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/Problem02_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:42:45,912 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:42:45,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:42:45,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:42:45,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:42:45,993 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 01:42:46,014 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:42:46,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:42:46,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:42:46,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:42:46,016 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:42:46,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:42:46,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:42:46,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:42:46,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:42:46,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:42:46,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:42:46,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:42:46,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:42:46,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:42:46,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:42:46,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:42:46,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:42:46,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:42:46,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:42:46,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:42:46,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:42:46,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:42:46,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:42:46,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:42:46,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:42:46,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:42:46,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:42:46,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:42:46,022 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 01:42:46,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:42:46,356 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:42:46,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:42:46,362 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:42:46,362 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:42:46,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label49.c [2019-10-15 01:42:46,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed671cbcc/a04fbfdab22f412fa38a367fa3aedae1/FLAGa6eb9275b [2019-10-15 01:42:47,000 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:42:47,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label49.c [2019-10-15 01:42:47,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed671cbcc/a04fbfdab22f412fa38a367fa3aedae1/FLAGa6eb9275b [2019-10-15 01:42:47,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed671cbcc/a04fbfdab22f412fa38a367fa3aedae1 [2019-10-15 01:42:47,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:42:47,278 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:42:47,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:47,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:42:47,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:42:47,284 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:47" (1/1) ... [2019-10-15 01:42:47,286 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ecaa57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:47, skipping insertion in model container [2019-10-15 01:42:47,286 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:42:47" (1/1) ... [2019-10-15 01:42:47,294 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:42:47,356 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:42:47,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:47,865 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:42:48,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:42:48,021 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:42:48,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48 WrapperNode [2019-10-15 01:42:48,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:42:48,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:42:48,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:42:48,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:42:48,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (1/1) ... [2019-10-15 01:42:48,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:42:48,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:42:48,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:42:48,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:42:48,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (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 01:42:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:42:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:42:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:42:48,189 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:42:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:42:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:42:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:42:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:42:48,190 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:42:48,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:42:48,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:42:50,346 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:42:50,346 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:42:50,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:50 BoogieIcfgContainer [2019-10-15 01:42:50,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:42:50,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:42:50,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:42:50,355 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:42:50,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:42:47" (1/3) ... [2019-10-15 01:42:50,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f7ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:50, skipping insertion in model container [2019-10-15 01:42:50,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:42:48" (2/3) ... [2019-10-15 01:42:50,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50f7ea4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:42:50, skipping insertion in model container [2019-10-15 01:42:50,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:42:50" (3/3) ... [2019-10-15 01:42:50,365 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label49.c [2019-10-15 01:42:50,379 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:42:50,389 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:42:50,400 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:42:50,427 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:42:50,427 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:42:50,428 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:42:50,428 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:42:50,429 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:42:50,429 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:42:50,429 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:42:50,430 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:42:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:42:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:42:50,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:50,474 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:50,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:50,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash -219359177, now seen corresponding path program 1 times [2019-10-15 01:42:50,489 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:50,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586300853] [2019-10-15 01:42:50,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:50,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:50,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:50,918 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 01:42:50,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586300853] [2019-10-15 01:42:50,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:50,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:50,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090870970] [2019-10-15 01:42:50,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:50,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:50,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:50,945 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:42:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:51,505 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:42:51,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:51,508 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:42:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:51,564 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:42:51,564 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:42:51,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:42:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:42:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:42:51,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:42:51,664 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:42:51,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:51,666 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:42:51,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:42:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:42:51,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:51,681 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] [2019-10-15 01:42:51,681 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:51,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:51,682 INFO L82 PathProgramCache]: Analyzing trace with hash -701893956, now seen corresponding path program 1 times [2019-10-15 01:42:51,683 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:51,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121235143] [2019-10-15 01:42:51,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:51,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:51,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:51,891 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 01:42:51,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121235143] [2019-10-15 01:42:51,892 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:51,892 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:42:51,892 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777252418] [2019-10-15 01:42:51,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:42:51,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:51,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:42:51,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:51,896 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:42:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:52,348 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-15 01:42:52,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:42:52,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:42:52,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:52,354 INFO L225 Difference]: With dead ends: 513 [2019-10-15 01:42:52,354 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:42:52,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:42:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:42:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-15 01:42:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-15 01:42:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 575 transitions. [2019-10-15 01:42:52,379 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 575 transitions. Word has length 94 [2019-10-15 01:42:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:52,380 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 575 transitions. [2019-10-15 01:42:52,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:42:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 575 transitions. [2019-10-15 01:42:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 01:42:52,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:52,383 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:42:52,383 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:52,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:52,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1307297633, now seen corresponding path program 1 times [2019-10-15 01:42:52,384 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:52,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995473856] [2019-10-15 01:42:52,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:52,385 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:52,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:52,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995473856] [2019-10-15 01:42:52,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:42:52,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:42:52,493 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020473046] [2019-10-15 01:42:52,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:42:52,494 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:52,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:42:52,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:42:52,495 INFO L87 Difference]: Start difference. First operand 343 states and 575 transitions. Second operand 6 states. [2019-10-15 01:42:53,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:53,213 INFO L93 Difference]: Finished difference Result 1059 states and 1887 transitions. [2019-10-15 01:42:53,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:42:53,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 01:42:53,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:53,224 INFO L225 Difference]: With dead ends: 1059 [2019-10-15 01:42:53,225 INFO L226 Difference]: Without dead ends: 721 [2019-10-15 01:42:53,229 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 01:42:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2019-10-15 01:42:53,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 703. [2019-10-15 01:42:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703 states. [2019-10-15 01:42:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1169 transitions. [2019-10-15 01:42:53,293 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1169 transitions. Word has length 108 [2019-10-15 01:42:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:53,293 INFO L462 AbstractCegarLoop]: Abstraction has 703 states and 1169 transitions. [2019-10-15 01:42:53,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:42:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1169 transitions. [2019-10-15 01:42:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-15 01:42:53,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:53,298 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:42:53,298 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash -89304076, now seen corresponding path program 1 times [2019-10-15 01:42:53,299 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:53,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834155232] [2019-10-15 01:42:53,299 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:53,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:53,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:53,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834155232] [2019-10-15 01:42:53,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816611138] [2019-10-15 01:42:53,424 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 01:42:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:53,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:53,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:53,678 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:53,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2086389562] [2019-10-15 01:42:53,841 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:53,842 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:53,848 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:53,856 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:53,857 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:54,171 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:54,831 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 132 [2019-10-15 01:42:56,528 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 87 for LOIs [2019-10-15 01:43:05,294 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:43:05,459 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 16288 conjuctions. This might take some time... [2019-10-15 01:43:06,378 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2019-10-15 01:43:06,795 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 26976 conjuctions. This might take some time... [2019-10-15 01:43:08,179 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2019-10-15 01:43:08,549 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 26976 conjuctions. This might take some time... [2019-10-15 01:43:09,968 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:43:09,979 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:43:10,248 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 80 [2019-10-15 01:43:10,476 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:43:10,788 WARN L191 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:43:11,084 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 76 [2019-10-15 01:43:11,622 WARN L191 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2019-10-15 01:43:11,898 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 73 [2019-10-15 01:43:12,138 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2019-10-15 01:43:12,417 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2019-10-15 01:43:12,981 WARN L191 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 75 [2019-10-15 01:43:13,556 WARN L191 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 77 [2019-10-15 01:43:13,811 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 72 [2019-10-15 01:43:17,783 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:43:17,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5, 12] total 25 [2019-10-15 01:43:17,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756955098] [2019-10-15 01:43:17,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:43:17,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:43:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:43:17,786 INFO L87 Difference]: Start difference. First operand 703 states and 1169 transitions. Second operand 25 states. [2019-10-15 01:43:18,091 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:43:18,453 WARN L191 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-10-15 01:43:18,832 WARN L191 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 99 [2019-10-15 01:43:19,244 WARN L191 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2019-10-15 01:43:19,582 WARN L191 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 93 [2019-10-15 01:43:19,958 WARN L191 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 95 [2019-10-15 01:43:21,356 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2019-10-15 01:43:21,676 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2019-10-15 01:43:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:26,378 INFO L93 Difference]: Finished difference Result 2274 states and 4214 transitions. [2019-10-15 01:43:26,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:43:26,379 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2019-10-15 01:43:26,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:26,414 INFO L225 Difference]: With dead ends: 2274 [2019-10-15 01:43:26,414 INFO L226 Difference]: Without dead ends: 1576 [2019-10-15 01:43:26,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 281 SyntacticMatches, 98 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:43:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2019-10-15 01:43:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1306. [2019-10-15 01:43:26,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2019-10-15 01:43:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2216 transitions. [2019-10-15 01:43:26,561 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2216 transitions. Word has length 127 [2019-10-15 01:43:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:26,562 INFO L462 AbstractCegarLoop]: Abstraction has 1306 states and 2216 transitions. [2019-10-15 01:43:26,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:43:26,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2216 transitions. [2019-10-15 01:43:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:43:26,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:26,575 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 01:43:26,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:26,790 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1326221098, now seen corresponding path program 1 times [2019-10-15 01:43:26,791 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:26,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373860579] [2019-10-15 01:43:26,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:26,792 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:26,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:43:26,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373860579] [2019-10-15 01:43:26,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262020742] [2019-10-15 01:43:26,943 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)