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_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:46,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:43:46,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:43:46,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:43:46,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:46,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:46,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:46,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:46,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:46,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:46,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:46,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:46,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:46,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:46,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:46,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:46,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:46,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:46,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:46,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:46,878 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 01:43:46,902 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:46,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:46,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:46,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:46,904 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:46,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:46,904 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:46,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:46,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:46,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:46,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:46,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:46,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:46,905 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:46,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:46,906 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:46,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:46,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:46,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:46,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:46,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:46,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:46,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:46,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:46,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:46,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:46,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:46,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:46,909 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 01:43:47,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:47,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:47,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:47,207 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:47,208 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:47,208 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label30.c [2019-10-15 01:43:47,284 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e55422b1a/7bae3232ee144b7584bade6dfc3604a7/FLAG2bc16cd22 [2019-10-15 01:43:47,944 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:47,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label30.c [2019-10-15 01:43:47,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e55422b1a/7bae3232ee144b7584bade6dfc3604a7/FLAG2bc16cd22 [2019-10-15 01:43:48,140 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e55422b1a/7bae3232ee144b7584bade6dfc3604a7 [2019-10-15 01:43:48,151 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:48,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:48,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:48,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:48,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:48,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:48" (1/1) ... [2019-10-15 01:43:48,165 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f8ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:48, skipping insertion in model container [2019-10-15 01:43:48,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:48" (1/1) ... [2019-10-15 01:43:48,174 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:48,250 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:49,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:49,076 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:49,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:49,373 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:49,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49 WrapperNode [2019-10-15 01:43:49,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:49,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:49,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:49,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:49,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (1/1) ... [2019-10-15 01:43:49,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:49,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:49,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:49,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:49,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (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 01:43:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:49,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:49,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:49,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:49,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:52,653 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:52,654 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:52,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:52 BoogieIcfgContainer [2019-10-15 01:43:52,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:52,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:52,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:52,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:52,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:48" (1/3) ... [2019-10-15 01:43:52,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48050828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:52, skipping insertion in model container [2019-10-15 01:43:52,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:49" (2/3) ... [2019-10-15 01:43:52,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48050828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:52, skipping insertion in model container [2019-10-15 01:43:52,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:52" (3/3) ... [2019-10-15 01:43:52,665 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label30.c [2019-10-15 01:43:52,675 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:52,685 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:52,698 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:52,726 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:52,727 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:52,727 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:52,727 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:52,727 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:52,727 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:52,727 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:52,728 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:43:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:43:52,766 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:52,767 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 01:43:52,770 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash 136471846, now seen corresponding path program 1 times [2019-10-15 01:43:52,789 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:52,789 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198797669] [2019-10-15 01:43:52,789 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:52,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:52,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:53,685 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 01:43:53,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198797669] [2019-10-15 01:43:53,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:53,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:53,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682227815] [2019-10-15 01:43:53,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:53,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:53,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:53,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:53,717 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:43:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:54,902 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:43:54,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:54,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:43:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:54,921 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:43:54,922 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:43:54,926 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 01:43:54,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:43:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:43:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:43:55,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-10-15 01:43:55,005 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-10-15 01:43:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:55,006 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-10-15 01:43:55,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-10-15 01:43:55,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:43:55,012 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:55,012 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-15 01:43:55,012 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:55,013 INFO L82 PathProgramCache]: Analyzing trace with hash 558841789, now seen corresponding path program 1 times [2019-10-15 01:43:55,013 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:55,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895371754] [2019-10-15 01:43:55,014 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:55,014 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:55,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:55,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895371754] [2019-10-15 01:43:55,207 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:55,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:55,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035716832] [2019-10-15 01:43:55,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:55,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:55,212 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-10-15 01:43:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:56,774 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-10-15 01:43:56,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:56,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-10-15 01:43:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:56,788 INFO L225 Difference]: With dead ends: 929 [2019-10-15 01:43:56,788 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:43:56,793 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 01:43:56,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:43:56,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-10-15 01:43:56,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:43:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-10-15 01:43:56,889 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-10-15 01:43:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:56,890 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-10-15 01:43:56,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-10-15 01:43:56,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:43:56,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:56,904 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 01:43:56,905 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:56,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:56,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1532430062, now seen corresponding path program 1 times [2019-10-15 01:43:56,905 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:56,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099682419] [2019-10-15 01:43:56,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:56,906 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:56,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:57,178 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 01:43:57,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099682419] [2019-10-15 01:43:57,179 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:57,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:57,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117549111] [2019-10-15 01:43:57,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:57,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:57,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:57,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:57,181 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-10-15 01:43:58,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:58,240 INFO L93 Difference]: Finished difference Result 1793 states and 3375 transitions. [2019-10-15 01:43:58,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:58,240 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:43:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:58,249 INFO L225 Difference]: With dead ends: 1793 [2019-10-15 01:43:58,250 INFO L226 Difference]: Without dead ends: 1195 [2019-10-15 01:43:58,253 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 01:43:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-10-15 01:43:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-10-15 01:43:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-10-15 01:43:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2084 transitions. [2019-10-15 01:43:58,311 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2084 transitions. Word has length 161 [2019-10-15 01:43:58,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:58,312 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2084 transitions. [2019-10-15 01:43:58,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2084 transitions. [2019-10-15 01:43:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-15 01:43:58,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:58,318 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:58,319 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:58,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash -627082077, now seen corresponding path program 1 times [2019-10-15 01:43:58,320 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:58,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248524754] [2019-10-15 01:43:58,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:58,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:58,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:58,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:58,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248524754] [2019-10-15 01:43:58,556 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:58,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:58,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902989378] [2019-10-15 01:43:58,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:58,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:58,558 INFO L87 Difference]: Start difference. First operand 1195 states and 2084 transitions. Second operand 3 states. [2019-10-15 01:43:59,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:59,555 INFO L93 Difference]: Finished difference Result 3569 states and 6416 transitions. [2019-10-15 01:43:59,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:59,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-15 01:43:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:59,580 INFO L225 Difference]: With dead ends: 3569 [2019-10-15 01:43:59,580 INFO L226 Difference]: Without dead ends: 2379 [2019-10-15 01:43:59,586 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 01:43:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2019-10-15 01:43:59,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2379. [2019-10-15 01:43:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2379 states. [2019-10-15 01:43:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 4177 transitions. [2019-10-15 01:43:59,697 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 4177 transitions. Word has length 181 [2019-10-15 01:43:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:59,697 INFO L462 AbstractCegarLoop]: Abstraction has 2379 states and 4177 transitions. [2019-10-15 01:43:59,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 4177 transitions. [2019-10-15 01:43:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-15 01:43:59,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:59,710 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 01:43:59,710 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:59,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash 938383816, now seen corresponding path program 1 times [2019-10-15 01:43:59,711 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:59,711 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182038646] [2019-10-15 01:43:59,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:59,711 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:59,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:59,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182038646] [2019-10-15 01:43:59,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:59,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:59,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924630303] [2019-10-15 01:43:59,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:59,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:59,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:59,928 INFO L87 Difference]: Start difference. First operand 2379 states and 4177 transitions. Second operand 6 states. [2019-10-15 01:44:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:01,255 INFO L93 Difference]: Finished difference Result 6011 states and 11153 transitions. [2019-10-15 01:44:01,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:01,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 207 [2019-10-15 01:44:01,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:01,287 INFO L225 Difference]: With dead ends: 6011 [2019-10-15 01:44:01,287 INFO L226 Difference]: Without dead ends: 3637 [2019-10-15 01:44:01,293 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 01:44:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3637 states. [2019-10-15 01:44:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3637 to 3607. [2019-10-15 01:44:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3607 states. [2019-10-15 01:44:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 6391 transitions. [2019-10-15 01:44:01,436 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 6391 transitions. Word has length 207 [2019-10-15 01:44:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:01,436 INFO L462 AbstractCegarLoop]: Abstraction has 3607 states and 6391 transitions. [2019-10-15 01:44:01,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 6391 transitions. [2019-10-15 01:44:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-15 01:44:01,449 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:01,450 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:01,450 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash -853528908, now seen corresponding path program 1 times [2019-10-15 01:44:01,451 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:01,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702704055] [2019-10-15 01:44:01,451 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:01,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:01,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:01,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702704055] [2019-10-15 01:44:01,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825805599] [2019-10-15 01:44:01,774 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 01:44:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:02,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:44:02,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 01:44:02,338 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 64 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:02,449 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:02,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:44:02,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456699190] [2019-10-15 01:44:02,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:02,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:02,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:02,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:44:02,451 INFO L87 Difference]: Start difference. First operand 3607 states and 6391 transitions. Second operand 5 states. [2019-10-15 01:44:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:03,753 INFO L93 Difference]: Finished difference Result 9793 states and 18332 transitions. [2019-10-15 01:44:03,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:03,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 219 [2019-10-15 01:44:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:03,803 INFO L225 Difference]: With dead ends: 9793 [2019-10-15 01:44:03,803 INFO L226 Difference]: Without dead ends: 6191 [2019-10-15 01:44:03,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:44:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6191 states. [2019-10-15 01:44:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6191 to 6121. [2019-10-15 01:44:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6121 states. [2019-10-15 01:44:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6121 states to 6121 states and 10956 transitions. [2019-10-15 01:44:04,138 INFO L78 Accepts]: Start accepts. Automaton has 6121 states and 10956 transitions. Word has length 219 [2019-10-15 01:44:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:04,139 INFO L462 AbstractCegarLoop]: Abstraction has 6121 states and 10956 transitions. [2019-10-15 01:44:04,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 6121 states and 10956 transitions. [2019-10-15 01:44:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-15 01:44:04,269 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:04,269 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:44:04,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:04,477 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1798011981, now seen corresponding path program 1 times [2019-10-15 01:44:04,478 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:04,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685747363] [2019-10-15 01:44:04,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:04,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:04,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 102 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:04,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685747363] [2019-10-15 01:44:04,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298618134] [2019-10-15 01:44:04,730 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 01:44:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:04,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:44:04,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-15 01:44:05,166 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 102 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:05,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:05,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:44:05,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710429573] [2019-10-15 01:44:05,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:05,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:44:05,357 INFO L87 Difference]: Start difference. First operand 6121 states and 10956 transitions. Second operand 5 states. [2019-10-15 01:44:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:06,760 INFO L93 Difference]: Finished difference Result 16347 states and 30478 transitions. [2019-10-15 01:44:06,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:44:06,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 257 [2019-10-15 01:44:06,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:06,828 INFO L225 Difference]: With dead ends: 16347 [2019-10-15 01:44:06,828 INFO L226 Difference]: Without dead ends: 10231 [2019-10-15 01:44:06,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 509 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:44:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10231 states. [2019-10-15 01:44:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10231 to 10139. [2019-10-15 01:44:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10139 states. [2019-10-15 01:44:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10139 states to 10139 states and 17607 transitions. [2019-10-15 01:44:07,211 INFO L78 Accepts]: Start accepts. Automaton has 10139 states and 17607 transitions. Word has length 257 [2019-10-15 01:44:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:07,212 INFO L462 AbstractCegarLoop]: Abstraction has 10139 states and 17607 transitions. [2019-10-15 01:44:07,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10139 states and 17607 transitions. [2019-10-15 01:44:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-10-15 01:44:07,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:07,267 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:07,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:07,474 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:07,474 INFO L82 PathProgramCache]: Analyzing trace with hash 691493853, now seen corresponding path program 1 times [2019-10-15 01:44:07,475 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:07,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767966392] [2019-10-15 01:44:07,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:07,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:07,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767966392] [2019-10-15 01:44:07,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706935959] [2019-10-15 01:44:07,822 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 01:44:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:08,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:44:08,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:08,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:08,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2030498622] [2019-10-15 01:44:08,472 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:44:08,473 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:44:08,482 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:44:08,494 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:44:08,495 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:44:08,892 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:44:09,600 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 208 for LOIs [2019-10-15 01:44:09,893 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:44:10,146 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:44:10,410 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:44:13,165 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-10-15 01:44:13,813 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:13,934 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:14,169 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 363 [2019-10-15 01:44:14,310 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:14,422 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:14,637 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:44:14,759 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-10-15 01:44:15,035 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2019-10-15 01:44:15,888 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:16,127 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-10-15 01:44:16,288 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:44:16,394 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:16,634 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:44:16,754 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2019-10-15 01:44:17,546 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 364 [2019-10-15 01:44:17,651 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:17,802 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-10-15 01:44:18,207 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 368