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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:41:51,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:41:51,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:41:51,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:41:51,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:41:51,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:41:51,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:41:51,608 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 01:41:51,637 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:41:51,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:41:51,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:41:51,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:41:51,642 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:41:51,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:41:51,642 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:41:51,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:41:51,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:41:51,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:41:51,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:41:51,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:41:51,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:41:51,645 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:41:51,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:41:51,646 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:41:51,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:41:51,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:41:51,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:41:51,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:41:51,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:41:51,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:41:51,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:41:51,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:41:51,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:41:51,652 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:41:51,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:41:51,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:41:51,653 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 01:41:51,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:41:51,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:41:51,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:41:51,955 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:41:51,956 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:41:51,957 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label23.c [2019-10-15 01:41:52,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fd20a51/d6d98c4d5df4400f83b31bab857d8079/FLAGe0b89b036 [2019-10-15 01:41:52,540 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:41:52,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label23.c [2019-10-15 01:41:52,564 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fd20a51/d6d98c4d5df4400f83b31bab857d8079/FLAGe0b89b036 [2019-10-15 01:41:52,876 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04fd20a51/d6d98c4d5df4400f83b31bab857d8079 [2019-10-15 01:41:52,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:41:52,889 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:41:52,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:52,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:41:52,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:41:52,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:52" (1/1) ... [2019-10-15 01:41:52,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d15200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:52, skipping insertion in model container [2019-10-15 01:41:52,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:41:52" (1/1) ... [2019-10-15 01:41:52,907 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:41:52,979 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:41:53,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:53,555 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:41:53,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:41:53,715 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:41:53,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53 WrapperNode [2019-10-15 01:41:53,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:41:53,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:41:53,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:41:53,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:41:53,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,764 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (1/1) ... [2019-10-15 01:41:53,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:41:53,836 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:41:53,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:41:53,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:41:53,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (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 01:41:53,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:41:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:41:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:41:53,928 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:41:53,928 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:41:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:41:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:41:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:41:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:41:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:41:53,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:41:56,057 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:41:56,057 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:41:56,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:56 BoogieIcfgContainer [2019-10-15 01:41:56,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:41:56,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:41:56,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:41:56,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:41:56,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:41:52" (1/3) ... [2019-10-15 01:41:56,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abe5629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:56, skipping insertion in model container [2019-10-15 01:41:56,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:41:53" (2/3) ... [2019-10-15 01:41:56,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@abe5629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:41:56, skipping insertion in model container [2019-10-15 01:41:56,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:41:56" (3/3) ... [2019-10-15 01:41:56,068 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label23.c [2019-10-15 01:41:56,078 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:41:56,087 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:41:56,098 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:41:56,125 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:41:56,126 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:41:56,126 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:41:56,126 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:41:56,126 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:41:56,126 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:41:56,127 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:41:56,127 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:41:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-15 01:41:56,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-15 01:41:56,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:56,163 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 01:41:56,166 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:56,172 INFO L82 PathProgramCache]: Analyzing trace with hash -219357129, now seen corresponding path program 1 times [2019-10-15 01:41:56,181 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:56,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065873020] [2019-10-15 01:41:56,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:56,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:56,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:56,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:56,613 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 01:41:56,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065873020] [2019-10-15 01:41:56,614 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:41:56,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:41:56,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082120888] [2019-10-15 01:41:56,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:56,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:56,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:56,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:41:56,639 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-15 01:41:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:57,288 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-15 01:41:57,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:57,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-15 01:41:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:57,313 INFO L225 Difference]: With dead ends: 273 [2019-10-15 01:41:57,314 INFO L226 Difference]: Without dead ends: 175 [2019-10-15 01:41:57,320 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 01:41:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-15 01:41:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-15 01:41:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-15 01:41:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-15 01:41:57,419 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-15 01:41:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:57,420 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-15 01:41:57,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-15 01:41:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-15 01:41:57,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:57,425 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 01:41:57,426 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:57,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:57,426 INFO L82 PathProgramCache]: Analyzing trace with hash -701891908, now seen corresponding path program 1 times [2019-10-15 01:41:57,427 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:57,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680592271] [2019-10-15 01:41:57,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:57,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:57,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:41:57,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680592271] [2019-10-15 01:41:57,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325669842] [2019-10-15 01:41:57,571 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 01:41:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:57,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:41:57,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:57,750 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 01:41:57,750 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:57,797 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 01:41:57,797 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:41:57,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:41:57,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978768069] [2019-10-15 01:41:57,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:41:57,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:41:57,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:41:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:57,801 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-15 01:41:58,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:41:58,237 INFO L93 Difference]: Finished difference Result 345 states and 627 transitions. [2019-10-15 01:41:58,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:41:58,238 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-15 01:41:58,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:41:58,242 INFO L225 Difference]: With dead ends: 345 [2019-10-15 01:41:58,243 INFO L226 Difference]: Without dead ends: 343 [2019-10-15 01:41:58,244 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:41:58,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-15 01:41:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 259. [2019-10-15 01:41:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-15 01:41:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 475 transitions. [2019-10-15 01:41:58,263 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 475 transitions. Word has length 94 [2019-10-15 01:41:58,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:41:58,264 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 475 transitions. [2019-10-15 01:41:58,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:41:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 475 transitions. [2019-10-15 01:41:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-15 01:41:58,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:41:58,267 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:41:58,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:41:58,472 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:41:58,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:41:58,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1800548212, now seen corresponding path program 1 times [2019-10-15 01:41:58,474 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:41:58,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823309641] [2019-10-15 01:41:58,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:58,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:41:58,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:41:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:58,628 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:58,628 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823309641] [2019-10-15 01:41:58,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944269042] [2019-10-15 01:41:58,629 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 01:41:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:41:58,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:41:58,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:41:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:58,781 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:41:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:41:58,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233059038] [2019-10-15 01:41:58,938 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:41:58,938 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:41:58,945 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:41:58,953 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:41:58,954 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:41:59,270 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs [2019-10-15 01:42:01,133 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 127 [2019-10-15 01:42:01,446 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 85 for LOIs [2019-10-15 01:42:09,401 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 22 [2019-10-15 01:42:09,483 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10208 conjuctions. This might take some time... [2019-10-15 01:42:09,921 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2019-10-15 01:42:10,336 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 26504 conjuctions. This might take some time... [2019-10-15 01:42:11,257 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2019-10-15 01:42:11,618 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 26504 conjuctions. This might take some time... [2019-10-15 01:42:12,547 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 52 for LOIs [2019-10-15 01:42:12,560 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:42:12,818 WARN L191 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 78 [2019-10-15 01:42:13,073 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 53 [2019-10-15 01:42:13,371 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 67 [2019-10-15 01:42:13,649 WARN L191 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2019-10-15 01:42:13,970 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2019-10-15 01:42:14,237 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2019-10-15 01:42:14,449 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2019-10-15 01:42:14,684 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2019-10-15 01:42:14,959 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2019-10-15 01:42:15,570 WARN L191 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 81 [2019-10-15 01:42:15,794 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2019-10-15 01:42:19,155 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:42:19,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 12] total 22 [2019-10-15 01:42:19,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340630506] [2019-10-15 01:42:19,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:42:19,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:42:19,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:42:19,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:42:19,159 INFO L87 Difference]: Start difference. First operand 259 states and 475 transitions. Second operand 22 states. [2019-10-15 01:42:19,485 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-10-15 01:42:19,866 WARN L191 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 93 [2019-10-15 01:42:20,284 WARN L191 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 100 [2019-10-15 01:42:20,752 WARN L191 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2019-10-15 01:42:21,103 WARN L191 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 93 [2019-10-15 01:42:21,481 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 95 [2019-10-15 01:42:21,695 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:42:21,927 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-10-15 01:42:22,160 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2019-10-15 01:42:22,445 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-10-15 01:42:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:42:29,099 INFO L93 Difference]: Finished difference Result 1637 states and 3187 transitions. [2019-10-15 01:42:29,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 01:42:29,101 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 124 [2019-10-15 01:42:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:42:29,114 INFO L225 Difference]: With dead ends: 1637 [2019-10-15 01:42:29,115 INFO L226 Difference]: Without dead ends: 1383 [2019-10-15 01:42:29,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 280 SyntacticMatches, 93 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=578, Invalid=3082, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 01:42:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2019-10-15 01:42:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1350. [2019-10-15 01:42:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1350 states. [2019-10-15 01:42:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2158 transitions. [2019-10-15 01:42:29,245 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2158 transitions. Word has length 124 [2019-10-15 01:42:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:42:29,245 INFO L462 AbstractCegarLoop]: Abstraction has 1350 states and 2158 transitions. [2019-10-15 01:42:29,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:42:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2158 transitions. [2019-10-15 01:42:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 01:42:29,253 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:42:29,253 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-15 01:42:29,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:29,458 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:42:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:42:29,459 INFO L82 PathProgramCache]: Analyzing trace with hash 380165928, now seen corresponding path program 1 times [2019-10-15 01:42:29,459 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:42:29,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662274288] [2019-10-15 01:42:29,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:29,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:42:29,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:42:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:42:29,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662274288] [2019-10-15 01:42:29,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821172160] [2019-10-15 01:42:29,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:42:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:42:29,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:42:29,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:42:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:29,950 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:42:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:42:30,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191422572] [2019-10-15 01:42:30,031 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-15 01:42:30,031 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:42:30,032 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:42:30,033 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:42:30,033 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:42:30,146 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 89 for LOIs