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/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:26,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:26,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:26,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:26,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:26,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:26,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:26,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:26,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:26,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:26,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:26,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:26,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:26,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:26,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:26,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:26,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:26,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:26,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:26,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:26,942 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 01:54:26,976 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:26,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:26,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:26,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:26,978 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:26,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:26,979 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:26,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:26,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:26,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:26,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:26,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:26,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:26,980 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:26,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:26,983 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:26,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:26,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:26,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:26,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:26,984 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:26,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:26,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:26,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:26,985 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:26,985 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:26,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:26,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:26,985 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 01:54:27,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:27,266 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:27,270 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:27,271 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:27,272 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:27,273 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-15 01:54:27,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674cfc84a/213852e00c4242e6ad61e214607840c9/FLAG5f8ac3375 [2019-10-15 01:54:27,954 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:27,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-15 01:54:27,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674cfc84a/213852e00c4242e6ad61e214607840c9/FLAG5f8ac3375 [2019-10-15 01:54:28,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674cfc84a/213852e00c4242e6ad61e214607840c9 [2019-10-15 01:54:28,173 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:28,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:28,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:28,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:28,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:28,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:28" (1/1) ... [2019-10-15 01:54:28,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:28, skipping insertion in model container [2019-10-15 01:54:28,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:28" (1/1) ... [2019-10-15 01:54:28,193 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:28,281 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:29,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:29,104 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:29,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:29,386 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:29,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29 WrapperNode [2019-10-15 01:54:29,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:29,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:29,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:29,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:29,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (1/1) ... [2019-10-15 01:54:29,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:29,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:29,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:29,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:29,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (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 01:54:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:43,161 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:43,161 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:43,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:43 BoogieIcfgContainer [2019-10-15 01:54:43,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:43,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:43,165 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:43,168 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:43,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:28" (1/3) ... [2019-10-15 01:54:43,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370c6733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:43, skipping insertion in model container [2019-10-15 01:54:43,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:29" (2/3) ... [2019-10-15 01:54:43,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@370c6733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:43, skipping insertion in model container [2019-10-15 01:54:43,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:43" (3/3) ... [2019-10-15 01:54:43,172 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-10-15 01:54:43,182 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:43,190 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:43,202 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:43,231 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:43,231 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:43,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:43,232 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:43,232 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:43,232 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:43,232 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:43,232 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:43,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:43,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:43,314 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:43,318 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash 648045165, now seen corresponding path program 1 times [2019-10-15 01:54:43,333 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:43,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051491321] [2019-10-15 01:54:43,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:43,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:43,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:43,548 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 01:54:43,549 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051491321] [2019-10-15 01:54:43,550 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:43,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:43,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085575812] [2019-10-15 01:54:43,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:43,555 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:43,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:43,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:43,572 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:49,856 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:49,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:49,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:49,886 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:49,886 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:49,895 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 01:54:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:50,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 430. [2019-10-15 01:54:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2019-10-15 01:54:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 821 transitions. [2019-10-15 01:54:50,041 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 821 transitions. Word has length 11 [2019-10-15 01:54:50,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:50,042 INFO L462 AbstractCegarLoop]: Abstraction has 430 states and 821 transitions. [2019-10-15 01:54:50,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:50,043 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 821 transitions. [2019-10-15 01:54:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:54:50,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:50,045 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:50,046 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:50,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:50,047 INFO L82 PathProgramCache]: Analyzing trace with hash 507900312, now seen corresponding path program 1 times [2019-10-15 01:54:50,048 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:50,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571351912] [2019-10-15 01:54:50,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:50,048 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:50,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:50,205 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 01:54:50,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571351912] [2019-10-15 01:54:50,206 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:50,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:50,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365745724] [2019-10-15 01:54:50,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:50,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:50,209 INFO L87 Difference]: Start difference. First operand 430 states and 821 transitions. Second operand 4 states. [2019-10-15 01:54:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:53,590 INFO L93 Difference]: Finished difference Result 1699 states and 3298 transitions. [2019-10-15 01:54:53,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:53,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:54:53,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:53,599 INFO L225 Difference]: With dead ends: 1699 [2019-10-15 01:54:53,599 INFO L226 Difference]: Without dead ends: 1274 [2019-10-15 01:54:53,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 01:54:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2019-10-15 01:54:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1243. [2019-10-15 01:54:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2019-10-15 01:54:53,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2082 transitions. [2019-10-15 01:54:53,650 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2082 transitions. Word has length 21 [2019-10-15 01:54:53,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:53,650 INFO L462 AbstractCegarLoop]: Abstraction has 1243 states and 2082 transitions. [2019-10-15 01:54:53,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:53,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2082 transitions. [2019-10-15 01:54:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 01:54:53,658 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:53,658 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:54:53,659 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:53,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1904499010, now seen corresponding path program 1 times [2019-10-15 01:54:53,659 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:53,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137558389] [2019-10-15 01:54:53,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:53,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:53,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:54:53,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137558389] [2019-10-15 01:54:53,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999824295] [2019-10-15 01:54:53,805 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 01:54:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:53,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:54:53,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:54:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:54:53,989 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:54:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:54:54,062 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:54:54,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-15 01:54:54,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202742208] [2019-10-15 01:54:54,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:54:54,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:54:54,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:54:54,064 INFO L87 Difference]: Start difference. First operand 1243 states and 2082 transitions. Second operand 5 states. [2019-10-15 01:54:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:58,631 INFO L93 Difference]: Finished difference Result 3377 states and 5740 transitions. [2019-10-15 01:54:58,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:54:58,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2019-10-15 01:54:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:58,649 INFO L225 Difference]: With dead ends: 3377 [2019-10-15 01:54:58,649 INFO L226 Difference]: Without dead ends: 2139 [2019-10-15 01:54:58,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:54:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2019-10-15 01:54:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2104. [2019-10-15 01:54:58,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2104 states. [2019-10-15 01:54:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3355 transitions. [2019-10-15 01:54:58,729 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3355 transitions. Word has length 62 [2019-10-15 01:54:58,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:58,729 INFO L462 AbstractCegarLoop]: Abstraction has 2104 states and 3355 transitions. [2019-10-15 01:54:58,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:54:58,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3355 transitions. [2019-10-15 01:54:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:54:58,735 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:58,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:58,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:54:58,949 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 549190598, now seen corresponding path program 1 times [2019-10-15 01:54:58,949 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:58,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976215753] [2019-10-15 01:54:58,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:58,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:58,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:54:59,110 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976215753] [2019-10-15 01:54:59,111 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827773306] [2019-10-15 01:54:59,111 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 01:54:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:59,255 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:54:59,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:54:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:54:59,295 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:54:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:54:59,383 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:54:59,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-15 01:54:59,384 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951391603] [2019-10-15 01:54:59,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:54:59,385 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:54:59,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:54:59,386 INFO L87 Difference]: Start difference. First operand 2104 states and 3355 transitions. Second operand 5 states. [2019-10-15 01:55:02,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:02,352 INFO L93 Difference]: Finished difference Result 6206 states and 10355 transitions. [2019-10-15 01:55:02,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:02,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-10-15 01:55:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:02,378 INFO L225 Difference]: With dead ends: 6206 [2019-10-15 01:55:02,378 INFO L226 Difference]: Without dead ends: 4107 [2019-10-15 01:55:02,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:55:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2019-10-15 01:55:02,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 2747. [2019-10-15 01:55:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2747 states. [2019-10-15 01:55:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4221 transitions. [2019-10-15 01:55:02,522 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4221 transitions. Word has length 66 [2019-10-15 01:55:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:02,525 INFO L462 AbstractCegarLoop]: Abstraction has 2747 states and 4221 transitions. [2019-10-15 01:55:02,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:02,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4221 transitions. [2019-10-15 01:55:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:55:02,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:02,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:02,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:02,747 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:02,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:02,747 INFO L82 PathProgramCache]: Analyzing trace with hash -2018364511, now seen corresponding path program 1 times [2019-10-15 01:55:02,748 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:02,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78982888] [2019-10-15 01:55:02,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:02,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:02,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:02,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78982888] [2019-10-15 01:55:02,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25135409] [2019-10-15 01:55:02,973 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 01:55:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:03,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:03,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:03,192 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:03,284 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1830414222] [2019-10-15 01:55:03,317 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:03,318 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:03,325 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:03,333 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:03,334 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:03,555 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 58 for LOIs [2019-10-15 01:55:03,776 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:55:03,871 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-15 01:55:03,963 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2019-10-15 01:55:04,364 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7251 conjuctions. This might take some time... [2019-10-15 01:55:04,501 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2019-10-15 01:55:04,812 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7251 conjuctions. This might take some time... [2019-10-15 01:55:06,013 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:06,071 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 19 [2019-10-15 01:55:06,529 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 20880 conjuctions. This might take some time...