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/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 22:59:05,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 22:59:05,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 22:59:05,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 22:59:05,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 22:59:05,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 22:59:05,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 22:59:05,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 22:59:05,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 22:59:05,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 22:59:05,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 22:59:05,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 22:59:05,767 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 22:59:05,769 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 22:59:05,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 22:59:05,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 22:59:05,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 22:59:05,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 22:59:05,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 22:59:05,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 22:59:05,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 22:59:05,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 22:59:05,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 22:59:05,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 22:59:05,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 22:59:05,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 22:59:05,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 22:59:05,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 22:59:05,800 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 [2019-10-13 22:59:05,814 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 22:59:05,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 22:59:05,815 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 22:59:05,815 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 22:59:05,816 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 22:59:05,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 22:59:05,816 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 22:59:05,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 22:59:05,816 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 22:59:05,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 22:59:05,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 22:59:05,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 22:59:05,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 22:59:05,817 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 22:59:05,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 22:59:05,818 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 22:59:05,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 22:59:05,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 22:59:05,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 22:59:05,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 22:59:05,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 22:59:05,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 22:59:05,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 22:59:05,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 22:59:05,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 22:59:05,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 22:59:05,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 22:59:05,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 22:59:05,820 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 [2019-10-13 22:59:06,117 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 22:59:06,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 22:59:06,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 22:59:06,144 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 22:59:06,144 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 22:59:06,145 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-13 22:59:06,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead9263a5/2150638f50ce4cacb6c0bcfc36d65ac8/FLAG58153bbc6 [2019-10-13 22:59:06,695 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 22:59:06,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-13 22:59:06,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead9263a5/2150638f50ce4cacb6c0bcfc36d65ac8/FLAG58153bbc6 [2019-10-13 22:59:07,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ead9263a5/2150638f50ce4cacb6c0bcfc36d65ac8 [2019-10-13 22:59:07,080 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 22:59:07,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 22:59:07,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 22:59:07,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 22:59:07,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 22:59:07,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2330c988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07, skipping insertion in model container [2019-10-13 22:59:07,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,099 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 22:59:07,123 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 22:59:07,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:59:07,346 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 22:59:07,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 22:59:07,394 INFO L192 MainTranslator]: Completed translation [2019-10-13 22:59:07,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07 WrapperNode [2019-10-13 22:59:07,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 22:59:07,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 22:59:07,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 22:59:07,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 22:59:07,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (1/1) ... [2019-10-13 22:59:07,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 22:59:07,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 22:59:07,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 22:59:07,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 22:59:07,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (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 [2019-10-13 22:59:07,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 22:59:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 22:59:07,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 22:59:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 22:59:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 22:59:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 22:59:07,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 22:59:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 22:59:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 22:59:07,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 22:59:08,009 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 22:59:08,010 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 22:59:08,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:08 BoogieIcfgContainer [2019-10-13 22:59:08,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 22:59:08,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 22:59:08,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 22:59:08,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 22:59:08,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:59:07" (1/3) ... [2019-10-13 22:59:08,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58be19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:08, skipping insertion in model container [2019-10-13 22:59:08,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:59:07" (2/3) ... [2019-10-13 22:59:08,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58be19a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:59:08, skipping insertion in model container [2019-10-13 22:59:08,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:59:08" (3/3) ... [2019-10-13 22:59:08,020 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-10-13 22:59:08,028 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 22:59:08,035 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 22:59:08,046 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 22:59:08,070 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 22:59:08,071 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 22:59:08,071 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 22:59:08,071 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 22:59:08,071 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 22:59:08,071 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 22:59:08,072 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 22:59:08,072 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 22:59:08,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-13 22:59:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 22:59:08,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:08,095 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:08,097 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:08,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1133679609, now seen corresponding path program 1 times [2019-10-13 22:59:08,108 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:08,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655281051] [2019-10-13 22:59:08,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:08,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:08,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:08,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655281051] [2019-10-13 22:59:08,488 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 22:59:08,489 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-13 22:59:08,489 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654186972] [2019-10-13 22:59:08,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 22:59:08,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 22:59:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-13 22:59:08,513 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 12 states. [2019-10-13 22:59:08,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:08,624 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2019-10-13 22:59:08,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 22:59:08,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-10-13 22:59:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:08,636 INFO L225 Difference]: With dead ends: 30 [2019-10-13 22:59:08,637 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 22:59:08,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-13 22:59:08,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 22:59:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 22:59:08,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 22:59:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-13 22:59:08,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-13 22:59:08,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:08,680 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-13 22:59:08,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 22:59:08,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-13 22:59:08,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 22:59:08,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:08,682 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:08,682 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:08,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:08,682 INFO L82 PathProgramCache]: Analyzing trace with hash 786024767, now seen corresponding path program 1 times [2019-10-13 22:59:08,683 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:08,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239572518] [2019-10-13 22:59:08,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:08,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:08,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:08,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239572518] [2019-10-13 22:59:08,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043394159] [2019-10-13 22:59:08,893 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 [2019-10-13 22:59:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:08,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 22:59:08,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:08,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:09,146 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:09,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,273 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,340 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 22:59:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:09,532 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [520584248] [2019-10-13 22:59:09,561 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-13 22:59:09,562 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:09,569 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:09,579 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:09,580 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:09,763 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 10 for LOIs [2019-10-13 22:59:10,179 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-10-13 22:59:10,189 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:10,189 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:10,190 INFO L193 IcfgInterpreter]: Reachable states at location L118 satisfy 78#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (<= main_~main__x~0 8) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (<= 8 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (= 8 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:10,190 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 38#(and (<= main_~main__y~0 50) (<= 0 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= 0 main_~main__x~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 0)) [2019-10-13 22:59:10,190 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 148#(and (= ~__return_main~0 |old(~__return_main~0)|) (= |old(~__return_720~0)| ~__return_720~0)) [2019-10-13 22:59:10,191 INFO L193 IcfgInterpreter]: Reachable states at location L130 satisfy 73#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (<= main_~main__x~0 7) (<= 7 main_~main__x~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (= 7 main_~main__x~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:10,192 INFO L193 IcfgInterpreter]: Reachable states at location L142 satisfy 68#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (<= 6 main_~main__x~0) (= 6 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (<= main_~main__x~0 6) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:10,194 INFO L193 IcfgInterpreter]: Reachable states at location L89 satisfy 134#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= main_~__VERIFIER_assert__cond~0 1) (<= main_~__tmp_1~0 1) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:10,195 INFO L193 IcfgInterpreter]: Reachable states at location L154 satisfy 63#(and (<= main_~main__y~0 50) (<= main_~main__x~0 5) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (= 5 main_~main__x~0) (<= 5 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:10,195 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= ~__return_720~0 0) (<= 0 ~__return_720~0) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:10,195 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0)) [2019-10-13 22:59:10,195 INFO L193 IcfgInterpreter]: Reachable states at location L91 satisfy 139#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= main_~__VERIFIER_assert__cond~0 0) (= main_~__VERIFIER_assert__cond~0 0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__tmp_1~0 0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:10,196 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 153#(and (= ~__return_720~0 0) (<= 0 ~__return_720~0) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:10,196 INFO L193 IcfgInterpreter]: Reachable states at location L166 satisfy 58#(and (<= main_~main__y~0 50) (<= 4 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (<= main_~main__x~0 4) (= |old(~__return_720~0)| ~__return_720~0) (= 4 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:10,196 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:10,196 INFO L193 IcfgInterpreter]: Reachable states at location L178 satisfy 53#(and (<= main_~main__y~0 50) (= 3 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (<= 3 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 3)) [2019-10-13 22:59:10,197 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 144#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= main_~__VERIFIER_assert__cond~0 0) (= main_~__VERIFIER_assert__cond~0 0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__tmp_1~0 0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:10,197 INFO L193 IcfgInterpreter]: Reachable states at location L190 satisfy 48#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= 2 main_~main__x~0) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 2) (= 2 main_~main__x~0)) [2019-10-13 22:59:10,197 INFO L193 IcfgInterpreter]: Reachable states at location L202 satisfy 43#(and (<= main_~main__y~0 50) (= 1 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 1 main_~main__x~0) (<= 0 ~__return_main~0) (<= main_~main__x~0 1) (<= ~__return_main~0 0) (<= |old(~__return_720~0)| 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:10,198 INFO L193 IcfgInterpreter]: Reachable states at location L106 satisfy 129#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0)) [2019-10-13 22:59:10,886 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 22:59:10,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 15] total 39 [2019-10-13 22:59:10,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122460208] [2019-10-13 22:59:10,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 22:59:10,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:10,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 22:59:10,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=986, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 22:59:10,893 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 39 states. [2019-10-13 22:59:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:12,157 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2019-10-13 22:59:12,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 22:59:12,158 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 18 [2019-10-13 22:59:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:12,160 INFO L225 Difference]: With dead ends: 34 [2019-10-13 22:59:12,160 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 22:59:12,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1026, Invalid=3134, Unknown=0, NotChecked=0, Total=4160 [2019-10-13 22:59:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 22:59:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 22:59:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 22:59:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-13 22:59:12,172 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2019-10-13 22:59:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:12,172 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-13 22:59:12,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 22:59:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-13 22:59:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 22:59:12,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:12,174 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:12,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:12,379 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1081226431, now seen corresponding path program 2 times [2019-10-13 22:59:12,380 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:12,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831413581] [2019-10-13 22:59:12,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:12,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:12,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:12,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831413581] [2019-10-13 22:59:12,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702664567] [2019-10-13 22:59:12,829 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-10-13 22:59:12,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 22:59:12,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 22:59:12,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 22:59:12,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:13,226 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:13,226 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:14,213 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:14,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075032775] [2019-10-13 22:59:14,215 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-13 22:59:14,215 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:14,215 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:14,216 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:14,216 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:14,250 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2019-10-13 22:59:14,503 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-10-13 22:59:14,507 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:14,508 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:14,508 INFO L193 IcfgInterpreter]: Reachable states at location L118 satisfy 78#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (<= main_~main__x~0 8) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (<= 8 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (= 8 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:14,508 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 38#(and (<= main_~main__y~0 50) (<= 0 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= 0 main_~main__x~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 0)) [2019-10-13 22:59:14,508 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 150#(and (= ~__return_main~0 |old(~__return_main~0)|) (= |old(~__return_720~0)| ~__return_720~0)) [2019-10-13 22:59:14,509 INFO L193 IcfgInterpreter]: Reachable states at location L130 satisfy 73#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (<= main_~main__x~0 7) (<= 7 main_~main__x~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (= 7 main_~main__x~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:14,509 INFO L193 IcfgInterpreter]: Reachable states at location L142 satisfy 68#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (<= 6 main_~main__x~0) (= 6 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (<= main_~main__x~0 6) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:14,509 INFO L193 IcfgInterpreter]: Reachable states at location L89 satisfy 136#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= main_~__VERIFIER_assert__cond~0 1) (<= main_~__tmp_1~0 1) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:14,509 INFO L193 IcfgInterpreter]: Reachable states at location L154 satisfy 63#(and (<= main_~main__y~0 50) (<= main_~main__x~0 5) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= 5 main_~main__x~0) (<= 5 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:14,510 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= ~__return_720~0 0) (<= 0 ~__return_720~0) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:14,510 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:14,510 INFO L193 IcfgInterpreter]: Reachable states at location L91 satisfy 141#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= main_~__VERIFIER_assert__cond~0 0) (= main_~__VERIFIER_assert__cond~0 0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__tmp_1~0 0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:14,510 INFO L193 IcfgInterpreter]: Reachable states at location L166 satisfy 58#(and (<= main_~main__y~0 50) (<= 4 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (<= main_~main__x~0 4) (= |old(~__return_720~0)| ~__return_720~0) (= 4 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:14,511 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 155#(and (= ~__return_720~0 0) (<= 0 ~__return_720~0) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:14,511 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:14,511 INFO L193 IcfgInterpreter]: Reachable states at location L178 satisfy 53#(and (<= main_~main__y~0 50) (= 3 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (<= 3 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 3)) [2019-10-13 22:59:14,511 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 146#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= main_~__VERIFIER_assert__cond~0 0) (= main_~__VERIFIER_assert__cond~0 0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__tmp_1~0 0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:14,512 INFO L193 IcfgInterpreter]: Reachable states at location L190 satisfy 48#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= 2 main_~main__x~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 2) (= 2 main_~main__x~0)) [2019-10-13 22:59:14,512 INFO L193 IcfgInterpreter]: Reachable states at location L106 satisfy 131#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0)) [2019-10-13 22:59:14,512 INFO L193 IcfgInterpreter]: Reachable states at location L202 satisfy 43#(and (<= main_~main__y~0 50) (= 1 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 1 main_~main__x~0) (<= 0 ~__return_main~0) (<= main_~main__x~0 1) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:15,193 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 22:59:15,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 15] total 63 [2019-10-13 22:59:15,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478563330] [2019-10-13 22:59:15,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-10-13 22:59:15,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:15,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-10-13 22:59:15,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1564, Invalid=2342, Unknown=0, NotChecked=0, Total=3906 [2019-10-13 22:59:15,199 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 63 states. [2019-10-13 22:59:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:18,322 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2019-10-13 22:59:18,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-13 22:59:18,323 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 30 [2019-10-13 22:59:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:18,325 INFO L225 Difference]: With dead ends: 58 [2019-10-13 22:59:18,325 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 22:59:18,329 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3702, Invalid=8954, Unknown=0, NotChecked=0, Total=12656 [2019-10-13 22:59:18,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 22:59:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-10-13 22:59:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 22:59:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-10-13 22:59:18,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 30 [2019-10-13 22:59:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:18,339 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-10-13 22:59:18,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-10-13 22:59:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-10-13 22:59:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 22:59:18,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:18,341 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:18,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:18,545 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash -986494017, now seen corresponding path program 3 times [2019-10-13 22:59:18,546 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:18,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048449263] [2019-10-13 22:59:18,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:18,547 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:18,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:19,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048449263] [2019-10-13 22:59:19,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782887818] [2019-10-13 22:59:19,765 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-10-13 22:59:19,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 22:59:19,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 22:59:19,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-13 22:59:19,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:21,084 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 22:59:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:24,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35356433] [2019-10-13 22:59:24,663 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-13 22:59:24,664 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 22:59:24,664 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 22:59:24,664 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 22:59:24,665 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 22:59:24,687 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2019-10-13 22:59:24,858 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2019-10-13 22:59:24,865 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 22:59:24,865 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 22:59:24,866 INFO L193 IcfgInterpreter]: Reachable states at location L118 satisfy 78#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (<= main_~main__x~0 8) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (<= 8 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (= 8 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:24,866 INFO L193 IcfgInterpreter]: Reachable states at location L12 satisfy 38#(and (<= main_~main__y~0 50) (<= 0 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= 0 main_~main__x~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 0)) [2019-10-13 22:59:24,866 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 150#(and (= ~__return_main~0 |old(~__return_main~0)|) (= |old(~__return_720~0)| ~__return_720~0)) [2019-10-13 22:59:24,867 INFO L193 IcfgInterpreter]: Reachable states at location L130 satisfy 73#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (<= main_~main__x~0 7) (<= 7 main_~main__x~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (= 7 main_~main__x~0) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:24,867 INFO L193 IcfgInterpreter]: Reachable states at location L142 satisfy 68#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (<= 6 main_~main__x~0) (= 6 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (<= main_~main__x~0 6) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:24,867 INFO L193 IcfgInterpreter]: Reachable states at location L89 satisfy 136#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= main_~__VERIFIER_assert__cond~0 1) (<= main_~__tmp_1~0 1) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:24,867 INFO L193 IcfgInterpreter]: Reachable states at location L154 satisfy 63#(and (<= main_~main__y~0 50) (<= main_~main__x~0 5) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= 5 main_~main__x~0) (<= 5 main_~main__x~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:24,868 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= ~__return_720~0 0) (<= 0 ~__return_720~0) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:24,869 INFO L193 IcfgInterpreter]: Reachable states at location L91 satisfy 141#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= main_~__VERIFIER_assert__cond~0 0) (= main_~__VERIFIER_assert__cond~0 0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__tmp_1~0 0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:24,869 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:24,869 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 155#(and (= ~__return_720~0 0) (<= 0 ~__return_720~0) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= ~__return_main~0 0)) [2019-10-13 22:59:24,870 INFO L193 IcfgInterpreter]: Reachable states at location L166 satisfy 58#(and (<= main_~main__y~0 50) (<= 4 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (<= main_~main__x~0 4) (= |old(~__return_720~0)| ~__return_720~0) (= 4 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:24,870 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 22:59:24,874 INFO L193 IcfgInterpreter]: Reachable states at location L178 satisfy 53#(and (<= main_~main__y~0 50) (= 3 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (<= 3 main_~main__x~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 3)) [2019-10-13 22:59:24,874 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 146#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= main_~__VERIFIER_assert__cond~0 0) (= main_~__VERIFIER_assert__cond~0 0) (not (< main_~main__x~0 100)) (= main_~__tmp_1~0 main_~__VERIFIER_assert__cond~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0) (<= 100 main_~main__x~0) (<= 0 main_~__VERIFIER_assert__cond~0) (<= main_~__tmp_1~0 0) (= (ite (= 100 main_~main__y~0) 1 0) main_~__tmp_1~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= 0 main_~__tmp_1~0)) [2019-10-13 22:59:24,875 INFO L193 IcfgInterpreter]: Reachable states at location L190 satisfy 48#(and (<= main_~main__y~0 50) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (<= 2 main_~main__x~0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= main_~main__x~0 2) (= 2 main_~main__x~0)) [2019-10-13 22:59:24,875 INFO L193 IcfgInterpreter]: Reachable states at location L106 satisfy 131#(and (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 0 ~__return_main~0) (= ~__return_main~0 0) (<= ~__return_720~0 0) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (<= 9 main_~main__x~0)) [2019-10-13 22:59:24,875 INFO L193 IcfgInterpreter]: Reachable states at location L202 satisfy 43#(and (<= main_~main__y~0 50) (= 1 main_~main__x~0) (<= 0 ~__return_720~0) (= |old(~__return_720~0)| 0) (<= 50 main_~main__y~0) (<= 0 |old(~__return_720~0)|) (<= 1 main_~main__x~0) (<= 0 ~__return_main~0) (<= main_~main__x~0 1) (<= |old(~__return_720~0)| 0) (<= ~__return_main~0 0) (= 50 main_~main__y~0) (= |old(~__return_720~0)| ~__return_720~0) (= ~__return_main~0 0) (<= ~__return_720~0 0)) [2019-10-13 22:59:25,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 22:59:25,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 15] total 111 [2019-10-13 22:59:25,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573039818] [2019-10-13 22:59:25,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-10-13 22:59:25,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 22:59:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-10-13 22:59:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5428, Invalid=6782, Unknown=0, NotChecked=0, Total=12210 [2019-10-13 22:59:25,670 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 111 states. [2019-10-13 22:59:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 22:59:34,499 INFO L93 Difference]: Finished difference Result 106 states and 153 transitions. [2019-10-13 22:59:34,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-10-13 22:59:34,499 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 54 [2019-10-13 22:59:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 22:59:34,502 INFO L225 Difference]: With dead ends: 106 [2019-10-13 22:59:34,503 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 22:59:34,511 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 55 SyntacticMatches, 46 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10298 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=14238, Invalid=29234, Unknown=0, NotChecked=0, Total=43472 [2019-10-13 22:59:34,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 22:59:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-10-13 22:59:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 22:59:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-10-13 22:59:34,526 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 54 [2019-10-13 22:59:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 22:59:34,526 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-10-13 22:59:34,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-10-13 22:59:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-10-13 22:59:34,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 22:59:34,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 22:59:34,528 INFO L380 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 22:59:34,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:34,733 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 22:59:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 22:59:34,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1451853377, now seen corresponding path program 4 times [2019-10-13 22:59:34,734 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 22:59:34,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673401762] [2019-10-13 22:59:34,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:34,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 22:59:34,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 22:59:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:39,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673401762] [2019-10-13 22:59:39,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049521776] [2019-10-13 22:59:39,919 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 22:59:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 22:59:40,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 97 conjunts are in the unsatisfiable core [2019-10-13 22:59:40,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 22:59:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 22:59:44,592 INFO L321 TraceCheckSpWp]: Computing backward predicates...