends: 4958 [2019-10-07 03:48:19,687 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:19,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4958 states. [2019-10-07 03:48:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4958 to 3956. [2019-10-07 03:48:19,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3956 states. [2019-10-07 03:48:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3956 states to 3956 states and 6015 transitions. [2019-10-07 03:48:19,853 INFO L78 Accepts]: Start accepts. Automaton has 3956 states and 6015 transitions. Word has length 38 [2019-10-07 03:48:19,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:19,854 INFO L462 AbstractCegarLoop]: Abstraction has 3956 states and 6015 transitions. [2019-10-07 03:48:19,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:48:19,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3956 states and 6015 transitions. [2019-10-07 03:48:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-07 03:48:19,865 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:19,865 INFO L385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:19,866 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1478419274, now seen corresponding path program 1 times [2019-10-07 03:48:19,867 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:19,867 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:19,867 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:19,867 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:20,334 WARN L191 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 4 [2019-10-07 03:48:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:20,371 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:20,371 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:20,372 INFO L95 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 [2019-10-07 03:48:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:20,462 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:48:20,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:20,508 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:48:20,553 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 03:48:20,554 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-07 03:48:20,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:48:20,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:48:20,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:20,556 INFO L87 Difference]: Start difference. First operand 3956 states and 6015 transitions. Second operand 4 states. [2019-10-07 03:48:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:24,478 INFO L93 Difference]: Finished difference Result 10093 states and 15288 transitions. [2019-10-07 03:48:24,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:48:24,490 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-07 03:48:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:24,523 INFO L225 Difference]: With dead ends: 10093 [2019-10-07 03:48:24,523 INFO L226 Difference]: Without dead ends: 6142 [2019-10-07 03:48:24,537 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6142 states. [2019-10-07 03:48:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6142 to 4855. [2019-10-07 03:48:24,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4855 states. [2019-10-07 03:48:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4855 states to 4855 states and 6741 transitions. [2019-10-07 03:48:24,977 INFO L78 Accepts]: Start accepts. Automaton has 4855 states and 6741 transitions. Word has length 63 [2019-10-07 03:48:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:24,980 INFO L462 AbstractCegarLoop]: Abstraction has 4855 states and 6741 transitions. [2019-10-07 03:48:24,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:48:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 4855 states and 6741 transitions. [2019-10-07 03:48:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-07 03:48:24,982 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:24,982 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 03:48:25,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:25,187 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:25,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1501143826, now seen corresponding path program 1 times [2019-10-07 03:48:25,188 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:25,188 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:25,188 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:25,188 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 03:48:25,353 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:25,353 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:25,353 INFO L95 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 [2019-10-07 03:48:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:25,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:48:25,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-07 03:48:25,498 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 03:48:25,575 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:48:25,575 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-07 03:48:25,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:48:25,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:48:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:48:25,578 INFO L87 Difference]: Start difference. First operand 4855 states and 6741 transitions. Second operand 5 states. [2019-10-07 03:48:30,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:30,051 INFO L93 Difference]: Finished difference Result 13880 states and 19523 transitions. [2019-10-07 03:48:30,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:48:30,052 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-07 03:48:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:30,095 INFO L225 Difference]: With dead ends: 13880 [2019-10-07 03:48:30,096 INFO L226 Difference]: Without dead ends: 9030 [2019-10-07 03:48:30,112 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-07 03:48:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2019-10-07 03:48:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 8238. [2019-10-07 03:48:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8238 states. [2019-10-07 03:48:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8238 states to 8238 states and 10880 transitions. [2019-10-07 03:48:32,949 INFO L78 Accepts]: Start accepts. Automaton has 8238 states and 10880 transitions. Word has length 69 [2019-10-07 03:48:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:32,950 INFO L462 AbstractCegarLoop]: Abstraction has 8238 states and 10880 transitions. [2019-10-07 03:48:32,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:48:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 8238 states and 10880 transitions. [2019-10-07 03:48:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-07 03:48:32,951 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:32,952 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:33,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:33,157 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 742068926, now seen corresponding path program 1 times [2019-10-07 03:48:33,157 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:33,157 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:33,158 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:33,158 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-07 03:48:33,279 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:33,279 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:48:33,279 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:48:33,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:48:33,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:48:33,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:48:33,280 INFO L87 Difference]: Start difference. First operand 8238 states and 10880 transitions. Second operand 4 states. [2019-10-07 03:48:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:48:40,166 INFO L93 Difference]: Finished difference Result 23861 states and 32753 transitions. [2019-10-07 03:48:40,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:48:40,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-10-07 03:48:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:48:40,507 INFO L225 Difference]: With dead ends: 23861 [2019-10-07 03:48:40,507 INFO L226 Difference]: Without dead ends: 15628 [2019-10-07 03:48:40,529 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:48:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15628 states. [2019-10-07 03:48:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15628 to 15222. [2019-10-07 03:48:40,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15222 states. [2019-10-07 03:48:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15222 states to 15222 states and 20266 transitions. [2019-10-07 03:48:40,879 INFO L78 Accepts]: Start accepts. Automaton has 15222 states and 20266 transitions. Word has length 87 [2019-10-07 03:48:40,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:48:40,880 INFO L462 AbstractCegarLoop]: Abstraction has 15222 states and 20266 transitions. [2019-10-07 03:48:40,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:48:40,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15222 states and 20266 transitions. [2019-10-07 03:48:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-07 03:48:40,911 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:48:40,911 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:48:40,911 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:48:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:48:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1221628934, now seen corresponding path program 1 times [2019-10-07 03:48:40,912 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:48:40,913 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:40,913 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:40,913 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:48:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:48:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-07 03:48:41,201 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:48:41,202 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:48:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:48:41,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:48:41,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:48:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:48:41,482 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:48:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-10-07 03:48:41,643 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:48:41,694 INFO L162 IcfgInterpreter]: Started Sifa with 236 locations of interest [2019-10-07 03:48:41,694 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:48:41,707 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:48:41,716 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:48:41,717 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:48:41,896 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-07 03:48:42,339 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-10-07 03:48:42,934 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 43 [2019-10-07 03:48:43,172 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-10-07 03:48:43,205 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 18 [2019-10-07 03:48:43,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:48:43,498 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) 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:99) 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:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 03:48:43,505 INFO L168 Benchmark]: Toolchain (without parser) took 152797.73 ms. Allocated memory was 136.8 MB in the beginning and 1.3 GB in the end (delta: 1.1 GB). Free memory was 91.8 MB in the beginning and 814.9 MB in the end (delta: -723.1 MB). Peak memory consumption was 401.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:43,506 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory is still 119.7 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 03:48:43,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2125.62 ms. Allocated memory was 136.8 MB in the beginning and 239.6 MB in the end (delta: 102.8 MB). Free memory was 91.8 MB in the beginning and 179.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 91.6 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:43,510 INFO L168 Benchmark]: Boogie Preprocessor took 279.16 ms. Allocated memory is still 239.6 MB. Free memory was 179.0 MB in the beginning and 158.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:43,513 INFO L168 Benchmark]: RCFGBuilder took 108593.20 ms. Allocated memory was 239.6 MB in the beginning and 736.6 MB in the end (delta: 497.0 MB). Free memory was 158.4 MB in the beginning and 73.6 MB in the end (delta: 84.8 MB). Peak memory consumption was 581.8 MB. Max. memory is 7.1 GB. [2019-10-07 03:48:43,514 INFO L168 Benchmark]: TraceAbstraction took 41792.30 ms. Allocated memory was 736.6 MB in the beginning and 1.3 GB in the end (delta: 524.8 MB). Free memory was 73.6 MB in the beginning and 814.9 MB in the end (delta: -741.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 03:48:43,522 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory is still 119.7 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2125.62 ms. Allocated memory was 136.8 MB in the beginning and 239.6 MB in the end (delta: 102.8 MB). Free memory was 91.8 MB in the beginning and 179.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 91.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 279.16 ms. Allocated memory is still 239.6 MB. Free memory was 179.0 MB in the beginning and 158.4 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 108593.20 ms. Allocated memory was 239.6 MB in the beginning and 736.6 MB in the end (delta: 497.0 MB). Free memory was 158.4 MB in the beginning and 73.6 MB in the end (delta: 84.8 MB). Peak memory consumption was 581.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 41792.30 ms. Allocated memory was 736.6 MB in the beginning and 1.3 GB in the end (delta: 524.8 MB). Free memory was 73.6 MB in the beginning and 814.9 MB in the end (delta: -741.3 MB). There was no memory consumed. 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:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...