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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:37,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:37,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:37,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:37,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:37,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:37,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:37,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:37,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:37,559 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:37,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:37,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:37,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:37,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:37,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:37,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:37,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:37,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:37,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:37,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:37,593 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 01:54:37,613 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:37,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:37,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:37,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:37,616 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:37,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:37,616 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:37,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:37,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:37,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:37,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:37,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:37,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:37,619 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:37,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:37,619 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:37,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:37,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:37,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:37,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:37,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:37,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:37,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:37,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:37,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:37,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:37,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:37,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:37,622 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 01:54:37,898 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:37,918 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:37,922 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:37,923 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:37,924 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:37,925 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-10-15 01:54:38,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670b47177/9080ae26b60a4d1780aed398faafd929/FLAG33c34c37e [2019-10-15 01:54:38,711 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:38,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-10-15 01:54:38,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670b47177/9080ae26b60a4d1780aed398faafd929/FLAG33c34c37e [2019-10-15 01:54:38,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670b47177/9080ae26b60a4d1780aed398faafd929 [2019-10-15 01:54:38,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:38,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:38,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:38,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:38,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:38,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5f6572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:38, skipping insertion in model container [2019-10-15 01:54:38,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:38" (1/1) ... [2019-10-15 01:54:38,904 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:38,990 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:39,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:39,802 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:40,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:40,233 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:40,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40 WrapperNode [2019-10-15 01:54:40,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:40,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:40,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:40,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:40,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (1/1) ... [2019-10-15 01:54:40,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:40,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:40,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:40,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:40,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (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 01:54:40,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:40,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:40,541 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:40,542 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:40,542 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:40,542 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:40,543 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:40,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:48,141 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:48,144 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:48,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:48 BoogieIcfgContainer [2019-10-15 01:54:48,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:48,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:48,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:48,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:48,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:38" (1/3) ... [2019-10-15 01:54:48,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94d5218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:48, skipping insertion in model container [2019-10-15 01:54:48,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:40" (2/3) ... [2019-10-15 01:54:48,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94d5218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:48, skipping insertion in model container [2019-10-15 01:54:48,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:48" (3/3) ... [2019-10-15 01:54:48,159 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label34.c [2019-10-15 01:54:48,169 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:48,178 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:48,189 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:48,230 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:48,231 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:48,231 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:48,231 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:48,232 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:48,232 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:48,232 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:48,232 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:48,264 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:48,265 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:48,267 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash 648042605, now seen corresponding path program 1 times [2019-10-15 01:54:48,282 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:48,282 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668484731] [2019-10-15 01:54:48,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:48,282 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:48,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:48,492 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 01:54:48,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668484731] [2019-10-15 01:54:48,495 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:48,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:48,496 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894977377] [2019-10-15 01:54:48,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:48,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:48,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:48,518 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:57,160 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:57,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:57,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:57,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:57,223 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:57,223 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:57,236 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 01:54:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 679. [2019-10-15 01:54:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-15 01:54:57,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1210 transitions. [2019-10-15 01:54:57,333 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1210 transitions. Word has length 11 [2019-10-15 01:54:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:57,334 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1210 transitions. [2019-10-15 01:54:57,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1210 transitions. [2019-10-15 01:54:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:54:57,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:57,337 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] [2019-10-15 01:54:57,338 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:57,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:57,338 INFO L82 PathProgramCache]: Analyzing trace with hash 958749736, now seen corresponding path program 1 times [2019-10-15 01:54:57,338 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:57,339 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019016243] [2019-10-15 01:54:57,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,339 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:57,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:57,492 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 01:54:57,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019016243] [2019-10-15 01:54:57,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:57,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:54:57,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589718897] [2019-10-15 01:54:57,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:54:57,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:54:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:54:57,496 INFO L87 Difference]: Start difference. First operand 679 states and 1210 transitions. Second operand 5 states. [2019-10-15 01:55:01,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:01,450 INFO L93 Difference]: Finished difference Result 2059 states and 3710 transitions. [2019-10-15 01:55:01,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:01,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-15 01:55:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:01,462 INFO L225 Difference]: With dead ends: 2059 [2019-10-15 01:55:01,462 INFO L226 Difference]: Without dead ends: 1385 [2019-10-15 01:55:01,465 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 01:55:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-10-15 01:55:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1340. [2019-10-15 01:55:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2019-10-15 01:55:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2018 transitions. [2019-10-15 01:55:01,544 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2018 transitions. Word has length 24 [2019-10-15 01:55:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:01,544 INFO L462 AbstractCegarLoop]: Abstraction has 1340 states and 2018 transitions. [2019-10-15 01:55:01,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2018 transitions. [2019-10-15 01:55:01,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:55:01,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:01,546 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] [2019-10-15 01:55:01,546 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1428301592, now seen corresponding path program 1 times [2019-10-15 01:55:01,547 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:01,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307666275] [2019-10-15 01:55:01,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:01,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:01,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:01,688 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 01:55:01,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307666275] [2019-10-15 01:55:01,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:01,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:01,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890177728] [2019-10-15 01:55:01,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:01,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:01,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:01,691 INFO L87 Difference]: Start difference. First operand 1340 states and 2018 transitions. Second operand 4 states. [2019-10-15 01:55:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:08,379 INFO L93 Difference]: Finished difference Result 5319 states and 8187 transitions. [2019-10-15 01:55:08,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:08,383 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 01:55:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:08,403 INFO L225 Difference]: With dead ends: 5319 [2019-10-15 01:55:08,413 INFO L226 Difference]: Without dead ends: 3984 [2019-10-15 01:55:08,418 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 01:55:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2019-10-15 01:55:08,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 2857. [2019-10-15 01:55:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2857 states. [2019-10-15 01:55:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2857 states to 2857 states and 4264 transitions. [2019-10-15 01:55:08,517 INFO L78 Accepts]: Start accepts. Automaton has 2857 states and 4264 transitions. Word has length 32 [2019-10-15 01:55:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:08,517 INFO L462 AbstractCegarLoop]: Abstraction has 2857 states and 4264 transitions. [2019-10-15 01:55:08,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2857 states and 4264 transitions. [2019-10-15 01:55:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:55:08,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:08,521 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:08,521 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1146619043, now seen corresponding path program 1 times [2019-10-15 01:55:08,522 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:08,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567911465] [2019-10-15 01:55:08,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:08,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:08,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:08,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567911465] [2019-10-15 01:55:08,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630293791] [2019-10-15 01:55:08,708 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 01:55:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:08,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:08,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:08,911 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:08,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1166919140] [2019-10-15 01:55:09,041 INFO L162 IcfgInterpreter]: Started Sifa with 28 locations of interest [2019-10-15 01:55:09,041 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:09,048 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:09,061 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:09,062 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:09,274 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:09,426 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-15 01:55:09,446 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2019-10-15 01:55:09,483 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2019-10-15 01:55:10,125 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8324 conjuctions. This might take some time... [2019-10-15 01:55:10,249 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54 [2019-10-15 01:55:10,607 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 8324 conjuctions. This might take some time... [2019-10-15 01:55:12,860 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:12,897 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:55:13,436 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:55:13,871 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:55:14,377 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 57 [2019-10-15 01:55:14,421 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:55:14,873 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 57