java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:40:20,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:40:20,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:40:21,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:40:21,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:40:21,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:40:21,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:40:21,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:40:21,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:40:21,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:40:21,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:40:21,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:40:21,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:40:21,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:40:21,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:40:21,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:40:21,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:40:21,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:40:21,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:40:21,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:40:21,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:40:21,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:40:21,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:40:21,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:40:21,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:40:21,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:40:21,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:40:21,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:40:21,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:40:21,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:40:21,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:40:21,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:40:21,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:40:21,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:40:21,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:40:21,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:40:21,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:40:21,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:40:21,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:40:21,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:40:21,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:40:21,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:40:21,097 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:40:21,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:40:21,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:40:21,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:40:21,101 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:40:21,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:40:21,101 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:40:21,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:40:21,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:40:21,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:40:21,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:40:21,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:40:21,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:40:21,104 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:40:21,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:40:21,104 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:40:21,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:40:21,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:40:21,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:40:21,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:40:21,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:40:21,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:40:21,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:40:21,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:40:21,106 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:40:21,106 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:40:21,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:40:21,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:40:21,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:40:21,417 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:40:21,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:40:21,449 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:40:21,450 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:40:21,451 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:40:21,451 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-13 21:40:21,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7be1456/22551edf53b64426b6cb251827e9ff6e/FLAGbfa13eadf [2019-10-13 21:40:22,133 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:40:22,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-13 21:40:22,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7be1456/22551edf53b64426b6cb251827e9ff6e/FLAGbfa13eadf [2019-10-13 21:40:22,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d7be1456/22551edf53b64426b6cb251827e9ff6e [2019-10-13 21:40:22,431 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:40:22,432 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:40:22,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:40:22,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:40:22,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:40:22,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:40:22" (1/1) ... [2019-10-13 21:40:22,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa87bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:22, skipping insertion in model container [2019-10-13 21:40:22,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:40:22" (1/1) ... [2019-10-13 21:40:22,449 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:40:22,508 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:40:23,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:40:23,010 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:40:23,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:40:23,162 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:40:23,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23 WrapperNode [2019-10-13 21:40:23,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:40:23,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:40:23,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:40:23,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:40:23,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (1/1) ... [2019-10-13 21:40:23,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:40:23,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:40:23,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:40:23,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:40:23,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (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 21:40:23,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:40:23,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:40:23,448 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:40:23,448 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:40:23,448 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:40:23,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:40:23,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:40:23,451 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:40:23,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:40:23,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:40:23,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:40:25,843 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:40:25,844 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:40:25,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:40:25 BoogieIcfgContainer [2019-10-13 21:40:25,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:40:25,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:40:25,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:40:25,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:40:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:40:22" (1/3) ... [2019-10-13 21:40:25,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc7e1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:40:25, skipping insertion in model container [2019-10-13 21:40:25,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:23" (2/3) ... [2019-10-13 21:40:25,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc7e1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:40:25, skipping insertion in model container [2019-10-13 21:40:25,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:40:25" (3/3) ... [2019-10-13 21:40:25,854 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label25.c [2019-10-13 21:40:25,865 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:40:25,874 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:40:25,887 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:40:25,919 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:40:25,919 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:40:25,920 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:40:25,920 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:40:25,920 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:40:25,920 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:40:25,920 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:40:25,920 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:40:25,958 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-13 21:40:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 21:40:25,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:25,972 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:40:25,975 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:25,981 INFO L82 PathProgramCache]: Analyzing trace with hash 826823268, now seen corresponding path program 1 times [2019-10-13 21:40:25,991 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:25,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585005414] [2019-10-13 21:40:25,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:25,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:25,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:26,443 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 21:40:26,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585005414] [2019-10-13 21:40:26,445 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:26,446 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:40:26,446 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141886045] [2019-10-13 21:40:26,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:40:26,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:26,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:40:26,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:40:26,470 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-13 21:40:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:27,090 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-13 21:40:27,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:40:27,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-13 21:40:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:27,122 INFO L225 Difference]: With dead ends: 246 [2019-10-13 21:40:27,122 INFO L226 Difference]: Without dead ends: 157 [2019-10-13 21:40:27,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:40:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-13 21:40:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-13 21:40:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 21:40:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-10-13 21:40:27,246 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-10-13 21:40:27,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:27,247 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-10-13 21:40:27,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:40:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-10-13 21:40:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:40:27,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:27,254 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:40:27,254 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1022492965, now seen corresponding path program 1 times [2019-10-13 21:40:27,255 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:27,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747772592] [2019-10-13 21:40:27,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:27,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:27,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:27,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747772592] [2019-10-13 21:40:27,345 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:27,346 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:40:27,346 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612879353] [2019-10-13 21:40:27,348 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:40:27,348 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:40:27,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:40:27,349 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-10-13 21:40:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:27,926 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-10-13 21:40:27,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:40:27,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-10-13 21:40:27,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:27,931 INFO L225 Difference]: With dead ends: 479 [2019-10-13 21:40:27,931 INFO L226 Difference]: Without dead ends: 327 [2019-10-13 21:40:27,934 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:40:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-13 21:40:27,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-10-13 21:40:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-13 21:40:27,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 547 transitions. [2019-10-13 21:40:27,966 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 547 transitions. Word has length 86 [2019-10-13 21:40:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:27,967 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 547 transitions. [2019-10-13 21:40:27,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:40:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 547 transitions. [2019-10-13 21:40:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 21:40:27,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:27,975 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:40:27,975 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash -311199160, now seen corresponding path program 1 times [2019-10-13 21:40:27,976 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:27,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742548814] [2019-10-13 21:40:27,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:27,977 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:27,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:28,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742548814] [2019-10-13 21:40:28,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628306224] [2019-10-13 21:40:28,134 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 21:40:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:28,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:40:28,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:40:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:40:28,396 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:40:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:40:28,454 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:40:28,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-13 21:40:28,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213895351] [2019-10-13 21:40:28,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:40:28,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:40:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:40:28,458 INFO L87 Difference]: Start difference. First operand 317 states and 547 transitions. Second operand 3 states. [2019-10-13 21:40:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:28,871 INFO L93 Difference]: Finished difference Result 860 states and 1512 transitions. [2019-10-13 21:40:28,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:40:28,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-13 21:40:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:28,882 INFO L225 Difference]: With dead ends: 860 [2019-10-13 21:40:28,882 INFO L226 Difference]: Without dead ends: 548 [2019-10-13 21:40:28,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:40:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-13 21:40:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2019-10-13 21:40:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2019-10-13 21:40:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 908 transitions. [2019-10-13 21:40:28,942 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 908 transitions. Word has length 97 [2019-10-13 21:40:28,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:28,943 INFO L462 AbstractCegarLoop]: Abstraction has 548 states and 908 transitions. [2019-10-13 21:40:28,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:40:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 908 transitions. [2019-10-13 21:40:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 21:40:28,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:28,951 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:40:29,156 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:40:29,157 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1630248519, now seen corresponding path program 1 times [2019-10-13 21:40:29,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:29,158 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393166348] [2019-10-13 21:40:29,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:29,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:29,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:29,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:29,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393166348] [2019-10-13 21:40:29,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413940689] [2019-10-13 21:40:29,359 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 21:40:29,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:29,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:40:29,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:40:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:29,495 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:40:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:29,558 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:40:29,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-13 21:40:29,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359602278] [2019-10-13 21:40:29,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:40:29,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:40:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:40:29,560 INFO L87 Difference]: Start difference. First operand 548 states and 908 transitions. Second operand 3 states. [2019-10-13 21:40:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:29,987 INFO L93 Difference]: Finished difference Result 1626 states and 2793 transitions. [2019-10-13 21:40:29,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:40:29,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-13 21:40:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:29,996 INFO L225 Difference]: With dead ends: 1626 [2019-10-13 21:40:29,996 INFO L226 Difference]: Without dead ends: 1083 [2019-10-13 21:40:29,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:40:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-10-13 21:40:30,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 933. [2019-10-13 21:40:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2019-10-13 21:40:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1505 transitions. [2019-10-13 21:40:30,042 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1505 transitions. Word has length 96 [2019-10-13 21:40:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:30,042 INFO L462 AbstractCegarLoop]: Abstraction has 933 states and 1505 transitions. [2019-10-13 21:40:30,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:40:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1505 transitions. [2019-10-13 21:40:30,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 21:40:30,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:30,047 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 21:40:30,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:40:30,261 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:30,262 INFO L82 PathProgramCache]: Analyzing trace with hash 494119127, now seen corresponding path program 1 times [2019-10-13 21:40:30,262 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:30,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806866620] [2019-10-13 21:40:30,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:30,263 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:30,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:30,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806866620] [2019-10-13 21:40:30,335 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:30,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:40:30,336 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703926983] [2019-10-13 21:40:30,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:40:30,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:30,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:40:30,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:40:30,337 INFO L87 Difference]: Start difference. First operand 933 states and 1505 transitions. Second operand 6 states. [2019-10-13 21:40:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:30,978 INFO L93 Difference]: Finished difference Result 2353 states and 3945 transitions. [2019-10-13 21:40:30,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:40:30,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2019-10-13 21:40:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:30,989 INFO L225 Difference]: With dead ends: 2353 [2019-10-13 21:40:30,989 INFO L226 Difference]: Without dead ends: 1425 [2019-10-13 21:40:30,991 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 21:40:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2019-10-13 21:40:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1417. [2019-10-13 21:40:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1417 states. [2019-10-13 21:40:31,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2274 transitions. [2019-10-13 21:40:31,050 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2274 transitions. Word has length 105 [2019-10-13 21:40:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:31,051 INFO L462 AbstractCegarLoop]: Abstraction has 1417 states and 2274 transitions. [2019-10-13 21:40:31,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:40:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2274 transitions. [2019-10-13 21:40:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:40:31,057 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:31,057 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:40:31,058 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:31,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:31,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1462332342, now seen corresponding path program 1 times [2019-10-13 21:40:31,063 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:31,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492930617] [2019-10-13 21:40:31,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:31,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:31,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:31,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492930617] [2019-10-13 21:40:31,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104226849] [2019-10-13 21:40:31,176 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 21:40:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:31,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:40:31,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:40:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:31,332 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:40:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:31,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715934876] [2019-10-13 21:40:31,440 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-13 21:40:31,441 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:40:31,447 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:40:31,455 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:40:31,456 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:40:31,783 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 100 for LOIs [2019-10-13 21:40:32,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:40:32,247 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 21:40:32,255 INFO L168 Benchmark]: Toolchain (without parser) took 9821.78 ms. Allocated memory was 138.4 MB in the beginning and 338.2 MB in the end (delta: 199.8 MB). Free memory was 101.6 MB in the beginning and 232.6 MB in the end (delta: -131.0 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:32,256 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 138.4 MB. Free memory was 121.7 MB in the beginning and 121.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 21:40:32,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 730.82 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 101.4 MB in the beginning and 168.9 MB in the end (delta: -67.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:32,258 INFO L168 Benchmark]: Boogie Preprocessor took 172.37 ms. Allocated memory is still 204.5 MB. Free memory was 168.9 MB in the beginning and 163.2 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:32,259 INFO L168 Benchmark]: RCFGBuilder took 2508.28 ms. Allocated memory was 204.5 MB in the beginning and 254.8 MB in the end (delta: 50.3 MB). Free memory was 163.2 MB in the beginning and 217.4 MB in the end (delta: -54.2 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:32,260 INFO L168 Benchmark]: TraceAbstraction took 6405.97 ms. Allocated memory was 254.8 MB in the beginning and 338.2 MB in the end (delta: 83.4 MB). Free memory was 215.5 MB in the beginning and 232.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:32,264 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 138.4 MB. Free memory was 121.7 MB in the beginning and 121.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 730.82 ms. Allocated memory was 138.4 MB in the beginning and 204.5 MB in the end (delta: 66.1 MB). Free memory was 101.4 MB in the beginning and 168.9 MB in the end (delta: -67.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 172.37 ms. Allocated memory is still 204.5 MB. Free memory was 168.9 MB in the beginning and 163.2 MB in the end (delta: 5.6 MB). Peak memory consumption was 5.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2508.28 ms. Allocated memory was 204.5 MB in the beginning and 254.8 MB in the end (delta: 50.3 MB). Free memory was 163.2 MB in the beginning and 217.4 MB in the end (delta: -54.2 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6405.97 ms. Allocated memory was 254.8 MB in the beginning and 338.2 MB in the end (delta: 83.4 MB). Free memory was 215.5 MB in the beginning and 232.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...