/usr/bin/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-fb55353 [2019-11-07 01:24:08,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:24:08,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:24:08,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:24:08,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:08,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:08,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:08,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:08,657 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:08,658 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:08,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:08,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:08,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:08,672 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:08,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:08,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:08,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:08,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:08,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:08,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:08,702 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 [2019-11-07 01:24:08,723 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:08,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:08,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:08,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:08,725 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:08,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:08,726 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:08,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:08,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:08,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:08,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:08,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:08,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:08,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:08,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:08,729 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:08,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:08,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:08,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:08,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:08,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:08,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:08,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:08,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:08,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:08,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:08,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:08,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:08,731 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 [2019-11-07 01:24:09,019 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:09,035 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:09,040 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:09,042 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:09,042 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:09,043 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-11-07 01:24:09,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ee4949b/22b4ccdeafd84df687b383a8994ced26/FLAG66727d5ae [2019-11-07 01:24:09,577 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:09,577 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init4_ground-2.i [2019-11-07 01:24:09,584 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ee4949b/22b4ccdeafd84df687b383a8994ced26/FLAG66727d5ae [2019-11-07 01:24:10,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ee4949b/22b4ccdeafd84df687b383a8994ced26 [2019-11-07 01:24:10,054 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:10,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:10,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:10,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:10,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:10,076 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5ac96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10, skipping insertion in model container [2019-11-07 01:24:10,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,106 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:10,129 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:10,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:10,394 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:10,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:10,445 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:10,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10 WrapperNode [2019-11-07 01:24:10,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:10,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:10,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:10,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:10,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (1/1) ... [2019-11-07 01:24:10,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:10,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:10,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:10,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:10,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (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 [2019-11-07 01:24:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:10,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:10,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:10,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:10,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:10,979 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:10,980 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 01:24:10,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:10 BoogieIcfgContainer [2019-11-07 01:24:10,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:10,982 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:10,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:10,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:10,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:10" (1/3) ... [2019-11-07 01:24:10,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461121a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:10, skipping insertion in model container [2019-11-07 01:24:10,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:10" (2/3) ... [2019-11-07 01:24:10,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461121a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:10, skipping insertion in model container [2019-11-07 01:24:10,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:10" (3/3) ... [2019-11-07 01:24:10,989 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init4_ground-2.i [2019-11-07 01:24:11,001 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:11,008 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:11,017 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:11,038 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:11,038 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:11,038 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:11,038 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:11,039 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:11,039 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:11,039 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:11,039 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 01:24:11,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:24:11,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:11,063 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:11,066 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2001495867, now seen corresponding path program 1 times [2019-11-07 01:24:11,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:11,080 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660324050] [2019-11-07 01:24:11,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:11,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:24:11,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660324050] [2019-11-07 01:24:11,235 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:11,236 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:11,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40131041] [2019-11-07 01:24:11,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:11,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:11,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:11,257 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-07 01:24:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:11,326 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-11-07 01:24:11,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:11,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-07 01:24:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:11,336 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:24:11,336 INFO L226 Difference]: Without dead ends: 22 [2019-11-07 01:24:11,339 INFO L630 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 [2019-11-07 01:24:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-07 01:24:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-07 01:24:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:24:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-07 01:24:11,374 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-11-07 01:24:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:11,375 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-07 01:24:11,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:11,375 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-07 01:24:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:24:11,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:11,376 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:11,377 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:11,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1527613737, now seen corresponding path program 1 times [2019-11-07 01:24:11,377 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:11,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230768503] [2019-11-07 01:24:11,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:11,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:24:11,458 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230768503] [2019-11-07 01:24:11,459 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378470046] [2019-11-07 01:24:11,459 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 [2019-11-07 01:24:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:11,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:11,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:24:11,570 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:24:11,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1504195460] [2019-11-07 01:24:11,660 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:11,661 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:11,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:11,693 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:11,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:11,973 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:12,574 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:12,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:12,585 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:12,959 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:12,960 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:24:12,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347471085] [2019-11-07 01:24:12,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:24:12,964 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:12,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:24:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:24:12,965 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2019-11-07 01:24:13,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:13,751 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-11-07 01:24:13,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:24:13,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-11-07 01:24:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:13,753 INFO L225 Difference]: With dead ends: 58 [2019-11-07 01:24:13,754 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 01:24:13,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:24:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 01:24:13,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-11-07 01:24:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-07 01:24:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-07 01:24:13,766 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2019-11-07 01:24:13,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:13,766 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-07 01:24:13,766 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:24:13,766 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-07 01:24:13,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-07 01:24:13,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:13,768 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:13,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:13,971 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:13,972 INFO L82 PathProgramCache]: Analyzing trace with hash -549318725, now seen corresponding path program 2 times [2019-11-07 01:24:13,973 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:13,973 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349797775] [2019-11-07 01:24:13,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:24:14,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349797775] [2019-11-07 01:24:14,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718091946] [2019-11-07 01:24:14,125 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 [2019-11-07 01:24:14,193 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:24:14,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:14,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:24:14,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:24:14,209 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-07 01:24:14,273 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745013501] [2019-11-07 01:24:14,274 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:14,275 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:14,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:14,275 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:14,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:14,304 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:14,769 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:14,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:14,785 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:15,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:15,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:24:15,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757893012] [2019-11-07 01:24:15,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:24:15,118 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:24:15,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:24:15,120 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 23 states. [2019-11-07 01:24:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:16,104 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2019-11-07 01:24:16,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:24:16,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-11-07 01:24:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:16,109 INFO L225 Difference]: With dead ends: 91 [2019-11-07 01:24:16,109 INFO L226 Difference]: Without dead ends: 67 [2019-11-07 01:24:16,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:24:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-07 01:24:16,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2019-11-07 01:24:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-07 01:24:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-07 01:24:16,137 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 30 [2019-11-07 01:24:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:16,137 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-07 01:24:16,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:24:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-07 01:24:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-07 01:24:16,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:16,142 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:16,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:16,343 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:16,344 INFO L82 PathProgramCache]: Analyzing trace with hash -622463877, now seen corresponding path program 3 times [2019-11-07 01:24:16,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:16,345 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124612991] [2019-11-07 01:24:16,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-07 01:24:16,541 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124612991] [2019-11-07 01:24:16,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879043423] [2019-11-07 01:24:16,542 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 [2019-11-07 01:24:16,648 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:24:16,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:16,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:24:16,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-07 01:24:16,687 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-11-07 01:24:16,993 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171159316] [2019-11-07 01:24:16,995 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:16,995 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:16,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:16,996 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:16,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:17,022 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:17,309 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:17,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:17,317 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:17,667 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:17,667 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:24:17,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783808870] [2019-11-07 01:24:17,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:24:17,669 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:17,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:24:17,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:24:17,670 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 35 states. [2019-11-07 01:24:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:19,505 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2019-11-07 01:24:19,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:24:19,506 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 54 [2019-11-07 01:24:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:19,507 INFO L225 Difference]: With dead ends: 157 [2019-11-07 01:24:19,507 INFO L226 Difference]: Without dead ends: 115 [2019-11-07 01:24:19,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:24:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-07 01:24:19,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2019-11-07 01:24:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-07 01:24:19,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2019-11-07 01:24:19,528 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 54 [2019-11-07 01:24:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:19,528 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2019-11-07 01:24:19,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:24:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2019-11-07 01:24:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-07 01:24:19,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:19,532 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:19,735 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:19,735 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1843842555, now seen corresponding path program 4 times [2019-11-07 01:24:19,736 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:19,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77679770] [2019-11-07 01:24:19,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-11-07 01:24:20,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77679770] [2019-11-07 01:24:20,223 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595836182] [2019-11-07 01:24:20,223 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 [2019-11-07 01:24:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:20,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:24:20,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-11-07 01:24:20,388 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-11-07 01:24:21,095 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [138109353] [2019-11-07 01:24:21,096 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 01:24:21,097 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:21,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:21,098 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:21,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:21,121 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:21,387 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:21,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:21,396 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:21,787 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:21,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:24:21,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512269271] [2019-11-07 01:24:21,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:24:21,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:21,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:24:21,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:24:21,793 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 59 states. [2019-11-07 01:24:26,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:26,531 INFO L93 Difference]: Finished difference Result 289 states and 392 transitions. [2019-11-07 01:24:26,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:24:26,532 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 102 [2019-11-07 01:24:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:26,540 INFO L225 Difference]: With dead ends: 289 [2019-11-07 01:24:26,540 INFO L226 Difference]: Without dead ends: 211 [2019-11-07 01:24:26,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:24:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-11-07 01:24:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2019-11-07 01:24:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-07 01:24:26,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2019-11-07 01:24:26,618 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 102 [2019-11-07 01:24:26,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:26,621 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2019-11-07 01:24:26,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:24:26,621 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2019-11-07 01:24:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-07 01:24:26,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:26,638 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:26,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:26,853 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:26,854 INFO L82 PathProgramCache]: Analyzing trace with hash -171130629, now seen corresponding path program 5 times [2019-11-07 01:24:26,854 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:26,854 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752677398] [2019-11-07 01:24:26,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2019-11-07 01:24:28,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752677398] [2019-11-07 01:24:28,338 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853710534] [2019-11-07 01:24:28,338 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