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 0.1.24-36ac518-m [2019-10-07 03:34:04,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:34:04,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:34:04,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 03:34:04,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 03:34:04,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 03:34:04,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 03:34:04,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 03:34:04,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 03:34:04,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 03:34:04,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 03:34:04,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 03:34:04,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 03:34:04,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 03:34:04,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 03:34:04,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 03:34:04,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 03:34:04,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 03:34:04,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 03:34:04,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 03:34:04,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 03:34:04,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 03:34:04,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 03:34:04,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 03:34:04,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-07 03:34:04,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:34:04,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:34:04,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:34:04,602 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 03:34:04,629 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:34:04,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:34:04,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:34:04,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:34:04,631 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:34:04,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:34:04,632 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:34:04,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:34:04,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:34:04,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:34:04,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:34:04,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:34:04,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:34:04,635 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:34:04,635 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:34:04,635 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:34:04,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:34:04,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:34:04,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:34:04,636 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:34:04,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:34:04,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:34:04,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:34:04,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:34:04,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:34:04,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:34:04,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:34:04,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:34:04,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 03:34:04,921 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:34:04,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:34:04,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:34:04,940 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:34:04,940 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:34:04,941 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-07 03:34:05,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b035c146d/f3e377ff9e794540965c8f5b120a8fcf/FLAG373752dd1 [2019-10-07 03:34:05,700 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:34:05,701 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c [2019-10-07 03:34:05,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b035c146d/f3e377ff9e794540965c8f5b120a8fcf/FLAG373752dd1 [2019-10-07 03:34:05,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b035c146d/f3e377ff9e794540965c8f5b120a8fcf [2019-10-07 03:34:05,900 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:34:05,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:34:05,903 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:34:05,903 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:34:05,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:34:05,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:34:05" (1/1) ... [2019-10-07 03:34:05,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52da3fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:05, skipping insertion in model container [2019-10-07 03:34:05,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:34:05" (1/1) ... [2019-10-07 03:34:05,917 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:34:05,994 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:34:06,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:34:06,901 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:34:07,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:34:07,117 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:34:07,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07 WrapperNode [2019-10-07 03:34:07,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:34:07,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:34:07,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:34:07,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:34:07,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,193 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... [2019-10-07 03:34:07,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:34:07,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:34:07,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:34:07,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:34:07,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:34:07,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:34:07,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:34:07,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:34:07,420 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:34:07,420 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:34:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:34:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:34:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:34:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:34:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:34:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:34:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:34:07,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:34:27,935 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:34:27,935 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:34:27,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:34:27 BoogieIcfgContainer [2019-10-07 03:34:27,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:34:27,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:34:27,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:34:27,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:34:27,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:34:05" (1/3) ... [2019-10-07 03:34:27,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d39c4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:34:27, skipping insertion in model container [2019-10-07 03:34:27,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:34:07" (2/3) ... [2019-10-07 03:34:27,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d39c4c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:34:27, skipping insertion in model container [2019-10-07 03:34:27,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:34:27" (3/3) ... [2019-10-07 03:34:27,947 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label57.c [2019-10-07 03:34:27,958 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:34:27,967 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:34:27,980 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:34:28,010 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:34:28,010 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:34:28,010 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:34:28,011 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:34:28,011 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:34:28,011 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:34:28,011 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:34:28,011 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:34:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-07 03:34:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:34:28,042 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:28,043 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:28,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:28,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:28,051 INFO L82 PathProgramCache]: Analyzing trace with hash 863563071, now seen corresponding path program 1 times [2019-10-07 03:34:28,060 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:28,060 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:28,061 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:28,061 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:34:28,290 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:28,291 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:34:28,291 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:34:28,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:34:28,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:34:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:34:28,314 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-07 03:34:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:30,374 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-07 03:34:30,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:34:30,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:34:30,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:30,407 INFO L225 Difference]: With dead ends: 718 [2019-10-07 03:34:30,408 INFO L226 Difference]: Without dead ends: 471 [2019-10-07 03:34:30,415 INFO L606 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 [2019-10-07 03:34:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-07 03:34:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 462. [2019-10-07 03:34:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-07 03:34:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 877 transitions. [2019-10-07 03:34:30,509 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 877 transitions. Word has length 11 [2019-10-07 03:34:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:30,509 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 877 transitions. [2019-10-07 03:34:30,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:34:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 877 transitions. [2019-10-07 03:34:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-07 03:34:30,515 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:30,516 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:30,516 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash -867992578, now seen corresponding path program 1 times [2019-10-07 03:34:30,518 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:30,518 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:30,518 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:30,518 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:34:30,747 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:30,747 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:34:30,747 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:34:30,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:34:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:34:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:34:30,750 INFO L87 Difference]: Start difference. First operand 462 states and 877 transitions. Second operand 6 states. [2019-10-07 03:34:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:32,950 INFO L93 Difference]: Finished difference Result 1390 states and 2669 transitions. [2019-10-07 03:34:32,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:34:32,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-07 03:34:32,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:32,961 INFO L225 Difference]: With dead ends: 1390 [2019-10-07 03:34:32,961 INFO L226 Difference]: Without dead ends: 933 [2019-10-07 03:34:32,964 INFO L606 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 [2019-10-07 03:34:32,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2019-10-07 03:34:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 917. [2019-10-07 03:34:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 917 states. [2019-10-07 03:34:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1678 transitions. [2019-10-07 03:34:33,043 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1678 transitions. Word has length 44 [2019-10-07 03:34:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:33,044 INFO L462 AbstractCegarLoop]: Abstraction has 917 states and 1678 transitions. [2019-10-07 03:34:33,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:34:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1678 transitions. [2019-10-07 03:34:33,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-07 03:34:33,052 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:33,052 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:33,053 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:33,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:33,053 INFO L82 PathProgramCache]: Analyzing trace with hash -509383069, now seen corresponding path program 1 times [2019-10-07 03:34:33,053 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:33,053 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:33,054 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:33,054 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:34:33,305 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:33,306 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:33,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:34:33,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:33,523 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 03:34:33,523 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-07 03:34:33,607 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:34:33,607 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:34:33,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:34:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:34:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:34:33,608 INFO L87 Difference]: Start difference. First operand 917 states and 1678 transitions. Second operand 5 states. [2019-10-07 03:34:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:35,680 INFO L93 Difference]: Finished difference Result 2074 states and 3785 transitions. [2019-10-07 03:34:35,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:34:35,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2019-10-07 03:34:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:35,688 INFO L225 Difference]: With dead ends: 2074 [2019-10-07 03:34:35,689 INFO L226 Difference]: Without dead ends: 1162 [2019-10-07 03:34:35,692 INFO L606 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 [2019-10-07 03:34:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2019-10-07 03:34:35,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1152. [2019-10-07 03:34:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2019-10-07 03:34:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2027 transitions. [2019-10-07 03:34:35,733 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2027 transitions. Word has length 95 [2019-10-07 03:34:35,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:35,733 INFO L462 AbstractCegarLoop]: Abstraction has 1152 states and 2027 transitions. [2019-10-07 03:34:35,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:34:35,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2027 transitions. [2019-10-07 03:34:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-07 03:34:35,737 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:35,737 INFO L385 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] [2019-10-07 03:34:35,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:35,942 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash 919808893, now seen corresponding path program 1 times [2019-10-07 03:34:35,943 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:35,943 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:35,943 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:35,944 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 03:34:36,112 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:36,112 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:36,112 INFO L95 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 [2019-10-07 03:34:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:36,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:34:36,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 03:34:36,252 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 03:34:36,332 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:34:36,332 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-07 03:34:36,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:34:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:34:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:34:36,334 INFO L87 Difference]: Start difference. First operand 1152 states and 2027 transitions. Second operand 5 states. [2019-10-07 03:34:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:39,385 INFO L93 Difference]: Finished difference Result 3268 states and 5829 transitions. [2019-10-07 03:34:39,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:34:39,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2019-10-07 03:34:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:39,399 INFO L225 Difference]: With dead ends: 3268 [2019-10-07 03:34:39,400 INFO L226 Difference]: Without dead ends: 2121 [2019-10-07 03:34:39,403 INFO L606 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 [2019-10-07 03:34:39,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2019-10-07 03:34:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2055. [2019-10-07 03:34:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2055 states. [2019-10-07 03:34:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3464 transitions. [2019-10-07 03:34:39,467 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3464 transitions. Word has length 111 [2019-10-07 03:34:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:39,468 INFO L462 AbstractCegarLoop]: Abstraction has 2055 states and 3464 transitions. [2019-10-07 03:34:39,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:34:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3464 transitions. [2019-10-07 03:34:39,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-07 03:34:39,472 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:39,472 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2019-10-07 03:34:39,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:39,679 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:39,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:39,680 INFO L82 PathProgramCache]: Analyzing trace with hash -684891723, now seen corresponding path program 1 times [2019-10-07 03:34:39,680 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:39,680 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:39,681 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:39,681 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 03:34:39,786 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:39,786 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:39,786 INFO L95 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 [2019-10-07 03:34:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:39,902 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:34:39,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-10-07 03:34:39,945 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-07 03:34:40,010 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:34:40,010 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-07 03:34:40,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:34:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:34:40,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:34:40,012 INFO L87 Difference]: Start difference. First operand 2055 states and 3464 transitions. Second operand 5 states. [2019-10-07 03:34:42,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:34:42,315 INFO L93 Difference]: Finished difference Result 5971 states and 10343 transitions. [2019-10-07 03:34:42,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 03:34:42,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-10-07 03:34:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:34:42,342 INFO L225 Difference]: With dead ends: 5971 [2019-10-07 03:34:42,342 INFO L226 Difference]: Without dead ends: 3921 [2019-10-07 03:34:42,349 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-07 03:34:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2019-10-07 03:34:42,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 3878. [2019-10-07 03:34:42,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3878 states. [2019-10-07 03:34:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 5866 transitions. [2019-10-07 03:34:42,474 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 5866 transitions. Word has length 115 [2019-10-07 03:34:42,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:34:42,475 INFO L462 AbstractCegarLoop]: Abstraction has 3878 states and 5866 transitions. [2019-10-07 03:34:42,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:34:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 5866 transitions. [2019-10-07 03:34:42,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-07 03:34:42,483 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:34:42,483 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:34:42,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:42,687 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:34:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:34:42,688 INFO L82 PathProgramCache]: Analyzing trace with hash -396499717, now seen corresponding path program 1 times [2019-10-07 03:34:42,688 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:34:42,688 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:42,688 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:42,688 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:34:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:34:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:34:43,174 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:34:43,174 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:34:43,175 INFO L95 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 [2019-10-07 03:34:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:34:43,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:34:43,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:34:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:34:43,392 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:34:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 03:34:43,563 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:34:43,613 INFO L162 IcfgInterpreter]: Started Sifa with 163 locations of interest [2019-10-07 03:34:43,613 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:34:43,621 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:34:43,631 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:34:43,632 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:34:43,823 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 53 for LOIs [2019-10-07 03:34:44,182 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-07 03:34:44,300 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 34 [2019-10-07 03:34:44,397 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-07 03:34:44,528 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 27 [2019-10-07 03:34:44,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:34:44,950 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 03:34:44,957 INFO L168 Benchmark]: Toolchain (without parser) took 39054.83 ms. Allocated memory was 138.4 MB in the beginning and 547.4 MB in the end (delta: 408.9 MB). Free memory was 98.7 MB in the beginning and 270.4 MB in the end (delta: -171.7 MB). Peak memory consumption was 237.3 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:44,958 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:34:44,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1215.46 ms. Allocated memory was 138.4 MB in the beginning and 206.0 MB in the end (delta: 67.6 MB). Free memory was 98.5 MB in the beginning and 130.0 MB in the end (delta: -31.5 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:44,962 INFO L168 Benchmark]: Boogie Preprocessor took 226.00 ms. Allocated memory is still 206.0 MB. Free memory was 130.0 MB in the beginning and 119.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:44,963 INFO L168 Benchmark]: RCFGBuilder took 20592.74 ms. Allocated memory was 206.0 MB in the beginning and 298.8 MB in the end (delta: 92.8 MB). Free memory was 119.6 MB in the beginning and 98.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 136.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:44,964 INFO L168 Benchmark]: TraceAbstraction took 17015.22 ms. Allocated memory was 298.8 MB in the beginning and 547.4 MB in the end (delta: 248.5 MB). Free memory was 98.2 MB in the beginning and 270.4 MB in the end (delta: -172.2 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. [2019-10-07 03:34:44,968 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1215.46 ms. Allocated memory was 138.4 MB in the beginning and 206.0 MB in the end (delta: 67.6 MB). Free memory was 98.5 MB in the beginning and 130.0 MB in the end (delta: -31.5 MB). Peak memory consumption was 41.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 226.00 ms. Allocated memory is still 206.0 MB. Free memory was 130.0 MB in the beginning and 119.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 20592.74 ms. Allocated memory was 206.0 MB in the beginning and 298.8 MB in the end (delta: 92.8 MB). Free memory was 119.6 MB in the beginning and 98.2 MB in the end (delta: 21.4 MB). Peak memory consumption was 136.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17015.22 ms. Allocated memory was 298.8 MB in the beginning and 547.4 MB in the end (delta: 248.5 MB). Free memory was 98.2 MB in the beginning and 270.4 MB in the end (delta: -172.2 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...