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_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:54:01,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:54:01,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:54:01,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:54:01,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:54:01,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:54:01,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:54:01,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:54:01,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:54:01,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:54:01,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:54:01,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:54:01,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:54:01,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:54:01,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:54:01,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:54:01,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:54:01,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:54:01,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:54:01,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:54:01,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:54:01,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:54:01,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:54:01,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:54:01,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:54:01,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:54:01,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:54:01,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:54:01,818 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 21:54:01,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:54:01,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:54:01,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:54:01,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:54:01,834 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:54:01,834 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:54:01,834 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:54:01,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:54:01,835 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:54:01,835 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:54:01,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:54:01,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:54:01,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:54:01,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:54:01,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:54:01,836 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:54:01,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:54:01,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:54:01,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:54:01,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:54:01,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:54:01,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:54:01,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:54:01,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:54:01,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:54:01,840 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:54:01,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:54:01,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:54:01,840 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 21:54:02,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:54:02,123 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:54:02,126 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:54:02,128 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:54:02,128 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:54:02,129 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-13 21:54:02,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fe152d1/cf770bf605594d22b7c8fd43ef4b4174/FLAG8f2d55603 [2019-10-13 21:54:02,872 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:54:02,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-13 21:54:02,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fe152d1/cf770bf605594d22b7c8fd43ef4b4174/FLAG8f2d55603 [2019-10-13 21:54:03,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fe152d1/cf770bf605594d22b7c8fd43ef4b4174 [2019-10-13 21:54:03,069 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:54:03,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:54:03,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:54:03,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:54:03,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:54:03,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:03" (1/1) ... [2019-10-13 21:54:03,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12227321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:03, skipping insertion in model container [2019-10-13 21:54:03,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:03" (1/1) ... [2019-10-13 21:54:03,089 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:54:03,175 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:54:04,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:54:04,147 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:54:04,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:54:04,471 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:54:04,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04 WrapperNode [2019-10-13 21:54:04,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:54:04,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:54:04,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:54:04,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:54:04,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,600 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (1/1) ... [2019-10-13 21:54:04,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:54:04,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:54:04,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:54:04,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:54:04,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (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 21:54:04,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:54:04,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:54:04,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:54:04,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:54:04,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:54:04,732 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:54:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:54:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:54:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:54:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:54:04,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:54:04,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:54:04,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:54:19,983 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:54:19,984 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:54:19,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:19 BoogieIcfgContainer [2019-10-13 21:54:19,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:54:19,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:54:19,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:54:19,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:54:19,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:54:03" (1/3) ... [2019-10-13 21:54:19,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7506c2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:19, skipping insertion in model container [2019-10-13 21:54:19,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:04" (2/3) ... [2019-10-13 21:54:19,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7506c2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:19, skipping insertion in model container [2019-10-13 21:54:19,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:19" (3/3) ... [2019-10-13 21:54:19,997 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-10-13 21:54:20,010 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:54:20,020 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:54:20,031 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:54:20,069 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:54:20,069 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:54:20,069 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:54:20,069 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:54:20,069 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:54:20,069 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:54:20,069 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:54:20,070 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:54:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:54:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:54:20,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:20,101 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:20,102 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:20,107 INFO L82 PathProgramCache]: Analyzing trace with hash 863568959, now seen corresponding path program 1 times [2019-10-13 21:54:20,117 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:20,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697251789] [2019-10-13 21:54:20,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:20,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:20,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:20,366 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 21:54:20,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697251789] [2019-10-13 21:54:20,367 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:20,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:54:20,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307113473] [2019-10-13 21:54:20,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:54:20,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:20,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:54:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:20,389 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-13 21:54:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:22,137 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-13 21:54:22,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:54:22,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:54:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:22,164 INFO L225 Difference]: With dead ends: 718 [2019-10-13 21:54:22,165 INFO L226 Difference]: Without dead ends: 471 [2019-10-13 21:54:22,173 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-13 21:54:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-13 21:54:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-13 21:54:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-13 21:54:22,267 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-13 21:54:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:22,268 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-13 21:54:22,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:54:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-13 21:54:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 21:54:22,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:22,271 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] [2019-10-13 21:54:22,272 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash -98068442, now seen corresponding path program 1 times [2019-10-13 21:54:22,272 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:22,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830812305] [2019-10-13 21:54:22,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:22,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:22,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:22,467 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 21:54:22,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830812305] [2019-10-13 21:54:22,468 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:22,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:54:22,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994955477] [2019-10-13 21:54:22,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:54:22,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:54:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:54:22,472 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-13 21:54:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:26,761 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-13 21:54:26,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:26,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-13 21:54:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:26,774 INFO L225 Difference]: With dead ends: 1390 [2019-10-13 21:54:26,774 INFO L226 Difference]: Without dead ends: 933 [2019-10-13 21:54:26,779 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 21:54:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-13 21:54:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-13 21:54:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-13 21:54:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-13 21:54:26,845 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-13 21:54:26,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:26,846 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-13 21:54:26,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:54:26,846 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-13 21:54:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:54:26,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:26,853 INFO L380 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, 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] [2019-10-13 21:54:26,853 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1543535517, now seen corresponding path program 1 times [2019-10-13 21:54:26,855 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:26,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734830098] [2019-10-13 21:54:26,856 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:26,856 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:26,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:26,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734830098] [2019-10-13 21:54:26,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303749180] [2019-10-13 21:54:26,998 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 21:54:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:27,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:27,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:27,227 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:27,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:27,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:27,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083058739] [2019-10-13 21:54:27,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:27,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:27,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:27,341 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-13 21:54:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:29,678 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-13 21:54:29,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:29,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-13 21:54:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:29,684 INFO L225 Difference]: With dead ends: 2074 [2019-10-13 21:54:29,684 INFO L226 Difference]: Without dead ends: 1162 [2019-10-13 21:54:29,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:54:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-13 21:54:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-13 21:54:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-13 21:54:29,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-13 21:54:29,724 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-13 21:54:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:29,725 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-13 21:54:29,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-13 21:54:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 21:54:29,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:29,728 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:29,931 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:29,932 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 132680533, now seen corresponding path program 1 times [2019-10-13 21:54:29,933 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:29,933 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135599283] [2019-10-13 21:54:29,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:29,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:29,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:30,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135599283] [2019-10-13 21:54:30,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524936708] [2019-10-13 21:54:30,088 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 21:54:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:30,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:30,210 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:54:30,242 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:30,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:30,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 21:54:30,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231534510] [2019-10-13 21:54:30,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:30,308 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:30,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:54:30,309 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-13 21:54:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:32,932 INFO L93 Difference]: Finished difference Result 3270 states and 5830 transitions. [2019-10-13 21:54:32,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:54:32,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-13 21:54:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:32,953 INFO L225 Difference]: With dead ends: 3270 [2019-10-13 21:54:32,954 INFO L226 Difference]: Without dead ends: 2123 [2019-10-13 21:54:32,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:54:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2019-10-13 21:54:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 2055. [2019-10-13 21:54:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-13 21:54:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3465 transitions. [2019-10-13 21:54:33,035 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3465 transitions. Word has length 111 [2019-10-13 21:54:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:33,036 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3465 transitions. [2019-10-13 21:54:33,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3465 transitions. [2019-10-13 21:54:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:54:33,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:33,043 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:33,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:33,253 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1269164659, now seen corresponding path program 1 times [2019-10-13 21:54:33,253 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:33,253 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97432472] [2019-10-13 21:54:33,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:33,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:33,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:33,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97432472] [2019-10-13 21:54:33,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576226029] [2019-10-13 21:54:33,393 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 21:54:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:33,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:33,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:54:33,554 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:33,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:33,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:33,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120867940] [2019-10-13 21:54:33,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:33,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:33,619 INFO L87 Difference]: Start difference. First operand 2055 states and 3465 transitions. Second operand 5 states. [2019-10-13 21:54:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:36,113 INFO L93 Difference]: Finished difference Result 5971 states and 10346 transitions. [2019-10-13 21:54:36,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:54:36,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-13 21:54:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:36,136 INFO L225 Difference]: With dead ends: 5971 [2019-10-13 21:54:36,137 INFO L226 Difference]: Without dead ends: 3921 [2019-10-13 21:54:36,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 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 21:54:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-13 21:54:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-13 21:54:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-13 21:54:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5869 transitions. [2019-10-13 21:54:36,247 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5869 transitions. Word has length 115 [2019-10-13 21:54:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:36,248 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5869 transitions. [2019-10-13 21:54:36,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5869 transitions. [2019-10-13 21:54:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 21:54:36,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:36,253 INFO L380 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, 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] [2019-10-13 21:54:36,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:36,459 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1526440021, now seen corresponding path program 1 times [2019-10-13 21:54:36,460 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:36,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413990082] [2019-10-13 21:54:36,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:36,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:36,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:36,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413990082] [2019-10-13 21:54:36,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423230445] [2019-10-13 21:54:36,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:36,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:54:37,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:37,107 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:37,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175255243] [2019-10-13 21:54:37,272 INFO L162 IcfgInterpreter]: Started Sifa with 163 locations of interest [2019-10-13 21:54:37,273 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:54:37,279 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:54:37,287 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:54:37,288 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:54:37,493 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-13 21:54:37,748 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-10-13 21:54:38,105 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2019-10-13 21:54:38,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:38,601 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 21:54:38,609 INFO L168 Benchmark]: Toolchain (without parser) took 35537.53 ms. Allocated memory was 145.8 MB in the beginning and 612.9 MB in the end (delta: 467.1 MB). Free memory was 97.8 MB in the beginning and 417.9 MB in the end (delta: -320.1 MB). Peak memory consumption was 147.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:38,610 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-13 21:54:38,611 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1400.26 ms. Allocated memory was 145.8 MB in the beginning and 227.5 MB in the end (delta: 81.8 MB). Free memory was 97.6 MB in the beginning and 172.6 MB in the end (delta: -75.0 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:38,612 INFO L168 Benchmark]: Boogie Preprocessor took 189.58 ms. Allocated memory is still 227.5 MB. Free memory was 172.6 MB in the beginning and 162.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:38,615 INFO L168 Benchmark]: RCFGBuilder took 15323.23 ms. Allocated memory was 227.5 MB in the beginning and 354.4 MB in the end (delta: 126.9 MB). Free memory was 162.5 MB in the beginning and 185.9 MB in the end (delta: -23.5 MB). Peak memory consumption was 209.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:38,616 INFO L168 Benchmark]: TraceAbstraction took 18619.83 ms. Allocated memory was 354.4 MB in the beginning and 612.9 MB in the end (delta: 258.5 MB). Free memory was 185.9 MB in the beginning and 417.9 MB in the end (delta: -232.0 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:38,623 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1400.26 ms. Allocated memory was 145.8 MB in the beginning and 227.5 MB in the end (delta: 81.8 MB). Free memory was 97.6 MB in the beginning and 172.6 MB in the end (delta: -75.0 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 189.58 ms. Allocated memory is still 227.5 MB. Free memory was 172.6 MB in the beginning and 162.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 15323.23 ms. Allocated memory was 227.5 MB in the beginning and 354.4 MB in the end (delta: 126.9 MB). Free memory was 162.5 MB in the beginning and 185.9 MB in the end (delta: -23.5 MB). Peak memory consumption was 209.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18619.83 ms. Allocated memory was 354.4 MB in the beginning and 612.9 MB in the end (delta: 258.5 MB). Free memory was 185.9 MB in the beginning and 417.9 MB in the end (delta: -232.0 MB). Peak memory consumption was 26.5 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...