java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem18_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:44:06,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:44:06,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:44:06,193 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:44:06,193 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:44:06,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:44:06,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:44:06,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:44:06,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:44:06,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:44:06,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:44:06,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 03:44:06,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:44:06,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:44:06,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:44:06,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:44:06,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:44:06,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:44:06,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:44:06,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:44:06,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:44:06,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:44:06,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:44:06,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:44:06,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:44:06,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:44:06,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:44:06,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:44:06,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 03:44:06,292 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:44:06,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:44:06,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:44:06,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:44:06,294 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:44:06,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:44:06,295 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:44:06,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:44:06,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:44:06,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:44:06,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:44:06,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:44:06,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:44:06,297 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:44:06,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:44:06,298 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:44:06,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:44:06,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:44:06,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:44:06,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:44:06,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:44:06,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:44:06,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:44:06,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:44:06,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:44:06,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:44:06,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:44:06,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:44:06,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 03:44:06,583 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:44:06,595 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:44:06,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:44:06,601 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:44:06,601 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:44:06,602 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label28.c [2019-10-07 03:44:06,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f38e3af/2265ab3445f74972801318a2be56d073/FLAG52047f2ba [2019-10-07 03:44:07,442 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:44:07,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label28.c [2019-10-07 03:44:07,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f38e3af/2265ab3445f74972801318a2be56d073/FLAG52047f2ba [2019-10-07 03:44:07,523 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31f38e3af/2265ab3445f74972801318a2be56d073 [2019-10-07 03:44:07,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:44:07,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:44:07,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:44:07,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:44:07,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:44:07,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:44:07" (1/1) ... [2019-10-07 03:44:07,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8239ea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:07, skipping insertion in model container [2019-10-07 03:44:07,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:44:07" (1/1) ... [2019-10-07 03:44:07,557 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:44:07,694 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:44:08,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:44:08,938 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:44:09,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:44:09,447 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:44:09,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09 WrapperNode [2019-10-07 03:44:09,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:44:09,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:44:09,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:44:09,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:44:09,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... [2019-10-07 03:44:09,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:44:09,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:44:09,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:44:09,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:44:09,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:44:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:44:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:44:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:44:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:44:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-07 03:44:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:44:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:44:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:44:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-07 03:44:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:44:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:44:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:44:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:44:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:44:09,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:45:37,100 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:45:37,101 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:45:37,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:45:37 BoogieIcfgContainer [2019-10-07 03:45:37,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:45:37,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:45:37,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:45:37,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:45:37,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:44:07" (1/3) ... [2019-10-07 03:45:37,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9620ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:45:37, skipping insertion in model container [2019-10-07 03:45:37,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:44:09" (2/3) ... [2019-10-07 03:45:37,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9620ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:45:37, skipping insertion in model container [2019-10-07 03:45:37,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:45:37" (3/3) ... [2019-10-07 03:45:37,114 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label28.c [2019-10-07 03:45:37,124 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:45:37,133 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:45:37,145 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:45:37,179 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:45:37,179 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:45:37,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:45:37,180 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:45:37,180 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:45:37,180 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:45:37,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:45:37,181 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:45:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states. [2019-10-07 03:45:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:45:37,217 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:45:37,219 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:45:37,221 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:45:37,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:45:37,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1816948646, now seen corresponding path program 1 times [2019-10-07 03:45:37,236 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:45:37,237 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:45:37,237 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:45:37,237 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:45:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:45:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:45:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:45:37,536 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:45:37,537 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:45:37,537 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:45:37,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:45:37,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:45:37,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:45:37,560 INFO L87 Difference]: Start difference. First operand 469 states. Second operand 4 states. [2019-10-07 03:45:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:45:46,971 INFO L93 Difference]: Finished difference Result 1853 states and 3640 transitions. [2019-10-07 03:45:46,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:45:46,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-07 03:45:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:45:47,006 INFO L225 Difference]: With dead ends: 1853 [2019-10-07 03:45:47,007 INFO L226 Difference]: Without dead ends: 1377 [2019-10-07 03:45:47,015 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:45:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2019-10-07 03:45:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 917. [2019-10-07 03:45:47,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-07 03:45:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1508 transitions. [2019-10-07 03:45:47,141 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1508 transitions. Word has length 11 [2019-10-07 03:45:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:45:47,141 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1508 transitions. [2019-10-07 03:45:47,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:45:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1508 transitions. [2019-10-07 03:45:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-07 03:45:47,144 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:45:47,144 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:45:47,144 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:45:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:45:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1759031057, now seen corresponding path program 1 times [2019-10-07 03:45:47,145 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:45:47,145 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:45:47,146 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:45:47,146 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:45:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:45:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:45:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:45:47,261 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:45:47,262 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:45:47,262 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 03:45:47,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:45:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:45:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 03:45:47,265 INFO L87 Difference]: Start difference. First operand 917 states and 1508 transitions. Second operand 5 states. [2019-10-07 03:45:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:45:53,891 INFO L93 Difference]: Finished difference Result 2775 states and 4610 transitions. [2019-10-07 03:45:53,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:45:53,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-07 03:45:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:45:53,909 INFO L225 Difference]: With dead ends: 2775 [2019-10-07 03:45:53,910 INFO L226 Difference]: Without dead ends: 1863 [2019-10-07 03:45:53,913 INFO L606 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 [2019-10-07 03:45:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1863 states. [2019-10-07 03:45:53,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1863 to 1820. [2019-10-07 03:45:53,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1820 states. [2019-10-07 03:45:54,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 2819 transitions. [2019-10-07 03:45:54,003 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 2819 transitions. Word has length 21 [2019-10-07 03:45:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:45:54,003 INFO L462 AbstractCegarLoop]: Abstraction has 1820 states and 2819 transitions. [2019-10-07 03:45:54,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:45:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 2819 transitions. [2019-10-07 03:45:54,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-07 03:45:54,005 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:45:54,005 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:45:54,005 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:45:54,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:45:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash -929488345, now seen corresponding path program 1 times [2019-10-07 03:45:54,006 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:45:54,006 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:45:54,006 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:45:54,007 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:45:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:45:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:45:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:45:54,114 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:45:54,114 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:45:54,114 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:45:54,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:45:54,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:45:54,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:45:54,116 INFO L87 Difference]: Start difference. First operand 1820 states and 2819 transitions. Second operand 6 states. [2019-10-07 03:46:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:46:01,866 INFO L93 Difference]: Finished difference Result 5045 states and 8042 transitions. [2019-10-07 03:46:01,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:46:01,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-07 03:46:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:46:01,886 INFO L225 Difference]: With dead ends: 5045 [2019-10-07 03:46:01,887 INFO L226 Difference]: Without dead ends: 3230 [2019-10-07 03:46:01,893 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:46:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2019-10-07 03:46:01,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3205. [2019-10-07 03:46:01,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3205 states. [2019-10-07 03:46:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 4565 transitions. [2019-10-07 03:46:01,997 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 4565 transitions. Word has length 25 [2019-10-07 03:46:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:46:01,997 INFO L462 AbstractCegarLoop]: Abstraction has 3205 states and 4565 transitions. [2019-10-07 03:46:01,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:46:01,998 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 4565 transitions. [2019-10-07 03:46:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-07 03:46:02,000 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:46:02,000 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:46:02,000 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:46:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:46:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1012877848, now seen corresponding path program 1 times [2019-10-07 03:46:02,001 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:46:02,001 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:46:02,001 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:46:02,002 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:46:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:46:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:46:02,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:46:02,149 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:46:02,150 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:46:02,150 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:46:02,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:46:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:46:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:46:02,151 INFO L87 Difference]: Start difference. First operand 3205 states and 4565 transitions. Second operand 4 states. [2019-10-07 03:46:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:46:06,641 INFO L93 Difference]: Finished difference Result 11391 states and 16171 transitions. [2019-10-07 03:46:06,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:46:06,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2019-10-07 03:46:06,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:46:06,696 INFO L225 Difference]: With dead ends: 11391 [2019-10-07 03:46:06,696 INFO L226 Difference]: Without dead ends: 8191 [2019-10-07 03:46:06,708 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:46:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8191 states. [2019-10-07 03:46:06,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8191 to 7508. [2019-10-07 03:46:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7508 states. [2019-10-07 03:46:06,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 10055 transitions. [2019-10-07 03:46:06,918 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 10055 transitions. Word has length 58 [2019-10-07 03:46:06,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:46:06,920 INFO L462 AbstractCegarLoop]: Abstraction has 7508 states and 10055 transitions. [2019-10-07 03:46:06,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:46:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 10055 transitions. [2019-10-07 03:46:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-07 03:46:06,930 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:46:06,931 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-07 03:46:06,931 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:46:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:46:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1159582610, now seen corresponding path program 1 times [2019-10-07 03:46:06,932 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:46:06,932 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:46:06,932 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:46:06,932 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:46:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:46:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:46:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:46:07,146 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:46:07,146 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:46:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:46:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:46:07,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:46:07,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:46:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:46:07,357 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:46:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:46:07,447 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:46:07,481 INFO L162 IcfgInterpreter]: Started Sifa with 70 locations of interest [2019-10-07 03:46:07,481 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:46:07,488 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:46:07,496 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:46:07,497 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:46:07,738 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2019-10-07 03:46:08,009 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2019-10-07 03:46:08,373 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2019-10-07 03:46:08,972 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:46:08,973 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 03:46:08,987 INFO L168 Benchmark]: Toolchain (without parser) took 121444.54 ms. Allocated memory was 146.3 MB in the beginning and 1.2 GB in the end (delta: 1.1 GB). Free memory was 93.9 MB in the beginning and 721.4 MB in the end (delta: -627.6 MB). Peak memory consumption was 471.3 MB. Max. memory is 7.1 GB. [2019-10-07 03:46:08,989 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:46:08,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1909.13 ms. Allocated memory was 146.3 MB in the beginning and 243.8 MB in the end (delta: 97.5 MB). Free memory was 93.7 MB in the beginning and 179.4 MB in the end (delta: -85.7 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:46:08,991 INFO L168 Benchmark]: Boogie Preprocessor took 249.50 ms. Allocated memory is still 243.8 MB. Free memory was 179.4 MB in the beginning and 159.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:46:08,992 INFO L168 Benchmark]: RCFGBuilder took 87403.99 ms. Allocated memory was 243.8 MB in the beginning and 878.7 MB in the end (delta: 634.9 MB). Free memory was 159.5 MB in the beginning and 559.4 MB in the end (delta: -400.0 MB). Peak memory consumption was 680.1 MB. Max. memory is 7.1 GB. [2019-10-07 03:46:08,993 INFO L168 Benchmark]: TraceAbstraction took 31874.07 ms. Allocated memory was 878.7 MB in the beginning and 1.2 GB in the end (delta: 366.5 MB). Free memory was 559.2 MB in the beginning and 721.4 MB in the end (delta: -162.2 MB). Peak memory consumption was 204.3 MB. Max. memory is 7.1 GB. [2019-10-07 03:46:08,998 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.3 MB. Free memory was 122.7 MB in the beginning and 122.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1909.13 ms. Allocated memory was 146.3 MB in the beginning and 243.8 MB in the end (delta: 97.5 MB). Free memory was 93.7 MB in the beginning and 179.4 MB in the end (delta: -85.7 MB). Peak memory consumption was 78.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 249.50 ms. Allocated memory is still 243.8 MB. Free memory was 179.4 MB in the beginning and 159.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 87403.99 ms. Allocated memory was 243.8 MB in the beginning and 878.7 MB in the end (delta: 634.9 MB). Free memory was 159.5 MB in the beginning and 559.4 MB in the end (delta: -400.0 MB). Peak memory consumption was 680.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 31874.07 ms. Allocated memory was 878.7 MB in the beginning and 1.2 GB in the end (delta: 366.5 MB). Free memory was 559.2 MB in the beginning and 721.4 MB in the end (delta: -162.2 MB). Peak memory consumption was 204.3 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:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...