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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:33,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:33,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:33,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:33,596 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:33,597 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:33,598 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:33,599 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 01:54:33,635 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:33,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:33,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:33,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:33,639 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:33,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:33,639 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:33,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:33,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:33,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:33,640 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:33,640 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:33,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:33,641 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:33,641 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:33,641 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:33,642 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:33,642 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:33,642 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:33,642 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:33,643 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:33,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:33,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:33,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:33,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:33,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:33,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:33,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:33,646 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 01:54:33,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:33,932 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:33,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:33,939 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:33,939 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:33,940 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-10-15 01:54:34,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd779796/0bdd6504f09041acb581c62effaab382/FLAGf0eb837e6 [2019-10-15 01:54:34,711 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:34,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label23.c [2019-10-15 01:54:34,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd779796/0bdd6504f09041acb581c62effaab382/FLAGf0eb837e6 [2019-10-15 01:54:34,874 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dd779796/0bdd6504f09041acb581c62effaab382 [2019-10-15 01:54:34,885 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:34,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:34,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:34,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:34,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:34,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:34" (1/1) ... [2019-10-15 01:54:34,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d4d663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:34, skipping insertion in model container [2019-10-15 01:54:34,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:34" (1/1) ... [2019-10-15 01:54:34,909 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:34,996 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:35,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:35,860 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:36,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:36,136 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:36,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36 WrapperNode [2019-10-15 01:54:36,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:36,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:36,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:36,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:36,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,207 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (1/1) ... [2019-10-15 01:54:36,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:36,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:36,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:36,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:36,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (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 01:54:36,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:36,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:36,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:36,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:36,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:36,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:36,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:36,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:36,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:36,430 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:36,430 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:36,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:36,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:51,156 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:51,157 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:51,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:51 BoogieIcfgContainer [2019-10-15 01:54:51,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:51,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:51,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:51,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:51,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:34" (1/3) ... [2019-10-15 01:54:51,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a2b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:51, skipping insertion in model container [2019-10-15 01:54:51,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:36" (2/3) ... [2019-10-15 01:54:51,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a2b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:51, skipping insertion in model container [2019-10-15 01:54:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:51" (3/3) ... [2019-10-15 01:54:51,169 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label23.c [2019-10-15 01:54:51,179 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:51,187 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:51,198 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:51,225 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:51,225 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:51,225 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:51,225 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:51,225 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:51,226 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:51,226 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:51,226 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:51,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:51,258 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:51,260 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash 648043629, now seen corresponding path program 1 times [2019-10-15 01:54:51,273 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:51,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498505382] [2019-10-15 01:54:51,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:51,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:51,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:51,472 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 01:54:51,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498505382] [2019-10-15 01:54:51,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:51,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:51,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090990458] [2019-10-15 01:54:51,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:51,479 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:51,496 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:56,932 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:56,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:56,934 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:56,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:56,974 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:56,974 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:56,990 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 01:54:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 430. [2019-10-15 01:54:57,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2019-10-15 01:54:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 821 transitions. [2019-10-15 01:54:57,136 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 821 transitions. Word has length 11 [2019-10-15 01:54:57,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:57,137 INFO L462 AbstractCegarLoop]: Abstraction has 430 states and 821 transitions. [2019-10-15 01:54:57,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:57,137 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 821 transitions. [2019-10-15 01:54:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:54:57,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:57,140 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 01:54:57,141 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:57,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1393104440, now seen corresponding path program 1 times [2019-10-15 01:54:57,142 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:57,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119683104] [2019-10-15 01:54:57,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,143 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:57,298 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 01:54:57,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119683104] [2019-10-15 01:54:57,298 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:57,299 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:54:57,299 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33581182] [2019-10-15 01:54:57,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:54:57,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:57,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:54:57,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:54:57,302 INFO L87 Difference]: Start difference. First operand 430 states and 821 transitions. Second operand 3 states. [2019-10-15 01:54:59,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:59,086 INFO L93 Difference]: Finished difference Result 1278 states and 2464 transitions. [2019-10-15 01:54:59,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:54:59,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-10-15 01:54:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:59,095 INFO L225 Difference]: With dead ends: 1278 [2019-10-15 01:54:59,095 INFO L226 Difference]: Without dead ends: 853 [2019-10-15 01:54:59,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 01:54:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2019-10-15 01:54:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 830. [2019-10-15 01:54:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 830 states. [2019-10-15 01:54:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1325 transitions. [2019-10-15 01:54:59,139 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1325 transitions. Word has length 21 [2019-10-15 01:54:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:59,140 INFO L462 AbstractCegarLoop]: Abstraction has 830 states and 1325 transitions. [2019-10-15 01:54:59,144 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:54:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1325 transitions. [2019-10-15 01:54:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 01:54:59,146 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:59,147 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] [2019-10-15 01:54:59,149 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:59,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1300577478, now seen corresponding path program 1 times [2019-10-15 01:54:59,150 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:59,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148392429] [2019-10-15 01:54:59,150 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:59,151 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:59,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:59,323 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 01:54:59,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148392429] [2019-10-15 01:54:59,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:59,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:54:59,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208159561] [2019-10-15 01:54:59,326 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:54:59,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:59,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:54:59,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:54:59,328 INFO L87 Difference]: Start difference. First operand 830 states and 1325 transitions. Second operand 5 states. [2019-10-15 01:55:04,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:04,755 INFO L93 Difference]: Finished difference Result 2524 states and 4093 transitions. [2019-10-15 01:55:04,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:04,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-15 01:55:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:04,770 INFO L225 Difference]: With dead ends: 2524 [2019-10-15 01:55:04,771 INFO L226 Difference]: Without dead ends: 1699 [2019-10-15 01:55:04,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2019-10-15 01:55:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1368. [2019-10-15 01:55:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1368 states. [2019-10-15 01:55:04,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1973 transitions. [2019-10-15 01:55:04,831 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1973 transitions. Word has length 38 [2019-10-15 01:55:04,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:04,832 INFO L462 AbstractCegarLoop]: Abstraction has 1368 states and 1973 transitions. [2019-10-15 01:55:04,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:04,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1973 transitions. [2019-10-15 01:55:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:55:04,838 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:04,838 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 01:55:04,839 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:04,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1820237919, now seen corresponding path program 1 times [2019-10-15 01:55:04,839 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:04,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509777806] [2019-10-15 01:55:04,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:04,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:04,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:05,112 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 01:55:05,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509777806] [2019-10-15 01:55:05,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412211520] [2019-10-15 01:55:05,113 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 01:55:05,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:05,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:05,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:05,351 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 01:55:05,351 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:05,564 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 01:55:05,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016940455] [2019-10-15 01:55:05,618 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:05,619 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:05,627 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:05,638 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:05,639 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:05,862 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:06,083 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:55:06,102 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:55:06,126 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2019-10-15 01:55:06,628 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7090 conjuctions. This might take some time... [2019-10-15 01:55:06,737 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2019-10-15 01:55:07,059 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 7090 conjuctions. This might take some time... [2019-10-15 01:55:08,326 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:08,371 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-15 01:55:09,077 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-15 01:55:09,658 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-15 01:55:10,564 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 57 [2019-10-15 01:55:10,607 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2019-10-15 01:55:11,228 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 57 [2019-10-15 01:55:11,345 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 50