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/array-examples/standard_init4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:58,797 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:58,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:58,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:33:58,838 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:58,838 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:58,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:58,840 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:58,841 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:58,842 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:58,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:58,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:58,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:58,849 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:58,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:58,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:58,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:58,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:58,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:58,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:58,872 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 01:33:58,906 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:58,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:58,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:58,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:58,911 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:58,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:58,911 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:58,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:58,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:58,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:58,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:58,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:58,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:58,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:58,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:58,913 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:58,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:58,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:58,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:58,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:58,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:58,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:58,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:58,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:58,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:58,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:58,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:58,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:58,915 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 01:33:59,206 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:59,218 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:59,222 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:59,223 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:59,224 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:59,225 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-10-15 01:33:59,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6f86e7d/e28bc11861a040e796f8f0c61c3d3339/FLAGffae36fac [2019-10-15 01:33:59,808 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:59,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-10-15 01:33:59,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6f86e7d/e28bc11861a040e796f8f0c61c3d3339/FLAGffae36fac [2019-10-15 01:34:00,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f6f86e7d/e28bc11861a040e796f8f0c61c3d3339 [2019-10-15 01:34:00,224 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:00,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:00,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:00,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:00,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:00,232 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ddb9b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00, skipping insertion in model container [2019-10-15 01:34:00,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,243 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:00,263 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:00,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:00,452 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:00,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:00,490 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:00,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00 WrapperNode [2019-10-15 01:34:00,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:00,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:00,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:00,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:00,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (1/1) ... [2019-10-15 01:34:00,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:00,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:00,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:00,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:00,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (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 01:34:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:00,677 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:00,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:00,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:00,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:01,075 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:01,075 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:34:01,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:01 BoogieIcfgContainer [2019-10-15 01:34:01,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:01,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:01,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:01,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:01,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:00" (1/3) ... [2019-10-15 01:34:01,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2a6fe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:01, skipping insertion in model container [2019-10-15 01:34:01,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:00" (2/3) ... [2019-10-15 01:34:01,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c2a6fe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:01, skipping insertion in model container [2019-10-15 01:34:01,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:01" (3/3) ... [2019-10-15 01:34:01,084 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2019-10-15 01:34:01,091 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:01,098 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:01,110 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:01,135 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:01,135 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:01,135 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:01,135 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:01,136 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:01,136 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:01,136 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:01,136 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:34:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:34:01,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:01,158 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:01,160 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:01,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:01,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2001495867, now seen corresponding path program 1 times [2019-10-15 01:34:01,172 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:01,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044208939] [2019-10-15 01:34:01,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:01,328 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 01:34:01,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044208939] [2019-10-15 01:34:01,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:01,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:01,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424636002] [2019-10-15 01:34:01,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:01,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:01,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:01,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:01,349 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:34:01,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:01,420 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:34:01,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:01,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:34:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:01,428 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:34:01,429 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:34:01,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 01:34:01,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:34:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:34:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:34:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:34:01,467 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-10-15 01:34:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:01,467 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:34:01,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:34:01,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:34:01,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:01,469 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:01,469 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:01,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1527613737, now seen corresponding path program 1 times [2019-10-15 01:34:01,470 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:01,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358819127] [2019-10-15 01:34:01,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:01,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:34:01,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358819127] [2019-10-15 01:34:01,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734920926] [2019-10-15 01:34:01,556 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 01:34:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:01,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:01,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:34:01,660 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:34:01,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814593340] [2019-10-15 01:34:01,734 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:34:01,734 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:01,741 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:01,749 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:01,750 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:01,930 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:02,822 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:02,835 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:02,841 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:03,423 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:03,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:03,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561294070] [2019-10-15 01:34:03,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:03,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:03,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:03,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:03,431 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2019-10-15 01:34:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:04,281 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-10-15 01:34:04,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:04,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-10-15 01:34:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:04,284 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:34:04,284 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:34:04,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:34:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-10-15 01:34:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:34:04,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-15 01:34:04,307 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2019-10-15 01:34:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:04,309 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-15 01:34:04,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:04,309 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-15 01:34:04,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:34:04,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:04,312 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:04,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:04,516 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:04,517 INFO L82 PathProgramCache]: Analyzing trace with hash -549318725, now seen corresponding path program 2 times [2019-10-15 01:34:04,518 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:04,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170110617] [2019-10-15 01:34:04,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:04,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:04,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:34:04,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170110617] [2019-10-15 01:34:04,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32236646] [2019-10-15 01:34:04,682 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 [2019-10-15 01:34:04,761 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:04,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:04,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:04,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:34:04,781 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:34:04,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472320032] [2019-10-15 01:34:04,842 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:34:04,842 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:04,844 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:04,844 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:04,844 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:04,892 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:05,459 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:05,484 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:05,495 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:06,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:06,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:06,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474054237] [2019-10-15 01:34:06,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:06,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:06,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:06,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:06,145 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 23 states. [2019-10-15 01:34:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:07,140 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2019-10-15 01:34:07,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:07,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-15 01:34:07,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:07,142 INFO L225 Difference]: With dead ends: 91 [2019-10-15 01:34:07,142 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 01:34:07,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 72 SyntacticMatches, 15 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 01:34:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2019-10-15 01:34:07,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:34:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-10-15 01:34:07,156 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 30 [2019-10-15 01:34:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:07,157 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-10-15 01:34:07,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-10-15 01:34:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 01:34:07,158 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,159 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:07,363 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,364 INFO L82 PathProgramCache]: Analyzing trace with hash -622463877, now seen corresponding path program 3 times [2019-10-15 01:34:07,365 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392470975] [2019-10-15 01:34:07,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-15 01:34:07,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392470975] [2019-10-15 01:34:07,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805031570] [2019-10-15 01:34:07,545 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 [2019-10-15 01:34:07,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:07,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:07,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:07,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-15 01:34:07,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-15 01:34:07,860 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466306745] [2019-10-15 01:34:07,861 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:34:07,862 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:07,862 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:07,862 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:07,863 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:07,883 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:08,273 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:08,281 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:08,286 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:09,330 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:09,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:09,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551606231] [2019-10-15 01:34:09,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:09,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:09,334 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 35 states. [2019-10-15 01:34:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:11,385 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2019-10-15 01:34:11,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:11,385 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 54 [2019-10-15 01:34:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:11,389 INFO L225 Difference]: With dead ends: 157 [2019-10-15 01:34:11,389 INFO L226 Difference]: Without dead ends: 115 [2019-10-15 01:34:11,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 109 SyntacticMatches, 33 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:11,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-15 01:34:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2019-10-15 01:34:11,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-15 01:34:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2019-10-15 01:34:11,413 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 54 [2019-10-15 01:34:11,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:11,413 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2019-10-15 01:34:11,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2019-10-15 01:34:11,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-15 01:34:11,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:11,417 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:11,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:11,627 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1843842555, now seen corresponding path program 4 times [2019-10-15 01:34:11,629 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773047439] [2019-10-15 01:34:11,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-10-15 01:34:12,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773047439] [2019-10-15 01:34:12,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398419896] [2019-10-15 01:34:12,094 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 [2019-10-15 01:34:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:12,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:12,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-10-15 01:34:12,249 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-10-15 01:34:12,881 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908619412] [2019-10-15 01:34:12,882 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:34:12,882 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:12,883 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:12,883 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:12,883 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:12,913 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:13,299 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:13,304 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:13,307 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:15,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:15,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:15,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967260084] [2019-10-15 01:34:15,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:15,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:15,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:15,312 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 59 states. [2019-10-15 01:34:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:19,782 INFO L93 Difference]: Finished difference Result 289 states and 392 transitions. [2019-10-15 01:34:19,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:19,782 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 102 [2019-10-15 01:34:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:19,785 INFO L225 Difference]: With dead ends: 289 [2019-10-15 01:34:19,785 INFO L226 Difference]: Without dead ends: 211 [2019-10-15 01:34:19,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 205 SyntacticMatches, 69 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7652 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-15 01:34:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2019-10-15 01:34:19,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-10-15 01:34:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2019-10-15 01:34:19,816 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 102 [2019-10-15 01:34:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:19,816 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2019-10-15 01:34:19,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2019-10-15 01:34:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-15 01:34:19,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:19,831 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:20,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:20,033 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash -171130629, now seen corresponding path program 5 times [2019-10-15 01:34:20,034 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:20,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771726295] [2019-10-15 01:34:20,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,035 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:20,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2019-10-15 01:34:21,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771726295] [2019-10-15 01:34:21,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893767645] [2019-10-15 01:34:21,450 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true