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_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 03:31:34,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 03:31:34,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 03:31:34,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-07 03:31:34,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 03:31:34,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 03:31:34,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 03:31:34,589 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 03:31:34,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 03:31:34,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 03:31:34,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 03:31:34,605 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 03:31:34,605 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 03:31:34,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 03:31:34,606 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 03:31:34,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 03:31:34,606 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 03:31:34,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 03:31:34,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 03:31:34,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 03:31:34,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 03:31:34,607 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 03:31:34,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 03:31:34,608 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 03:31:34,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 03:31:34,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 03:31:34,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 03:31:34,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 03:31:34,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 03:31:34,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 03:31:34,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 03:31:34,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 03:31:34,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 03:31:34,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 03:31:34,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 03:31:34,611 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 03:31:34,611 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 03:31:34,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 03:31:34,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 03:31:34,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 03:31:34,974 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 03:31:34,974 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 03:31:34,975 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-07 03:31:35,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f5b4b45/d94534b2d07147c7b073019d23064aae/FLAG85f951011 [2019-10-07 03:31:35,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 03:31:35,662 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-10-07 03:31:35,693 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f5b4b45/d94534b2d07147c7b073019d23064aae/FLAG85f951011 [2019-10-07 03:31:35,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34f5b4b45/d94534b2d07147c7b073019d23064aae [2019-10-07 03:31:35,922 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 03:31:35,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 03:31:35,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 03:31:35,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 03:31:35,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 03:31:35,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:31:35" (1/1) ... [2019-10-07 03:31:35,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6912290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:35, skipping insertion in model container [2019-10-07 03:31:35,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 03:31:35" (1/1) ... [2019-10-07 03:31:35,939 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 03:31:36,012 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 03:31:36,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:31:36,908 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 03:31:37,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 03:31:37,242 INFO L192 MainTranslator]: Completed translation [2019-10-07 03:31:37,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37 WrapperNode [2019-10-07 03:31:37,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 03:31:37,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 03:31:37,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 03:31:37,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 03:31:37,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (1/1) ... [2019-10-07 03:31:37,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 03:31:37,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 03:31:37,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 03:31:37,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 03:31:37,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (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 03:31:37,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 03:31:37,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 03:31:37,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 03:31:37,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-07 03:31:37,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 03:31:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 03:31:37,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-07 03:31:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 03:31:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 03:31:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 03:31:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 03:31:37,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 03:31:37,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 03:31:56,754 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 03:31:56,754 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 03:31:56,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:31:56 BoogieIcfgContainer [2019-10-07 03:31:56,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 03:31:56,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 03:31:56,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 03:31:56,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 03:31:56,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 03:31:35" (1/3) ... [2019-10-07 03:31:56,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fed6e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:31:56, skipping insertion in model container [2019-10-07 03:31:56,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 03:31:37" (2/3) ... [2019-10-07 03:31:56,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fed6e7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 03:31:56, skipping insertion in model container [2019-10-07 03:31:56,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 03:31:56" (3/3) ... [2019-10-07 03:31:56,768 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-10-07 03:31:56,776 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 03:31:56,784 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 03:31:56,796 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 03:31:56,827 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 03:31:56,827 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 03:31:56,827 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 03:31:56,827 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 03:31:56,828 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 03:31:56,828 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 03:31:56,828 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 03:31:56,828 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 03:31:56,855 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-07 03:31:56,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-07 03:31:56,861 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:56,862 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:56,864 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash 863567679, now seen corresponding path program 1 times [2019-10-07 03:31:56,881 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:56,881 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:56,881 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:56,881 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:56,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:57,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:57,133 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 03:31:57,134 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:57,134 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:57,135 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 03:31:57,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 03:31:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 03:31:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 03:31:57,156 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-07 03:31:59,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:31:59,070 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-07 03:31:59,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 03:31:59,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-07 03:31:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:31:59,101 INFO L225 Difference]: With dead ends: 718 [2019-10-07 03:31:59,102 INFO L226 Difference]: Without dead ends: 471 [2019-10-07 03:31:59,109 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 03:31:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-07 03:31:59,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2019-10-07 03:31:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-07 03:31:59,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 881 transitions. [2019-10-07 03:31:59,193 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 881 transitions. Word has length 11 [2019-10-07 03:31:59,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:31:59,194 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 881 transitions. [2019-10-07 03:31:59,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 03:31:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 881 transitions. [2019-10-07 03:31:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-07 03:31:59,197 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:31:59,198 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:31:59,198 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:31:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:31:59,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1377706598, now seen corresponding path program 1 times [2019-10-07 03:31:59,199 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:31:59,199 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:59,199 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:59,199 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:31:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:31:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:31:59,387 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 03:31:59,387 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:31:59,387 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:31:59,388 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:31:59,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:31:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:31:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:31:59,392 INFO L87 Difference]: Start difference. First operand 467 states and 881 transitions. Second operand 6 states. [2019-10-07 03:32:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:32:01,689 INFO L93 Difference]: Finished difference Result 1405 states and 2686 transitions. [2019-10-07 03:32:01,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:32:01,690 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-07 03:32:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:32:01,699 INFO L225 Difference]: With dead ends: 1405 [2019-10-07 03:32:01,699 INFO L226 Difference]: Without dead ends: 943 [2019-10-07 03:32:01,702 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-07 03:32:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2019-10-07 03:32:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 921. [2019-10-07 03:32:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 921 states. [2019-10-07 03:32:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1650 transitions. [2019-10-07 03:32:01,794 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1650 transitions. Word has length 22 [2019-10-07 03:32:01,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:32:01,794 INFO L462 AbstractCegarLoop]: Abstraction has 921 states and 1650 transitions. [2019-10-07 03:32:01,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:32:01,795 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1650 transitions. [2019-10-07 03:32:01,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-07 03:32:01,796 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:32:01,796 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] [2019-10-07 03:32:01,797 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:32:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:32:01,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1426381906, now seen corresponding path program 1 times [2019-10-07 03:32:01,797 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:32:01,798 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:01,798 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:01,799 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:32:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:01,916 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 03:32:01,916 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:01,917 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:32:01,917 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:32:01,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:32:01,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:32:01,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:32:01,919 INFO L87 Difference]: Start difference. First operand 921 states and 1650 transitions. Second operand 6 states. [2019-10-07 03:32:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:32:04,242 INFO L93 Difference]: Finished difference Result 2551 states and 4681 transitions. [2019-10-07 03:32:04,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:32:04,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-07 03:32:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:32:04,256 INFO L225 Difference]: With dead ends: 2551 [2019-10-07 03:32:04,257 INFO L226 Difference]: Without dead ends: 1635 [2019-10-07 03:32:04,260 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 03:32:04,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2019-10-07 03:32:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1561. [2019-10-07 03:32:04,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1561 states. [2019-10-07 03:32:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 2762 transitions. [2019-10-07 03:32:04,323 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 2762 transitions. Word has length 26 [2019-10-07 03:32:04,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:32:04,324 INFO L462 AbstractCegarLoop]: Abstraction has 1561 states and 2762 transitions. [2019-10-07 03:32:04,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:32:04,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 2762 transitions. [2019-10-07 03:32:04,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-07 03:32:04,326 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:32:04,327 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 03:32:04,327 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:32:04,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:32:04,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2114418835, now seen corresponding path program 1 times [2019-10-07 03:32:04,328 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:32:04,328 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:04,328 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:04,328 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:32:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:04,483 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 03:32:04,483 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:04,483 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:32:04,484 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:32:04,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:32:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:32:04,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:32:04,486 INFO L87 Difference]: Start difference. First operand 1561 states and 2762 transitions. Second operand 6 states. [2019-10-07 03:32:06,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:32:06,699 INFO L93 Difference]: Finished difference Result 3816 states and 6825 transitions. [2019-10-07 03:32:06,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:32:06,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-10-07 03:32:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:32:06,725 INFO L225 Difference]: With dead ends: 3816 [2019-10-07 03:32:06,726 INFO L226 Difference]: Without dead ends: 2260 [2019-10-07 03:32:06,734 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 03:32:06,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2019-10-07 03:32:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2240. [2019-10-07 03:32:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2240 states. [2019-10-07 03:32:06,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 3673 transitions. [2019-10-07 03:32:06,850 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 3673 transitions. Word has length 57 [2019-10-07 03:32:06,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:32:06,852 INFO L462 AbstractCegarLoop]: Abstraction has 2240 states and 3673 transitions. [2019-10-07 03:32:06,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:32:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 3673 transitions. [2019-10-07 03:32:06,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-07 03:32:06,868 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:32:06,869 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:06,869 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:32:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:32:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash 237414357, now seen corresponding path program 1 times [2019-10-07 03:32:06,870 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:32:06,870 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:06,870 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:06,870 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:32:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:07,199 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 03:32:07,200 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:07,200 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 03:32:07,201 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 03:32:07,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 03:32:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 03:32:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-07 03:32:07,203 INFO L87 Difference]: Start difference. First operand 2240 states and 3673 transitions. Second operand 6 states. [2019-10-07 03:32:15,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:32:15,513 INFO L93 Difference]: Finished difference Result 6966 states and 11942 transitions. [2019-10-07 03:32:15,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 03:32:15,514 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2019-10-07 03:32:15,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:32:15,548 INFO L225 Difference]: With dead ends: 6966 [2019-10-07 03:32:15,548 INFO L226 Difference]: Without dead ends: 4731 [2019-10-07 03:32:15,555 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-07 03:32:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2019-10-07 03:32:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 4692. [2019-10-07 03:32:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4692 states. [2019-10-07 03:32:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4692 states to 4692 states and 7725 transitions. [2019-10-07 03:32:15,710 INFO L78 Accepts]: Start accepts. Automaton has 4692 states and 7725 transitions. Word has length 101 [2019-10-07 03:32:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:32:15,712 INFO L462 AbstractCegarLoop]: Abstraction has 4692 states and 7725 transitions. [2019-10-07 03:32:15,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 03:32:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4692 states and 7725 transitions. [2019-10-07 03:32:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-07 03:32:15,717 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:32:15,718 INFO L385 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:32:15,718 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:32:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:32:15,719 INFO L82 PathProgramCache]: Analyzing trace with hash -700916422, now seen corresponding path program 1 times [2019-10-07 03:32:15,719 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:32:15,719 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:15,719 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:15,719 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:15,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:32:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 03:32:15,852 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:15,853 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:32:15,853 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 03:32:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:15,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-07 03:32:15,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:32:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-07 03:32:16,076 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:32:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-07 03:32:16,160 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 03:32:16,161 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2019-10-07 03:32:16,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 03:32:16,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 03:32:16,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-07 03:32:16,162 INFO L87 Difference]: Start difference. First operand 4692 states and 7725 transitions. Second operand 5 states. [2019-10-07 03:32:18,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 03:32:18,588 INFO L93 Difference]: Finished difference Result 10540 states and 17857 transitions. [2019-10-07 03:32:18,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 03:32:18,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-10-07 03:32:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 03:32:18,629 INFO L225 Difference]: With dead ends: 10540 [2019-10-07 03:32:18,629 INFO L226 Difference]: Without dead ends: 5853 [2019-10-07 03:32:18,649 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-07 03:32:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5853 states. [2019-10-07 03:32:18,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5853 to 5505. [2019-10-07 03:32:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5505 states. [2019-10-07 03:32:18,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8353 transitions. [2019-10-07 03:32:18,827 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8353 transitions. Word has length 126 [2019-10-07 03:32:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 03:32:18,828 INFO L462 AbstractCegarLoop]: Abstraction has 5505 states and 8353 transitions. [2019-10-07 03:32:18,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 03:32:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8353 transitions. [2019-10-07 03:32:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-07 03:32:18,834 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 03:32:18,834 INFO L385 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-10-07 03:32:19,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:32:19,050 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 03:32:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 03:32:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1405198192, now seen corresponding path program 1 times [2019-10-07 03:32:19,052 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 03:32:19,053 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:19,053 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:19,053 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 03:32:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 03:32:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 29 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-07 03:32:19,237 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 03:32:19,237 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 03:32:19,237 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 03:32:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 03:32:19,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 03:32:19,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 03:32:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-07 03:32:19,538 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 03:32:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 38 proven. 22 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-07 03:32:19,627 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 03:32:19,680 INFO L162 IcfgInterpreter]: Started Sifa with 97 locations of interest [2019-10-07 03:32:19,681 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 03:32:19,688 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 03:32:19,697 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 03:32:19,697 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 03:32:19,855 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-07 03:32:20,055 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-07 03:32:20,638 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-07 03:32:20,962 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-07 03:32:20,966 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-07 03:32:21,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 03:32:21,417 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 03:32:21,429 INFO L168 Benchmark]: Toolchain (without parser) took 45501.21 ms. Allocated memory was 144.7 MB in the beginning and 549.5 MB in the end (delta: 404.8 MB). Free memory was 98.2 MB in the beginning and 349.9 MB in the end (delta: -251.8 MB). Peak memory consumption was 153.0 MB. Max. memory is 7.1 GB. [2019-10-07 03:32:21,432 INFO L168 Benchmark]: CDTParser took 1.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 03:32:21,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1318.37 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 97.9 MB in the beginning and 127.2 MB in the end (delta: -29.2 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. [2019-10-07 03:32:21,436 INFO L168 Benchmark]: Boogie Preprocessor took 194.34 ms. Allocated memory is still 203.9 MB. Free memory was 127.2 MB in the beginning and 116.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-10-07 03:32:21,442 INFO L168 Benchmark]: RCFGBuilder took 19320.01 ms. Allocated memory was 203.9 MB in the beginning and 299.4 MB in the end (delta: 95.4 MB). Free memory was 116.3 MB in the beginning and 94.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 140.7 MB. Max. memory is 7.1 GB. [2019-10-07 03:32:21,447 INFO L168 Benchmark]: TraceAbstraction took 24663.70 ms. Allocated memory was 299.4 MB in the beginning and 549.5 MB in the end (delta: 250.1 MB). Free memory was 94.9 MB in the beginning and 349.9 MB in the end (delta: -255.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-07 03:32:21,456 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.24 ms. Allocated memory is still 144.7 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1318.37 ms. Allocated memory was 144.7 MB in the beginning and 203.9 MB in the end (delta: 59.2 MB). Free memory was 97.9 MB in the beginning and 127.2 MB in the end (delta: -29.2 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 194.34 ms. Allocated memory is still 203.9 MB. Free memory was 127.2 MB in the beginning and 116.3 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 19320.01 ms. Allocated memory was 203.9 MB in the beginning and 299.4 MB in the end (delta: 95.4 MB). Free memory was 116.3 MB in the beginning and 94.9 MB in the end (delta: 21.4 MB). Peak memory consumption was 140.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24663.70 ms. Allocated memory was 299.4 MB in the beginning and 549.5 MB in the end (delta: 250.1 MB). Free memory was 94.9 MB in the beginning and 349.9 MB in the end (delta: -255.0 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...