java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:54:18,208 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:54:18,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:54:18,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:54:18,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:54:18,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:54:18,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:54:18,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:54:18,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:54:18,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:54:18,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:54:18,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:54:18,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:54:18,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:54:18,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:54:18,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:54:18,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:54:18,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:54:18,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:54:18,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:54:18,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:54:18,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:54:18,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:54:18,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:54:18,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:54:18,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:54:18,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:54:18,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:54:18,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:54:18,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:54:18,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:54:18,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:54:18,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:54:18,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:54:18,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:54:18,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:54:18,293 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:54:18,323 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:54:18,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:54:18,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:54:18,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:54:18,324 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:54:18,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:54:18,325 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:54:18,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:54:18,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:54:18,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:54:18,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:54:18,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:54:18,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:54:18,333 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:54:18,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:54:18,334 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:54:18,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:54:18,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:54:18,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:54:18,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:54:18,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:54:18,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:54:18,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:54:18,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:54:18,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:54:18,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:54:18,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:54:18,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:54:18,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:54:18,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:54:18,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:54:18,627 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:54:18,628 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:54:18,629 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:54:18,629 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-13 21:54:18,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09e538807/71287d7eed264632ad40621fcaed8572/FLAG72e91d315 [2019-10-13 21:54:19,376 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:54:19,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-13 21:54:19,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09e538807/71287d7eed264632ad40621fcaed8572/FLAG72e91d315 [2019-10-13 21:54:19,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09e538807/71287d7eed264632ad40621fcaed8572 [2019-10-13 21:54:19,529 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:54:19,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:54:19,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:54:19,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:54:19,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:54:19,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:19" (1/1) ... [2019-10-13 21:54:19,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6584bdd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:19, skipping insertion in model container [2019-10-13 21:54:19,542 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:54:19" (1/1) ... [2019-10-13 21:54:19,552 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:54:19,636 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:54:20,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:54:20,520 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:54:21,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:54:21,190 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:54:21,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21 WrapperNode [2019-10-13 21:54:21,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:54:21,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:54:21,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:54:21,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:54:21,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... [2019-10-13 21:54:21,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:54:21,398 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:54:21,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:54:21,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:54:21,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:54:21,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:54:21,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:54:21,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:54:21,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:54:21,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:54:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:54:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:54:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:54:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:54:21,463 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:54:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:54:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:54:21,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:54:39,083 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:54:39,084 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:54:39,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:39 BoogieIcfgContainer [2019-10-13 21:54:39,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:54:39,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:54:39,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:54:39,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:54:39,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:54:19" (1/3) ... [2019-10-13 21:54:39,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e0384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:39, skipping insertion in model container [2019-10-13 21:54:39,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:54:21" (2/3) ... [2019-10-13 21:54:39,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e0384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:39, skipping insertion in model container [2019-10-13 21:54:39,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:39" (3/3) ... [2019-10-13 21:54:39,096 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-10-13 21:54:39,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:54:39,119 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:54:39,131 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:54:39,172 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:54:39,173 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:54:39,173 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:54:39,173 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:54:39,173 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:54:39,173 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:54:39,173 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:54:39,173 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:54:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:54:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:54:39,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:39,209 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:39,211 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:39,217 INFO L82 PathProgramCache]: Analyzing trace with hash 863563071, now seen corresponding path program 1 times [2019-10-13 21:54:39,224 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:39,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398466427] [2019-10-13 21:54:39,224 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:39,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:39,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:39,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398466427] [2019-10-13 21:54:39,502 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:39,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:54:39,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27297999] [2019-10-13 21:54:39,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:54:39,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:39,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:54:39,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:39,528 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-13 21:54:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:42,150 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-13 21:54:42,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:54:42,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:54:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:42,171 INFO L225 Difference]: With dead ends: 718 [2019-10-13 21:54:42,171 INFO L226 Difference]: Without dead ends: 471 [2019-10-13 21:54:42,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-13 21:54:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-13 21:54:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-13 21:54:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-13 21:54:42,269 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-13 21:54:42,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:42,269 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-13 21:54:42,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:54:42,270 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-13 21:54:42,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 21:54:42,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:42,273 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:42,273 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash -867992578, now seen corresponding path program 1 times [2019-10-13 21:54:42,274 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:42,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353801277] [2019-10-13 21:54:42,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:42,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:42,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:42,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353801277] [2019-10-13 21:54:42,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:42,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:54:42,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635737255] [2019-10-13 21:54:42,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:54:42,464 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:42,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:54:42,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:54:42,465 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-13 21:54:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:44,707 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-13 21:54:44,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:44,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-13 21:54:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:44,719 INFO L225 Difference]: With dead ends: 1390 [2019-10-13 21:54:44,719 INFO L226 Difference]: Without dead ends: 933 [2019-10-13 21:54:44,721 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:54:44,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-13 21:54:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-13 21:54:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-13 21:54:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-13 21:54:44,779 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-13 21:54:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:44,780 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-13 21:54:44,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:54:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-13 21:54:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 21:54:44,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:44,784 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:44,785 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:44,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:44,785 INFO L82 PathProgramCache]: Analyzing trace with hash -509383069, now seen corresponding path program 1 times [2019-10-13 21:54:44,786 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:44,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503461847] [2019-10-13 21:54:44,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:44,786 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:44,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:45,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503461847] [2019-10-13 21:54:45,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236509206] [2019-10-13 21:54:45,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:45,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:45,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:45,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:45,322 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:45,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:45,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294575833] [2019-10-13 21:54:45,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:45,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:45,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:45,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:45,325 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-13 21:54:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:47,447 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-13 21:54:47,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:47,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-13 21:54:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:47,458 INFO L225 Difference]: With dead ends: 2074 [2019-10-13 21:54:47,458 INFO L226 Difference]: Without dead ends: 1162 [2019-10-13 21:54:47,462 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:54:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-13 21:54:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-13 21:54:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-13 21:54:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-13 21:54:47,518 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-13 21:54:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:47,519 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-13 21:54:47,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-13 21:54:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 21:54:47,531 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:47,531 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:47,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:47,741 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:47,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash 919808893, now seen corresponding path program 1 times [2019-10-13 21:54:47,742 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:47,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055515828] [2019-10-13 21:54:47,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:47,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:47,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:47,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055515828] [2019-10-13 21:54:47,861 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517536446] [2019-10-13 21:54:47,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:47,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:47,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:48,008 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:54:48,008 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:48,074 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:48,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 21:54:48,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392727740] [2019-10-13 21:54:48,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:48,075 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:48,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:48,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:54:48,076 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-13 21:54:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:50,839 INFO L93 Difference]: Finished difference Result 3268 states and 5829 transitions. [2019-10-13 21:54:50,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:54:50,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-13 21:54:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:50,859 INFO L225 Difference]: With dead ends: 3268 [2019-10-13 21:54:50,859 INFO L226 Difference]: Without dead ends: 2121 [2019-10-13 21:54:50,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:54:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2019-10-13 21:54:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2055. [2019-10-13 21:54:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-13 21:54:50,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3464 transitions. [2019-10-13 21:54:50,944 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3464 transitions. Word has length 111 [2019-10-13 21:54:50,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:50,945 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3464 transitions. [2019-10-13 21:54:50,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:50,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3464 transitions. [2019-10-13 21:54:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-13 21:54:50,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:50,949 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:51,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:51,153 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:51,153 INFO L82 PathProgramCache]: Analyzing trace with hash -684891723, now seen corresponding path program 1 times [2019-10-13 21:54:51,154 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:51,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579814120] [2019-10-13 21:54:51,154 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:51,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:51,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:51,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579814120] [2019-10-13 21:54:51,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991383134] [2019-10-13 21:54:51,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:51,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:51,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-13 21:54:51,523 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 21:54:51,604 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:51,604 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:51,605 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006187119] [2019-10-13 21:54:51,606 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:51,606 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:51,607 INFO L87 Difference]: Start difference. First operand 2055 states and 3464 transitions. Second operand 5 states. [2019-10-13 21:54:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:53,877 INFO L93 Difference]: Finished difference Result 5971 states and 10343 transitions. [2019-10-13 21:54:53,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:54:53,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-13 21:54:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:53,901 INFO L225 Difference]: With dead ends: 5971 [2019-10-13 21:54:53,901 INFO L226 Difference]: Without dead ends: 3921 [2019-10-13 21:54:53,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:54:53,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-13 21:54:54,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-13 21:54:54,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-13 21:54:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5866 transitions. [2019-10-13 21:54:54,024 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5866 transitions. Word has length 115 [2019-10-13 21:54:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:54,025 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5866 transitions. [2019-10-13 21:54:54,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5866 transitions. [2019-10-13 21:54:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 21:54:54,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:54,032 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:54,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:54,245 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -396499717, now seen corresponding path program 1 times [2019-10-13 21:54:54,246 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:54,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722794701] [2019-10-13 21:54:54,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:54,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:54,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:54,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722794701] [2019-10-13 21:54:54,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823982142] [2019-10-13 21:54:54,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:54,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:54:54,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:54,981 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:54:55,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395548399] [2019-10-13 21:54:55,174 INFO L162 IcfgInterpreter]: Started Sifa with 163 locations of interest [2019-10-13 21:54:55,174 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:54:55,188 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:54:55,207 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:54:55,207 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:54:55,409 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-13 21:54:55,674 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-13 21:54:55,840 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-13 21:54:55,966 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-13 21:54:56,112 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-13 21:54:56,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:56,475 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:54:56,483 INFO L168 Benchmark]: Toolchain (without parser) took 36951.45 ms. Allocated memory was 146.8 MB in the beginning and 580.4 MB in the end (delta: 433.6 MB). Free memory was 100.9 MB in the beginning and 472.0 MB in the end (delta: -371.1 MB). Peak memory consumption was 62.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:56,484 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-10-13 21:54:56,491 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1657.50 ms. Allocated memory was 146.8 MB in the beginning and 233.8 MB in the end (delta: 87.0 MB). Free memory was 100.7 MB in the beginning and 181.2 MB in the end (delta: -80.5 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:56,492 INFO L168 Benchmark]: Boogie Preprocessor took 206.16 ms. Allocated memory is still 233.8 MB. Free memory was 181.2 MB in the beginning and 169.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:56,495 INFO L168 Benchmark]: RCFGBuilder took 17688.05 ms. Allocated memory was 233.8 MB in the beginning and 330.8 MB in the end (delta: 97.0 MB). Free memory was 169.9 MB in the beginning and 126.6 MB in the end (delta: 43.3 MB). Peak memory consumption was 183.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:56,496 INFO L168 Benchmark]: TraceAbstraction took 17393.72 ms. Allocated memory was 330.8 MB in the beginning and 580.4 MB in the end (delta: 249.6 MB). Free memory was 126.6 MB in the beginning and 472.0 MB in the end (delta: -345.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-13 21:54:56,501 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 146.8 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1657.50 ms. Allocated memory was 146.8 MB in the beginning and 233.8 MB in the end (delta: 87.0 MB). Free memory was 100.7 MB in the beginning and 181.2 MB in the end (delta: -80.5 MB). Peak memory consumption was 49.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 206.16 ms. Allocated memory is still 233.8 MB. Free memory was 181.2 MB in the beginning and 169.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 17688.05 ms. Allocated memory was 233.8 MB in the beginning and 330.8 MB in the end (delta: 97.0 MB). Free memory was 169.9 MB in the beginning and 126.6 MB in the end (delta: 43.3 MB). Peak memory consumption was 183.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17393.72 ms. Allocated memory was 330.8 MB in the beginning and 580.4 MB in the end (delta: 249.6 MB). Free memory was 126.6 MB in the beginning and 472.0 MB in the end (delta: -345.4 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:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...