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/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:29:43,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:29:43,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:29:43,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:29:43,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:29:43,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:29:43,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:29:43,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:29:43,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:29:43,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:29:43,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:29:43,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 03:29:43,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:29:43,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:29:43,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:29:43,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:29:43,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:29:43,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:29:43,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:29:43,171 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:29:43,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:29:43,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:29:43,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:29:43,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:29:43,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:29:43,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:29:43,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:29:43,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:29:43,198 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 03:29:43,231 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:29:43,231 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:29:43,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:29:43,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:29:43,236 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:29:43,236 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:29:43,237 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:29:43,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:29:43,237 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:29:43,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:29:43,237 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:29:43,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:29:43,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:29:43,238 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:29:43,238 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:29:43,238 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:29:43,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:29:43,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:29:43,239 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:29:43,239 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:29:43,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:29:43,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:29:43,240 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:29:43,240 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:29:43,240 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:29:43,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:29:43,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:29:43,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:29:43,241 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 03:29:43,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:29:43,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:29:43,581 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:29:43,583 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:29:43,583 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:29:43,584 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-07 03:29:43,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/505254ba4/97eccb4eb8c2432d82a98301432afab5/FLAGe3c8ca852 [2019-10-07 03:29:44,313 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:29:44,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-07 03:29:44,330 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/505254ba4/97eccb4eb8c2432d82a98301432afab5/FLAGe3c8ca852 [2019-10-07 03:29:44,470 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/505254ba4/97eccb4eb8c2432d82a98301432afab5 [2019-10-07 03:29:44,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:29:44,481 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:29:44,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:29:44,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:29:44,490 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:29:44,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:29:44" (1/1) ... [2019-10-07 03:29:44,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65f25ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:44, skipping insertion in model container [2019-10-07 03:29:44,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:29:44" (1/1) ... [2019-10-07 03:29:44,503 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:29:44,592 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:29:45,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:29:45,432 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:29:45,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:29:45,900 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:29:45,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45 WrapperNode [2019-10-07 03:29:45,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:29:45,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:29:45,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:29:45,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:29:45,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:45,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:45,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:45,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:46,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:46,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:46,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (1/1) ... [2019-10-07 03:29:46,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:29:46,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:29:46,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:29:46,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:29:46,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (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 03:29:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:29:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:29:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:29:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:29:46,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:29:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:29:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:29:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:29:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:29:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:29:46,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:29:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:29:46,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:30:00,383 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:30:00,383 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:30:00,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:30:00 BoogieIcfgContainer [2019-10-07 03:30:00,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:30:00,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:30:00,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:30:00,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:30:00,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:29:44" (1/3) ... [2019-10-07 03:30:00,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5790fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:30:00, skipping insertion in model container [2019-10-07 03:30:00,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:29:45" (2/3) ... [2019-10-07 03:30:00,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5790fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:30:00, skipping insertion in model container [2019-10-07 03:30:00,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:30:00" (3/3) ... [2019-10-07 03:30:00,395 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-10-07 03:30:00,405 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:30:00,415 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:30:00,427 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:30:00,458 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:30:00,459 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:30:00,459 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:30:00,459 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:30:00,460 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:30:00,460 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:30:00,460 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:30:00,460 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:30:00,494 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-07 03:30:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:30:00,503 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:30:00,504 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:30:00,506 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:30:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:30:00,581 INFO L82 PathProgramCache]: Analyzing trace with hash 648043117, now seen corresponding path program 1 times [2019-10-07 03:30:00,587 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:30:00,588 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:30:00,588 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:30:00,588 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:30:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:30:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:30:00,806 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 03:30:00,806 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:30:00,807 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:30:00,807 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:30:00,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:30:00,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:30:00,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:30:00,828 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-07 03:30:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:30:06,135 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-07 03:30:06,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:30:06,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-07 03:30:06,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:30:06,159 INFO L225 Difference]: With dead ends: 953 [2019-10-07 03:30:06,160 INFO L226 Difference]: Without dead ends: 702 [2019-10-07 03:30:06,168 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 03:30:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-07 03:30:06,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 691. [2019-10-07 03:30:06,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-07 03:30:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1133 transitions. [2019-10-07 03:30:06,264 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1133 transitions. Word has length 11 [2019-10-07 03:30:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:30:06,264 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1133 transitions. [2019-10-07 03:30:06,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:30:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1133 transitions. [2019-10-07 03:30:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-07 03:30:06,266 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:30:06,267 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 03:30:06,267 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:30:06,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:30:06,267 INFO L82 PathProgramCache]: Analyzing trace with hash 836538840, now seen corresponding path program 1 times [2019-10-07 03:30:06,268 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:30:06,268 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:30:06,268 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:30:06,268 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:30:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:30:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:30:06,416 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 03:30:06,417 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:30:06,417 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:30:06,417 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 03:30:06,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 03:30:06,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 03:30:06,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 03:30:06,420 INFO L87 Difference]: Start difference. First operand 691 states and 1133 transitions. Second operand 4 states. [2019-10-07 03:30:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:30:09,814 INFO L93 Difference]: Finished difference Result 2745 states and 4570 transitions. [2019-10-07 03:30:09,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 03:30:09,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-07 03:30:09,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:30:09,829 INFO L225 Difference]: With dead ends: 2745 [2019-10-07 03:30:09,830 INFO L226 Difference]: Without dead ends: 2059 [2019-10-07 03:30:09,832 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 03:30:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2019-10-07 03:30:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2057. [2019-10-07 03:30:09,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2019-10-07 03:30:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3023 transitions. [2019-10-07 03:30:09,917 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3023 transitions. Word has length 21 [2019-10-07 03:30:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:30:09,917 INFO L462 AbstractCegarLoop]: Abstraction has 2057 states and 3023 transitions. [2019-10-07 03:30:09,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 03:30:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3023 transitions. [2019-10-07 03:30:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-07 03:30:09,922 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:30:09,922 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-07 03:30:09,922 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:30:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:30:09,975 INFO L82 PathProgramCache]: Analyzing trace with hash 585847024, now seen corresponding path program 1 times [2019-10-07 03:30:09,975 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:30:09,975 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:30:09,975 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:30:09,975 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:30:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:30:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:30:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 03:30:10,193 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:30:10,193 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:30:10,193 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 03:30:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:30:10,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-07 03:30:10,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:30:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 03:30:10,425 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:30:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:30:10,593 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:30:10,643 INFO L162 IcfgInterpreter]: Started Sifa with 43 locations of interest [2019-10-07 03:30:10,644 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:30:10,652 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:30:10,661 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:30:10,662 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:30:10,895 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 58 for LOIs [2019-10-07 03:30:11,051 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-07 03:30:11,088 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-07 03:30:11,130 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-07 03:30:11,683 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7958 conjuctions. This might take some time... [2019-10-07 03:30:11,750 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-07 03:30:12,055 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7958 conjuctions. This might take some time... [2019-10-07 03:30:12,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:30:12,393 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 03:30:12,399 INFO L168 Benchmark]: Toolchain (without parser) took 27916.77 ms. Allocated memory was 137.4 MB in the beginning and 546.3 MB in the end (delta: 408.9 MB). Free memory was 96.5 MB in the beginning and 428.0 MB in the end (delta: -331.5 MB). Peak memory consumption was 77.4 MB. Max. memory is 7.1 GB. [2019-10-07 03:30:12,400 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:30:12,403 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1415.28 ms. Allocated memory was 137.4 MB in the beginning and 230.7 MB in the end (delta: 93.3 MB). Free memory was 96.1 MB in the beginning and 163.0 MB in the end (delta: -66.9 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:30:12,405 INFO L168 Benchmark]: Boogie Preprocessor took 210.26 ms. Allocated memory is still 230.7 MB. Free memory was 163.0 MB in the beginning and 150.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2019-10-07 03:30:12,407 INFO L168 Benchmark]: RCFGBuilder took 14272.65 ms. Allocated memory was 230.7 MB in the beginning and 340.3 MB in the end (delta: 109.6 MB). Free memory was 150.6 MB in the beginning and 85.0 MB in the end (delta: 65.6 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. [2019-10-07 03:30:12,408 INFO L168 Benchmark]: TraceAbstraction took 12009.40 ms. Allocated memory was 340.3 MB in the beginning and 546.3 MB in the end (delta: 206.0 MB). Free memory was 85.0 MB in the beginning and 428.0 MB in the end (delta: -343.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 03:30:12,418 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 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1415.28 ms. Allocated memory was 137.4 MB in the beginning and 230.7 MB in the end (delta: 93.3 MB). Free memory was 96.1 MB in the beginning and 163.0 MB in the end (delta: -66.9 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 210.26 ms. Allocated memory is still 230.7 MB. Free memory was 163.0 MB in the beginning and 150.6 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 14272.65 ms. Allocated memory was 230.7 MB in the beginning and 340.3 MB in the end (delta: 109.6 MB). Free memory was 150.6 MB in the beginning and 85.0 MB in the end (delta: 65.6 MB). Peak memory consumption was 175.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 12009.40 ms. Allocated memory was 340.3 MB in the beginning and 546.3 MB in the end (delta: 206.0 MB). Free memory was 85.0 MB in the beginning and 428.0 MB in the end (delta: -343.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...