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_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:34,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:34,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:34,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:34,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:34,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:34,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:34,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:34,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:34,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:34,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:34,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:34,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:34,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:34,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:34,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:34,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:34,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:34,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:34,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:34,332 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 [2019-10-15 01:56:34,365 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:34,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:34,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:34,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:34,370 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:34,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:34,371 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:34,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:34,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:34,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:34,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:34,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:34,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:34,372 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:34,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:34,375 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:34,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:34,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:34,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:34,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:34,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:34,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:34,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:34,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:34,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:34,377 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:34,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:34,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:34,377 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 [2019-10-15 01:56:34,695 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:34,719 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:34,722 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:34,724 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:34,724 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:34,725 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label49.c [2019-10-15 01:56:34,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77ff8595/7e83ae1668c04e54b78cf26ba6c22419/FLAG000464284 [2019-10-15 01:56:35,472 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:35,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label49.c [2019-10-15 01:56:35,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77ff8595/7e83ae1668c04e54b78cf26ba6c22419/FLAG000464284 [2019-10-15 01:56:35,706 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a77ff8595/7e83ae1668c04e54b78cf26ba6c22419 [2019-10-15 01:56:35,717 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:35,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:35,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:35,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:35,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:35,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:35" (1/1) ... [2019-10-15 01:56:35,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac9f523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:35, skipping insertion in model container [2019-10-15 01:56:35,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:35" (1/1) ... [2019-10-15 01:56:35,742 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:35,835 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:36,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:36,816 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:37,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:37,070 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:37,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37 WrapperNode [2019-10-15 01:56:37,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:37,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:37,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:37,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:37,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,242 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (1/1) ... [2019-10-15 01:56:37,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:37,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:37,258 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:37,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:37,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (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 [2019-10-15 01:56:37,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:37,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:37,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:37,333 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:37,333 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:37,333 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:37,334 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:53,999 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:53,999 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:54,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:54 BoogieIcfgContainer [2019-10-15 01:56:54,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:54,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:54,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:54,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:54,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:35" (1/3) ... [2019-10-15 01:56:54,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b181427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:54, skipping insertion in model container [2019-10-15 01:56:54,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:37" (2/3) ... [2019-10-15 01:56:54,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b181427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:54, skipping insertion in model container [2019-10-15 01:56:54,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:54" (3/3) ... [2019-10-15 01:56:54,016 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label49.c [2019-10-15 01:56:54,026 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:54,035 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:54,046 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:54,079 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:54,079 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:54,080 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:54,080 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:54,080 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:54,080 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:54,080 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:54,080 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:54,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:54,111 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:54,112 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:54,114 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:54,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:54,121 INFO L82 PathProgramCache]: Analyzing trace with hash 863568191, now seen corresponding path program 1 times [2019-10-15 01:56:54,131 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:54,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729623831] [2019-10-15 01:56:54,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:54,132 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:54,132 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:54,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:54,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729623831] [2019-10-15 01:56:54,422 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:54,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:56:54,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763378326] [2019-10-15 01:56:54,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:56:54,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:56:54,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:56:54,454 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:56:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:56:57,542 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:56:57,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:56:57,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:56:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:56:57,568 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:56:57,568 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:56:57,586 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:56:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:56:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 468. [2019-10-15 01:56:57,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2019-10-15 01:56:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 853 transitions. [2019-10-15 01:56:57,689 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 853 transitions. Word has length 11 [2019-10-15 01:56:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:56:57,690 INFO L462 AbstractCegarLoop]: Abstraction has 468 states and 853 transitions. [2019-10-15 01:56:57,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:56:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 853 transitions. [2019-10-15 01:56:57,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-15 01:56:57,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:57,693 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:57,693 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:57,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:57,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1777186902, now seen corresponding path program 1 times [2019-10-15 01:56:57,694 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:57,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760473521] [2019-10-15 01:56:57,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:57,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:57,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:56:57,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760473521] [2019-10-15 01:56:57,869 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:57,869 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:56:57,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615975660] [2019-10-15 01:56:57,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:56:57,874 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:56:57,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:56:57,875 INFO L87 Difference]: Start difference. First operand 468 states and 853 transitions. Second operand 6 states. [2019-10-15 01:57:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:00,040 INFO L93 Difference]: Finished difference Result 1410 states and 2605 transitions. [2019-10-15 01:57:00,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:00,041 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-10-15 01:57:00,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:00,051 INFO L225 Difference]: With dead ends: 1410 [2019-10-15 01:57:00,052 INFO L226 Difference]: Without dead ends: 947 [2019-10-15 01:57:00,058 INFO L600 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 [2019-10-15 01:57:00,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2019-10-15 01:57:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 924. [2019-10-15 01:57:00,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 924 states. [2019-10-15 01:57:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1604 transitions. [2019-10-15 01:57:00,172 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1604 transitions. Word has length 22 [2019-10-15 01:57:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:00,173 INFO L462 AbstractCegarLoop]: Abstraction has 924 states and 1604 transitions. [2019-10-15 01:57:00,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:00,173 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1604 transitions. [2019-10-15 01:57:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:57:00,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:00,175 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:00,176 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash -962035583, now seen corresponding path program 1 times [2019-10-15 01:57:00,177 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:00,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688568642] [2019-10-15 01:57:00,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:00,180 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:00,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:00,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688568642] [2019-10-15 01:57:00,337 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:00,337 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:57:00,337 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223288385] [2019-10-15 01:57:00,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:00,338 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:57:00,341 INFO L87 Difference]: Start difference. First operand 924 states and 1604 transitions. Second operand 5 states. [2019-10-15 01:57:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:02,387 INFO L93 Difference]: Finished difference Result 2556 states and 4514 transitions. [2019-10-15 01:57:02,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:02,389 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-15 01:57:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:02,400 INFO L225 Difference]: With dead ends: 2556 [2019-10-15 01:57:02,410 INFO L226 Difference]: Without dead ends: 1637 [2019-10-15 01:57:02,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:57:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2019-10-15 01:57:02,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1605. [2019-10-15 01:57:02,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1605 states. [2019-10-15 01:57:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2404 transitions. [2019-10-15 01:57:02,494 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2404 transitions. Word has length 23 [2019-10-15 01:57:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:02,495 INFO L462 AbstractCegarLoop]: Abstraction has 1605 states and 2404 transitions. [2019-10-15 01:57:02,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2404 transitions. [2019-10-15 01:57:02,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 01:57:02,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:02,501 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:02,501 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:02,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1706761348, now seen corresponding path program 1 times [2019-10-15 01:57:02,502 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:02,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723569951] [2019-10-15 01:57:02,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:02,503 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:02,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:57:02,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723569951] [2019-10-15 01:57:02,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179957343] [2019-10-15 01:57:02,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:02,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:02,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:57:02,897 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:57:02,959 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:57:02,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-15 01:57:02,960 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640329318] [2019-10-15 01:57:02,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:57:02,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:57:02,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:57:02,962 INFO L87 Difference]: Start difference. First operand 1605 states and 2404 transitions. Second operand 4 states. [2019-10-15 01:57:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:05,559 INFO L93 Difference]: Finished difference Result 5917 states and 8818 transitions. [2019-10-15 01:57:05,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:57:05,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 92 [2019-10-15 01:57:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:05,591 INFO L225 Difference]: With dead ends: 5917 [2019-10-15 01:57:05,591 INFO L226 Difference]: Without dead ends: 4317 [2019-10-15 01:57:05,599 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:57:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4317 states. [2019-10-15 01:57:05,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4317 to 4150. [2019-10-15 01:57:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4150 states. [2019-10-15 01:57:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 5465 transitions. [2019-10-15 01:57:05,793 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 5465 transitions. Word has length 92 [2019-10-15 01:57:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:05,796 INFO L462 AbstractCegarLoop]: Abstraction has 4150 states and 5465 transitions. [2019-10-15 01:57:05,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:57:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 5465 transitions. [2019-10-15 01:57:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-15 01:57:05,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:05,808 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:06,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:06,013 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:06,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1378196599, now seen corresponding path program 1 times [2019-10-15 01:57:06,014 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:06,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226912817] [2019-10-15 01:57:06,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:06,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:06,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:06,268 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:06,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226912817] [2019-10-15 01:57:06,270 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:06,270 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:06,270 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076299411] [2019-10-15 01:57:06,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:06,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:06,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:06,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:06,273 INFO L87 Difference]: Start difference. First operand 4150 states and 5465 transitions. Second operand 6 states. [2019-10-15 01:57:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:08,407 INFO L93 Difference]: Finished difference Result 8674 states and 11553 transitions. [2019-10-15 01:57:08,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:08,408 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 115 [2019-10-15 01:57:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:08,432 INFO L225 Difference]: With dead ends: 8674 [2019-10-15 01:57:08,432 INFO L226 Difference]: Without dead ends: 4529 [2019-10-15 01:57:08,443 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:08,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4529 states. [2019-10-15 01:57:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4529 to 4401. [2019-10-15 01:57:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4401 states. [2019-10-15 01:57:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4401 states to 4401 states and 5808 transitions. [2019-10-15 01:57:08,570 INFO L78 Accepts]: Start accepts. Automaton has 4401 states and 5808 transitions. Word has length 115 [2019-10-15 01:57:08,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:08,571 INFO L462 AbstractCegarLoop]: Abstraction has 4401 states and 5808 transitions. [2019-10-15 01:57:08,572 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4401 states and 5808 transitions. [2019-10-15 01:57:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-15 01:57:08,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:08,579 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:08,579 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:08,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:08,579 INFO L82 PathProgramCache]: Analyzing trace with hash 345652897, now seen corresponding path program 1 times [2019-10-15 01:57:08,580 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:08,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310224980] [2019-10-15 01:57:08,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:08,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:08,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:08,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:08,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310224980] [2019-10-15 01:57:08,764 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:08,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:08,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681190103] [2019-10-15 01:57:08,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:08,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:08,766 INFO L87 Difference]: Start difference. First operand 4401 states and 5808 transitions. Second operand 6 states. [2019-10-15 01:57:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:11,140 INFO L93 Difference]: Finished difference Result 9967 states and 13392 transitions. [2019-10-15 01:57:11,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:11,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-10-15 01:57:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:11,165 INFO L225 Difference]: With dead ends: 9967 [2019-10-15 01:57:11,165 INFO L226 Difference]: Without dead ends: 5571 [2019-10-15 01:57:11,178 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:11,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2019-10-15 01:57:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5528. [2019-10-15 01:57:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5528 states. [2019-10-15 01:57:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5528 states to 5528 states and 7375 transitions. [2019-10-15 01:57:11,322 INFO L78 Accepts]: Start accepts. Automaton has 5528 states and 7375 transitions. Word has length 135 [2019-10-15 01:57:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:11,323 INFO L462 AbstractCegarLoop]: Abstraction has 5528 states and 7375 transitions. [2019-10-15 01:57:11,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 5528 states and 7375 transitions. [2019-10-15 01:57:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:57:11,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:11,326 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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, 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] [2019-10-15 01:57:11,327 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash -552315495, now seen corresponding path program 1 times [2019-10-15 01:57:11,327 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:11,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762972574] [2019-10-15 01:57:11,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:11,328 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:11,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 73 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:57:11,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762972574] [2019-10-15 01:57:11,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080270180] [2019-10-15 01:57:11,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:11,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:11,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:11,700 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:11,789 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 73 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:57:11,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916478976] [2019-10-15 01:57:11,821 INFO L162 IcfgInterpreter]: Started Sifa with 77 locations of interest [2019-10-15 01:57:11,821 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:57:11,828 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:57:11,836 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:57:11,837 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:57:12,114 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-15 01:57:12,248 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54