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/Problem03_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:55,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:43:55,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:43:55,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:43:55,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:55,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:55,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:55,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:55,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:55,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:55,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:55,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:55,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:55,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:55,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:55,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:55,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:55,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:55,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:55,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:55,978 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 01:43:55,994 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:55,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:55,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:55,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:55,996 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:55,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:55,997 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:55,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:55,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:55,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:55,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:55,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:55,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:55,998 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:55,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:55,999 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:55,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:56,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:56,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:56,000 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:56,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:56,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:56,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:56,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:56,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:56,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:56,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:56,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:56,002 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 01:43:56,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:56,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:56,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:56,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:56,292 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:56,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-15 01:43:56,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252779e80/c0d0b7f9c4a641c39c545c1f163c7941/FLAG46d2908b3 [2019-10-15 01:43:57,001 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:57,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-15 01:43:57,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252779e80/c0d0b7f9c4a641c39c545c1f163c7941/FLAG46d2908b3 [2019-10-15 01:43:57,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/252779e80/c0d0b7f9c4a641c39c545c1f163c7941 [2019-10-15 01:43:57,184 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:57,186 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:57,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:57,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:57,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:57,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:57" (1/1) ... [2019-10-15 01:43:57,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2e6592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:57, skipping insertion in model container [2019-10-15 01:43:57,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:57" (1/1) ... [2019-10-15 01:43:57,202 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:57,289 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:58,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:58,158 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:58,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:58,569 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:58,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58 WrapperNode [2019-10-15 01:43:58,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:58,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:58,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:58,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:58,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:58,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:58,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:58,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:58,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (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 01:43:58,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:58,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:58,786 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:58,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:58,786 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:58,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:58,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:44:01,821 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:44:01,822 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:44:01,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:44:01 BoogieIcfgContainer [2019-10-15 01:44:01,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:44:01,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:44:01,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:44:01,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:44:01,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:57" (1/3) ... [2019-10-15 01:44:01,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178fd018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:44:01, skipping insertion in model container [2019-10-15 01:44:01,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (2/3) ... [2019-10-15 01:44:01,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178fd018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:44:01, skipping insertion in model container [2019-10-15 01:44:01,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:44:01" (3/3) ... [2019-10-15 01:44:01,842 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2019-10-15 01:44:01,853 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:44:01,864 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:44:01,877 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:44:01,916 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:44:01,916 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:44:01,916 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:44:01,917 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:44:01,917 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:44:01,918 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:44:01,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:44:01,918 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:44:01,954 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:44:01,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:44:01,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:01,979 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:01,982 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:01,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:01,989 INFO L82 PathProgramCache]: Analyzing trace with hash 136464678, now seen corresponding path program 1 times [2019-10-15 01:44:01,998 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:01,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263442784] [2019-10-15 01:44:01,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:01,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:02,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:02,712 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 01:44:02,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263442784] [2019-10-15 01:44:02,714 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:02,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:02,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620016909] [2019-10-15 01:44:02,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:02,720 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:02,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:02,736 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:44:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:03,741 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:44:03,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:03,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:44:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:03,769 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:44:03,769 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:44:03,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:44:03,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:44:03,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:44:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 569 transitions. [2019-10-15 01:44:03,864 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 569 transitions. Word has length 149 [2019-10-15 01:44:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:03,865 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 569 transitions. [2019-10-15 01:44:03,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 569 transitions. [2019-10-15 01:44:03,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-15 01:44:03,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:03,871 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:03,871 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:03,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:03,871 INFO L82 PathProgramCache]: Analyzing trace with hash 111442247, now seen corresponding path program 1 times [2019-10-15 01:44:03,872 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:03,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030439434] [2019-10-15 01:44:03,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:03,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:03,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:04,105 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 01:44:04,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030439434] [2019-10-15 01:44:04,107 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:04,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:44:04,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000726849] [2019-10-15 01:44:04,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:04,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:04,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:44:04,112 INFO L87 Difference]: Start difference. First operand 301 states and 569 transitions. Second operand 5 states. [2019-10-15 01:44:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:05,525 INFO L93 Difference]: Finished difference Result 917 states and 1763 transitions. [2019-10-15 01:44:05,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:05,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-10-15 01:44:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:05,531 INFO L225 Difference]: With dead ends: 917 [2019-10-15 01:44:05,532 INFO L226 Difference]: Without dead ends: 621 [2019-10-15 01:44:05,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:44:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2019-10-15 01:44:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 603. [2019-10-15 01:44:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:44:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1088 transitions. [2019-10-15 01:44:05,592 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1088 transitions. Word has length 157 [2019-10-15 01:44:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:05,593 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1088 transitions. [2019-10-15 01:44:05,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1088 transitions. [2019-10-15 01:44:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:44:05,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:05,599 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 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 01:44:05,599 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:05,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:05,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1532437230, now seen corresponding path program 1 times [2019-10-15 01:44:05,600 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:05,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138749538] [2019-10-15 01:44:05,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:05,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138749538] [2019-10-15 01:44:05,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219870751] [2019-10-15 01:44:05,847 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 01:44:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:06,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:44:06,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:06,248 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:06,480 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:44:06,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-15 01:44:06,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844131112] [2019-10-15 01:44:06,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:06,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:44:06,483 INFO L87 Difference]: Start difference. First operand 603 states and 1088 transitions. Second operand 3 states. [2019-10-15 01:44:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:07,450 INFO L93 Difference]: Finished difference Result 1797 states and 3308 transitions. [2019-10-15 01:44:07,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:07,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:44:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:07,460 INFO L225 Difference]: With dead ends: 1797 [2019-10-15 01:44:07,460 INFO L226 Difference]: Without dead ends: 1199 [2019-10-15 01:44:07,463 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:44:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2019-10-15 01:44:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2019-10-15 01:44:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2019-10-15 01:44:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1885 transitions. [2019-10-15 01:44:07,542 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1885 transitions. Word has length 161 [2019-10-15 01:44:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:07,544 INFO L462 AbstractCegarLoop]: Abstraction has 1199 states and 1885 transitions. [2019-10-15 01:44:07,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1885 transitions. [2019-10-15 01:44:07,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-15 01:44:07,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:07,554 INFO L380 BasicCegarLoop]: trace histogram [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, 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 01:44:07,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:07,760 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:07,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash -660053814, now seen corresponding path program 1 times [2019-10-15 01:44:07,761 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:07,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668642697] [2019-10-15 01:44:07,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,762 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:07,920 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:07,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668642697] [2019-10-15 01:44:07,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:07,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-15 01:44:07,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033787738] [2019-10-15 01:44:07,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:44:07,922 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:07,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:44:07,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:44:07,923 INFO L87 Difference]: Start difference. First operand 1199 states and 1885 transitions. Second operand 7 states. [2019-10-15 01:44:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:09,400 INFO L93 Difference]: Finished difference Result 3779 states and 6973 transitions. [2019-10-15 01:44:09,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:44:09,401 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2019-10-15 01:44:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:09,426 INFO L225 Difference]: With dead ends: 3779 [2019-10-15 01:44:09,427 INFO L226 Difference]: Without dead ends: 2585 [2019-10-15 01:44:09,431 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:44:09,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2019-10-15 01:44:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 2445. [2019-10-15 01:44:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2445 states. [2019-10-15 01:44:09,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2445 states to 2445 states and 3963 transitions. [2019-10-15 01:44:09,568 INFO L78 Accepts]: Start accepts. Automaton has 2445 states and 3963 transitions. Word has length 165 [2019-10-15 01:44:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:09,569 INFO L462 AbstractCegarLoop]: Abstraction has 2445 states and 3963 transitions. [2019-10-15 01:44:09,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:44:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2445 states and 3963 transitions. [2019-10-15 01:44:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:44:09,576 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:09,577 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:09,577 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:09,578 INFO L82 PathProgramCache]: Analyzing trace with hash 568602441, now seen corresponding path program 1 times [2019-10-15 01:44:09,578 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:09,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129322710] [2019-10-15 01:44:09,578 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:09,578 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:09,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:09,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129322710] [2019-10-15 01:44:09,698 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:09,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:44:09,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461525218] [2019-10-15 01:44:09,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:44:09,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:44:09,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:44:09,700 INFO L87 Difference]: Start difference. First operand 2445 states and 3963 transitions. Second operand 6 states. [2019-10-15 01:44:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:11,125 INFO L93 Difference]: Finished difference Result 7385 states and 12817 transitions. [2019-10-15 01:44:11,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:11,126 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2019-10-15 01:44:11,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:11,171 INFO L225 Difference]: With dead ends: 7385 [2019-10-15 01:44:11,171 INFO L226 Difference]: Without dead ends: 4945 [2019-10-15 01:44:11,183 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:44:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4945 states. [2019-10-15 01:44:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4945 to 4859. [2019-10-15 01:44:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4859 states. [2019-10-15 01:44:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4859 states to 4859 states and 7646 transitions. [2019-10-15 01:44:11,379 INFO L78 Accepts]: Start accepts. Automaton has 4859 states and 7646 transitions. Word has length 171 [2019-10-15 01:44:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:11,380 INFO L462 AbstractCegarLoop]: Abstraction has 4859 states and 7646 transitions. [2019-10-15 01:44:11,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4859 states and 7646 transitions. [2019-10-15 01:44:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:44:11,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:11,395 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:11,395 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash -693908939, now seen corresponding path program 1 times [2019-10-15 01:44:11,396 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:11,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101672736] [2019-10-15 01:44:11,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:11,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:11,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:11,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:11,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101672736] [2019-10-15 01:44:11,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110595455] [2019-10-15 01:44:11,528 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 01:44:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:11,788 INFO L256 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:44:11,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:44:11,850 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:11,926 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:11,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:11,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:44:11,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065189014] [2019-10-15 01:44:11,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:11,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:11,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:11,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:44:11,929 INFO L87 Difference]: Start difference. First operand 4859 states and 7646 transitions. Second operand 5 states. [2019-10-15 01:44:13,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:13,323 INFO L93 Difference]: Finished difference Result 14024 states and 23694 transitions. [2019-10-15 01:44:13,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:13,323 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-10-15 01:44:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:13,393 INFO L225 Difference]: With dead ends: 14024 [2019-10-15 01:44:13,393 INFO L226 Difference]: Without dead ends: 9170 [2019-10-15 01:44:13,411 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:44:13,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2019-10-15 01:44:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 9028. [2019-10-15 01:44:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9028 states. [2019-10-15 01:44:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9028 states to 9028 states and 14422 transitions. [2019-10-15 01:44:13,942 INFO L78 Accepts]: Start accepts. Automaton has 9028 states and 14422 transitions. Word has length 183 [2019-10-15 01:44:13,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:13,943 INFO L462 AbstractCegarLoop]: Abstraction has 9028 states and 14422 transitions. [2019-10-15 01:44:13,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 9028 states and 14422 transitions. [2019-10-15 01:44:13,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-15 01:44:13,978 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:13,978 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:14,183 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:14,184 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -865907640, now seen corresponding path program 1 times [2019-10-15 01:44:14,187 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:14,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345162104] [2019-10-15 01:44:14,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:14,188 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:14,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:14,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345162104] [2019-10-15 01:44:14,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518038275] [2019-10-15 01:44:14,372 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 01:44:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:14,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:44:14,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:14,713 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:14,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1887301045] [2019-10-15 01:44:14,861 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:44:14,861 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:44:14,868 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:44:14,877 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:44:14,878 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:44:15,389 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:44:15,770 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-15 01:44:16,089 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:44:16,436 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:44:16,719 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:44:16,939 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 234 [2019-10-15 01:44:18,021 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-10-15 01:44:18,365 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2019-10-15 01:44:20,087 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 248 [2019-10-15 01:44:20,797 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:44:20,902 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:44:21,252 WARN L191 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-10-15 01:44:21,445 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:21,611 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:21,839 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:44:21,953 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-10-15 01:44:23,598 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-10-15 01:44:23,777 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:23,937 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:44:24,484 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 248 [2019-10-15 01:44:25,073 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 369 [2019-10-15 01:44:25,498 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 374 [2019-10-15 01:44:26,063 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 251 [2019-10-15 01:44:27,267 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 251 [2019-10-15 01:44:27,743 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 170 for LOIs