java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:40:42,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:40:42,356 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:40:42,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:40:42,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:40:42,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:40:42,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:40:42,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:40:42,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:40:42,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:40:42,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:40:42,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:40:42,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:40:42,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:40:42,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:40:42,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:40:42,391 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:40:42,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:40:42,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:40:42,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:40:42,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:40:42,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:40:42,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:40:42,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:40:42,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:40:42,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:40:42,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:40:42,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:40:42,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:40:42,441 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:40:42,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:40:42,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:40:42,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:40:42,443 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:40:42,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:40:42,443 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:40:42,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:40:42,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:40:42,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:40:42,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:40:42,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:40:42,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:40:42,445 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:40:42,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:40:42,445 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:40:42,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:40:42,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:40:42,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:40:42,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:40:42,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:40:42,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:40:42,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:40:42,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:40:42,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:40:42,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:40:42,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:40:42,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:40:42,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:40:42,763 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:40:42,776 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:40:42,782 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:40:42,783 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:40:42,784 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:40:42,784 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-13 21:40:42,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969610dc/0b80f410ef9345218db2d1174884bb85/FLAG49a0e4e01 [2019-10-13 21:40:43,419 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:40:43,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label50.c [2019-10-13 21:40:43,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969610dc/0b80f410ef9345218db2d1174884bb85/FLAG49a0e4e01 [2019-10-13 21:40:43,680 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1969610dc/0b80f410ef9345218db2d1174884bb85 [2019-10-13 21:40:43,690 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:40:43,692 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:40:43,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:40:43,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:40:43,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:40:43,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:40:43" (1/1) ... [2019-10-13 21:40:43,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@462d39e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:43, skipping insertion in model container [2019-10-13 21:40:43,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:40:43" (1/1) ... [2019-10-13 21:40:43,708 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:40:43,771 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:40:44,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:40:44,323 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:40:44,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:40:44,468 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:40:44,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44 WrapperNode [2019-10-13 21:40:44,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:40:44,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:40:44,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:40:44,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:40:44,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... [2019-10-13 21:40:44,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:40:44,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:40:44,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:40:44,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:40:44,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:40:44,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:40:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:40:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:40:44,704 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:40:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:40:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:40:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:40:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:40:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:40:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:40:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:40:46,788 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:40:46,789 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:40:46,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:40:46 BoogieIcfgContainer [2019-10-13 21:40:46,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:40:46,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:40:46,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:40:46,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:40:46,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:40:43" (1/3) ... [2019-10-13 21:40:46,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4515f8af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:40:46, skipping insertion in model container [2019-10-13 21:40:46,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:40:44" (2/3) ... [2019-10-13 21:40:46,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4515f8af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:40:46, skipping insertion in model container [2019-10-13 21:40:46,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:40:46" (3/3) ... [2019-10-13 21:40:46,800 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label50.c [2019-10-13 21:40:46,810 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:40:46,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:40:46,833 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:40:46,861 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:40:46,861 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:40:46,861 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:40:46,861 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:40:46,862 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:40:46,862 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:40:46,862 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:40:46,862 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:40:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-13 21:40:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-13 21:40:46,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:46,896 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:40:46,898 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash -282027157, now seen corresponding path program 1 times [2019-10-13 21:40:46,914 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:46,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388343706] [2019-10-13 21:40:46,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:46,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:46,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:47,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388343706] [2019-10-13 21:40:47,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:47,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:40:47,356 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694119430] [2019-10-13 21:40:47,361 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:40:47,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:40:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:40:47,379 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-13 21:40:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:48,022 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-13 21:40:48,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:40:48,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-13 21:40:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:48,049 INFO L225 Difference]: With dead ends: 246 [2019-10-13 21:40:48,050 INFO L226 Difference]: Without dead ends: 157 [2019-10-13 21:40:48,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:40:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-13 21:40:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-13 21:40:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 21:40:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 279 transitions. [2019-10-13 21:40:48,158 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 279 transitions. Word has length 77 [2019-10-13 21:40:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:48,159 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 279 transitions. [2019-10-13 21:40:48,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:40:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 279 transitions. [2019-10-13 21:40:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 21:40:48,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:48,170 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:40:48,171 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:48,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1931072450, now seen corresponding path program 1 times [2019-10-13 21:40:48,174 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:48,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219543219] [2019-10-13 21:40:48,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:48,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:48,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:48,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219543219] [2019-10-13 21:40:48,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:48,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:40:48,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341870438] [2019-10-13 21:40:48,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:40:48,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:40:48,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:40:48,368 INFO L87 Difference]: Start difference. First operand 157 states and 279 transitions. Second operand 6 states. [2019-10-13 21:40:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:49,018 INFO L93 Difference]: Finished difference Result 402 states and 725 transitions. [2019-10-13 21:40:49,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:40:49,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-10-13 21:40:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:49,023 INFO L225 Difference]: With dead ends: 402 [2019-10-13 21:40:49,024 INFO L226 Difference]: Without dead ends: 250 [2019-10-13 21:40:49,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:40:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-10-13 21:40:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2019-10-13 21:40:49,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-10-13 21:40:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2019-10-13 21:40:49,067 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 87 [2019-10-13 21:40:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:49,072 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2019-10-13 21:40:49,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:40:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2019-10-13 21:40:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 21:40:49,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:49,077 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:40:49,078 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:49,078 INFO L82 PathProgramCache]: Analyzing trace with hash 311901564, now seen corresponding path program 1 times [2019-10-13 21:40:49,079 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:49,079 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731544935] [2019-10-13 21:40:49,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:49,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:49,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:49,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731544935] [2019-10-13 21:40:49,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:49,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:40:49,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008802946] [2019-10-13 21:40:49,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:40:49,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:40:49,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:40:49,256 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand 3 states. [2019-10-13 21:40:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:49,649 INFO L93 Difference]: Finished difference Result 700 states and 1240 transitions. [2019-10-13 21:40:49,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:40:49,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-13 21:40:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:49,654 INFO L225 Difference]: With dead ends: 700 [2019-10-13 21:40:49,654 INFO L226 Difference]: Without dead ends: 467 [2019-10-13 21:40:49,656 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:40:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2019-10-13 21:40:49,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 467. [2019-10-13 21:40:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-13 21:40:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 799 transitions. [2019-10-13 21:40:49,701 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 799 transitions. Word has length 88 [2019-10-13 21:40:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:49,702 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 799 transitions. [2019-10-13 21:40:49,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:40:49,702 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 799 transitions. [2019-10-13 21:40:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:40:49,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:49,713 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 21:40:49,713 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:49,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:49,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1021517488, now seen corresponding path program 1 times [2019-10-13 21:40:49,714 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:49,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777388102] [2019-10-13 21:40:49,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:49,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:49,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:49,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777388102] [2019-10-13 21:40:49,922 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:40:49,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 21:40:49,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399722810] [2019-10-13 21:40:49,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:40:49,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:40:49,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:40:49,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:40:49,924 INFO L87 Difference]: Start difference. First operand 467 states and 799 transitions. Second operand 7 states. [2019-10-13 21:40:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:40:50,879 INFO L93 Difference]: Finished difference Result 1222 states and 2241 transitions. [2019-10-13 21:40:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 21:40:50,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2019-10-13 21:40:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:40:50,888 INFO L225 Difference]: With dead ends: 1222 [2019-10-13 21:40:50,889 INFO L226 Difference]: Without dead ends: 760 [2019-10-13 21:40:50,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:40:50,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2019-10-13 21:40:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 649. [2019-10-13 21:40:50,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2019-10-13 21:40:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1028 transitions. [2019-10-13 21:40:50,939 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1028 transitions. Word has length 94 [2019-10-13 21:40:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:40:50,940 INFO L462 AbstractCegarLoop]: Abstraction has 649 states and 1028 transitions. [2019-10-13 21:40:50,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:40:50,942 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1028 transitions. [2019-10-13 21:40:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 21:40:50,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:40:50,954 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:40:50,954 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:40:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:40:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash -251346753, now seen corresponding path program 1 times [2019-10-13 21:40:50,955 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:40:50,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157259836] [2019-10-13 21:40:50,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:50,955 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:40:50,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:40:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:51,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157259836] [2019-10-13 21:40:51,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913750394] [2019-10-13 21:40:51,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:40:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:40:51,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 21:40:51,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:40:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:51,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:40:51,613 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-10-13 21:40:51,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,669 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:40:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:40:51,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996427303] [2019-10-13 21:40:51,910 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-13 21:40:51,910 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:40:51,917 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:40:51,926 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:40:51,927 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:40:52,212 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2019-10-13 21:40:52,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:40:52,652 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:40:52,659 INFO L168 Benchmark]: Toolchain (without parser) took 8967.11 ms. Allocated memory was 145.8 MB in the beginning and 332.4 MB in the end (delta: 186.6 MB). Free memory was 100.4 MB in the beginning and 149.3 MB in the end (delta: -48.9 MB). Peak memory consumption was 137.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:52,660 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:40:52,662 INFO L168 Benchmark]: CACSL2BoogieTranslator took 777.57 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 100.2 MB in the beginning and 171.5 MB in the end (delta: -71.4 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:52,663 INFO L168 Benchmark]: Boogie Preprocessor took 164.76 ms. Allocated memory is still 205.5 MB. Free memory was 171.5 MB in the beginning and 166.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:52,664 INFO L168 Benchmark]: RCFGBuilder took 2154.29 ms. Allocated memory was 205.5 MB in the beginning and 251.7 MB in the end (delta: 46.1 MB). Free memory was 166.7 MB in the beginning and 212.5 MB in the end (delta: -45.9 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:52,665 INFO L168 Benchmark]: TraceAbstraction took 5865.53 ms. Allocated memory was 251.7 MB in the beginning and 332.4 MB in the end (delta: 80.7 MB). Free memory was 212.5 MB in the beginning and 149.3 MB in the end (delta: 63.2 MB). Peak memory consumption was 144.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:40:52,670 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 145.8 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 777.57 ms. Allocated memory was 145.8 MB in the beginning and 205.5 MB in the end (delta: 59.8 MB). Free memory was 100.2 MB in the beginning and 171.5 MB in the end (delta: -71.4 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 164.76 ms. Allocated memory is still 205.5 MB. Free memory was 171.5 MB in the beginning and 166.7 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2154.29 ms. Allocated memory was 205.5 MB in the beginning and 251.7 MB in the end (delta: 46.1 MB). Free memory was 166.7 MB in the beginning and 212.5 MB in the end (delta: -45.9 MB). Peak memory consumption was 118.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5865.53 ms. Allocated memory was 251.7 MB in the beginning and 332.4 MB in the end (delta: 80.7 MB). Free memory was 212.5 MB in the beginning and 149.3 MB in the end (delta: 63.2 MB). Peak memory consumption was 144.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...