/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-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:28:07,492 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:28:07,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:28:07,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:28:07,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:28:07,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:28:07,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:28:07,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:28:07,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:28:07,550 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:28:07,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:28:07,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:28:07,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:28:07,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:28:07,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:28:07,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:28:07,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:28:07,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:28:07,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:28:07,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:28:07,586 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 01:28:07,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:28:07,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:28:07,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:28:07,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:28:07,609 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:28:07,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:28:07,610 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:28:07,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:28:07,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:28:07,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:28:07,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:28:07,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:28:07,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:28:07,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:28:07,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:28:07,613 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:28:07,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:28:07,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:28:07,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:28:07,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:28:07,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:28:07,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:07,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:28:07,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:28:07,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:28:07,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:28:07,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:28:07,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:28:07,616 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 01:28:07,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:28:07,923 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:28:07,926 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:28:07,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:28:07,927 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:28:07,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-07 01:28:08,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a56b6f8b/21483ffa88054b44ae1e9d286d08a6bb/FLAG6986f81f6 [2019-11-07 01:28:08,454 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:28:08,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-07 01:28:08,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a56b6f8b/21483ffa88054b44ae1e9d286d08a6bb/FLAG6986f81f6 [2019-11-07 01:28:08,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a56b6f8b/21483ffa88054b44ae1e9d286d08a6bb [2019-11-07 01:28:08,964 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:28:08,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:28:08,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:08,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:28:08,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:28:08,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3775140e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:08, skipping insertion in model container [2019-11-07 01:28:08,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:08" (1/1) ... [2019-11-07 01:28:08,982 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:28:09,003 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:28:09,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:09,200 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:28:09,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:09,235 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:28:09,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09 WrapperNode [2019-11-07 01:28:09,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:09,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:28:09,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:28:09,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:28:09,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,340 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:28:09,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:28:09,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:28:09,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:28:09,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (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 01:28:09,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:28:09,407 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:28:09,407 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:28:09,407 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:28:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:28:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:28:09,756 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:28:09,757 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:28:09,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:09 BoogieIcfgContainer [2019-11-07 01:28:09,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:28:09,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:28:09,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:28:09,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:28:09,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:08" (1/3) ... [2019-11-07 01:28:09,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37883707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:09, skipping insertion in model container [2019-11-07 01:28:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09" (2/3) ... [2019-11-07 01:28:09,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37883707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:09, skipping insertion in model container [2019-11-07 01:28:09,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:09" (3/3) ... [2019-11-07 01:28:09,770 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2019-11-07 01:28:09,781 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:28:09,794 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:28:09,805 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:28:09,828 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:28:09,828 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:28:09,828 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:28:09,829 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:28:09,829 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:28:09,829 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:28:09,829 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:28:09,829 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:28:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-07 01:28:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 01:28:09,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:09,850 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:09,852 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1038582055, now seen corresponding path program 1 times [2019-11-07 01:28:09,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:09,865 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979392155] [2019-11-07 01:28:09,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:10,019 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 01:28:10,021 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979392155] [2019-11-07 01:28:10,022 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:28:10,022 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:28:10,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208019100] [2019-11-07 01:28:10,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:28:10,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:28:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:28:10,043 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-07 01:28:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:10,111 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-11-07 01:28:10,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:28:10,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-07 01:28:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:10,128 INFO L225 Difference]: With dead ends: 34 [2019-11-07 01:28:10,129 INFO L226 Difference]: Without dead ends: 19 [2019-11-07 01:28:10,137 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 01:28:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-07 01:28:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2019-11-07 01:28:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-07 01:28:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-07 01:28:10,187 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-11-07 01:28:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:10,188 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-07 01:28:10,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:28:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-07 01:28:10,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:28:10,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:10,190 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:10,190 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:10,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1360247690, now seen corresponding path program 1 times [2019-11-07 01:28:10,191 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:10,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688324536] [2019-11-07 01:28:10,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:10,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688324536] [2019-11-07 01:28:10,257 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646942950] [2019-11-07 01:28:10,258 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 01:28:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:10,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:28:10,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:10,350 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:10,411 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720880552] [2019-11-07 01:28:10,438 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 01:28:10,438 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:10,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:10,452 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:10,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:10,589 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:10,868 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:10,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:10,886 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:11,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:11,359 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:28:11,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063529980] [2019-11-07 01:28:11,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:28:11,362 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:11,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:28:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:28:11,364 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 17 states. [2019-11-07 01:28:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:12,044 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-07 01:28:12,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:28:12,045 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2019-11-07 01:28:12,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:12,047 INFO L225 Difference]: With dead ends: 44 [2019-11-07 01:28:12,047 INFO L226 Difference]: Without dead ends: 35 [2019-11-07 01:28:12,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2019-11-07 01:28:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-07 01:28:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 19. [2019-11-07 01:28:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 01:28:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-07 01:28:12,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-11-07 01:28:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:12,059 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-07 01:28:12,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:28:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-07 01:28:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 01:28:12,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:12,060 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:12,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:12,265 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:12,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1001094681, now seen corresponding path program 2 times [2019-11-07 01:28:12,266 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:12,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148851512] [2019-11-07 01:28:12,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:12,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148851512] [2019-11-07 01:28:12,371 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996688727] [2019-11-07 01:28:12,371 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 01:28:12,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:28:12,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:12,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:28:12,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:12,443 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:12,507 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48182994] [2019-11-07 01:28:12,509 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 01:28:12,509 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:12,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:12,511 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:12,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:12,547 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:12,661 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:12,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:12,673 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:13,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:13,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:28:13,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734825814] [2019-11-07 01:28:13,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:28:13,039 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:28:13,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:28:13,040 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 23 states. [2019-11-07 01:28:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:13,990 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2019-11-07 01:28:13,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:28:13,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 15 [2019-11-07 01:28:13,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:13,992 INFO L225 Difference]: With dead ends: 68 [2019-11-07 01:28:13,992 INFO L226 Difference]: Without dead ends: 59 [2019-11-07 01:28:13,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2019-11-07 01:28:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-07 01:28:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 25. [2019-11-07 01:28:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 01:28:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-07 01:28:14,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-11-07 01:28:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:14,007 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-07 01:28:14,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:28:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-07 01:28:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-07 01:28:14,010 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:14,010 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:14,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:14,220 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 804785927, now seen corresponding path program 3 times [2019-11-07 01:28:14,221 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:14,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352067536] [2019-11-07 01:28:14,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:14,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352067536] [2019-11-07 01:28:14,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739285616] [2019-11-07 01:28:14,374 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 01:28:14,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:28:14,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:14,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:28:14,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:14,447 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:14,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:14,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1612162610] [2019-11-07 01:28:14,684 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 01:28:14,685 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:14,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:14,686 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:14,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:14,733 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:14,817 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:14,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:14,826 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:15,166 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:15,167 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:28:15,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706006163] [2019-11-07 01:28:15,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:28:15,168 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:15,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:28:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:28:15,170 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 35 states. [2019-11-07 01:28:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:16,959 INFO L93 Difference]: Finished difference Result 116 states and 149 transitions. [2019-11-07 01:28:16,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 01:28:16,960 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 21 [2019-11-07 01:28:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:16,962 INFO L225 Difference]: With dead ends: 116 [2019-11-07 01:28:16,962 INFO L226 Difference]: Without dead ends: 107 [2019-11-07 01:28:16,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1063, Invalid=2843, Unknown=0, NotChecked=0, Total=3906 [2019-11-07 01:28:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-07 01:28:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 37. [2019-11-07 01:28:16,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-07 01:28:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-07 01:28:16,981 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2019-11-07 01:28:16,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:16,982 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-07 01:28:16,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:28:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-07 01:28:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-07 01:28:16,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:16,984 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:17,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:17,185 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1965153977, now seen corresponding path program 4 times [2019-11-07 01:28:17,186 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:17,186 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252305320] [2019-11-07 01:28:17,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:17,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252305320] [2019-11-07 01:28:17,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305671435] [2019-11-07 01:28:17,562 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 01:28:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:17,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:28:17,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:17,677 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:18,299 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104295749] [2019-11-07 01:28:18,300 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-11-07 01:28:18,300 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:18,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:18,310 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:18,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:18,346 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:18,424 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:18,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:18,430 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:18,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:18,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:28:18,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348232831] [2019-11-07 01:28:18,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:28:18,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:18,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:28:18,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=2123, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:28:18,825 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 59 states. [2019-11-07 01:28:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:23,215 INFO L93 Difference]: Finished difference Result 212 states and 281 transitions. [2019-11-07 01:28:23,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-07 01:28:23,215 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 33 [2019-11-07 01:28:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:23,219 INFO L225 Difference]: With dead ends: 212 [2019-11-07 01:28:23,219 INFO L226 Difference]: Without dead ends: 203 [2019-11-07 01:28:23,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3787, Invalid=8423, Unknown=0, NotChecked=0, Total=12210 [2019-11-07 01:28:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-07 01:28:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 61. [2019-11-07 01:28:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-07 01:28:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-11-07 01:28:23,253 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2019-11-07 01:28:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:23,254 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-11-07 01:28:23,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:28:23,254 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-11-07 01:28:23,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-07 01:28:23,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:23,256 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:23,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:23,460 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:23,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1906432569, now seen corresponding path program 5 times [2019-11-07 01:28:23,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:23,461 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924394627] [2019-11-07 01:28:23,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:24,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924394627] [2019-11-07 01:28:24,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346037702] [2019-11-07 01:28:24,679 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