/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_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:42,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:24:42,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:24:42,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:24:42,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:42,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:42,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:42,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:42,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:42,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:42,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:42,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:42,842 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:42,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:42,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:42,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:42,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:42,861 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:42,862 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:42,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:42,863 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 01:24:42,902 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:42,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:42,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:42,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:42,907 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:42,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:42,907 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:42,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:42,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:42,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:42,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:42,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:42,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:42,909 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:42,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:42,909 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:42,909 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:42,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:42,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:42,910 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:42,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:42,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:42,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:42,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:42,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:42,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:42,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:42,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:42,912 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 01:24:43,191 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:43,202 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:43,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:43,208 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:43,208 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:43,209 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-11-07 01:24:43,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdc54002/535493242315411895db1920b2442dd4/FLAG4bb9a875c [2019-11-07 01:24:43,708 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:43,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2019-11-07 01:24:43,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdc54002/535493242315411895db1920b2442dd4/FLAG4bb9a875c [2019-11-07 01:24:44,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fdc54002/535493242315411895db1920b2442dd4 [2019-11-07 01:24:44,065 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:44,070 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:44,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:44,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:44,088 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:44,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444a2e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44, skipping insertion in model container [2019-11-07 01:24:44,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,119 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:44,143 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:44,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:44,439 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:44,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:44,505 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:44,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44 WrapperNode [2019-11-07 01:24:44,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:44,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:44,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:44,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:44,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (1/1) ... [2019-11-07 01:24:44,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:44,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:44,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:44,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:44,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (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 01:24:44,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:44,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:44,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:44,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:44,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:44,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:44,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:44,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:45,158 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:45,159 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-07 01:24:45,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:45 BoogieIcfgContainer [2019-11-07 01:24:45,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:45,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:45,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:45,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:45,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:44" (1/3) ... [2019-11-07 01:24:45,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7898ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:45, skipping insertion in model container [2019-11-07 01:24:45,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:44" (2/3) ... [2019-11-07 01:24:45,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7898ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:45, skipping insertion in model container [2019-11-07 01:24:45,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:45" (3/3) ... [2019-11-07 01:24:45,169 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2019-11-07 01:24:45,179 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:45,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:45,200 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:45,225 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:45,225 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:45,226 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:45,226 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:45,226 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:45,226 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:45,226 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:45,227 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-07 01:24:45,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:24:45,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:45,253 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:45,255 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2120380695, now seen corresponding path program 1 times [2019-11-07 01:24:45,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:45,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130309185] [2019-11-07 01:24:45,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:45,424 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 01:24:45,425 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130309185] [2019-11-07 01:24:45,426 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:45,426 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:45,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066391247] [2019-11-07 01:24:45,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:45,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:45,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:45,451 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-07 01:24:45,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:45,545 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-11-07 01:24:45,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:45,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-07 01:24:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:45,556 INFO L225 Difference]: With dead ends: 46 [2019-11-07 01:24:45,556 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 01:24:45,559 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 01:24:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 01:24:45,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-07 01:24:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-07 01:24:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-07 01:24:45,598 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2019-11-07 01:24:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:45,599 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-07 01:24:45,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-07 01:24:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:24:45,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:45,601 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:45,601 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1248295838, now seen corresponding path program 1 times [2019-11-07 01:24:45,602 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:45,603 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783875258] [2019-11-07 01:24:45,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:24:45,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783875258] [2019-11-07 01:24:45,696 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147245774] [2019-11-07 01:24:45,696 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 01:24:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:45,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:45,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:24:45,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 01:24:45,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816822632] [2019-11-07 01:24:45,913 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:45,913 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:45,920 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:45,927 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:45,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:46,060 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:46,966 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:46,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:46,982 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:47,379 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:47,380 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:24:47,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829912357] [2019-11-07 01:24:47,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:24:47,385 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:24:47,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:24:47,388 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 17 states. [2019-11-07 01:24:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:48,192 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2019-11-07 01:24:48,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:24:48,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-11-07 01:24:48,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:48,194 INFO L225 Difference]: With dead ends: 72 [2019-11-07 01:24:48,196 INFO L226 Difference]: Without dead ends: 53 [2019-11-07 01:24:48,198 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 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 01:24:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-07 01:24:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2019-11-07 01:24:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-07 01:24:48,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-07 01:24:48,219 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 22 [2019-11-07 01:24:48,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:48,220 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-07 01:24:48,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:24:48,220 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-07 01:24:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-07 01:24:48,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:48,227 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:48,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:48,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:48,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:48,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1543679785, now seen corresponding path program 2 times [2019-11-07 01:24:48,434 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:48,434 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476175642] [2019-11-07 01:24:48,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 01:24:48,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476175642] [2019-11-07 01:24:48,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935065549] [2019-11-07 01:24:48,668 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 01:24:48,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:24:48,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:48,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:24:48,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 01:24:48,797 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-07 01:24:48,863 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450551991] [2019-11-07 01:24:48,865 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:48,865 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:48,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:48,866 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:48,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:48,901 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:49,486 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:49,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:49,500 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:49,829 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:49,829 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:24:49,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197150659] [2019-11-07 01:24:49,831 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:24:49,831 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:49,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:24:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:24:49,833 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 23 states. [2019-11-07 01:24:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:51,001 INFO L93 Difference]: Finished difference Result 123 states and 170 transitions. [2019-11-07 01:24:51,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:24:51,002 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2019-11-07 01:24:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:51,004 INFO L225 Difference]: With dead ends: 123 [2019-11-07 01:24:51,004 INFO L226 Difference]: Without dead ends: 89 [2019-11-07 01:24:51,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 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 01:24:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-07 01:24:51,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2019-11-07 01:24:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-07 01:24:51,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2019-11-07 01:24:51,022 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 40 [2019-11-07 01:24:51,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:51,022 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2019-11-07 01:24:51,022 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:24:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2019-11-07 01:24:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-07 01:24:51,025 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:51,025 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:51,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:51,239 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash 376036471, now seen corresponding path program 3 times [2019-11-07 01:24:51,239 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:51,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228157181] [2019-11-07 01:24:51,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-07 01:24:51,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228157181] [2019-11-07 01:24:51,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886565301] [2019-11-07 01:24:51,516 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 01:24:51,663 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:24:51,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:24:51,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:24:51,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-07 01:24:51,723 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-07 01:24:51,978 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040266376] [2019-11-07 01:24:51,982 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:51,982 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:51,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:51,983 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:51,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:52,004 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:52,453 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:52,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:52,461 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:52,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:52,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:24:52,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7969853] [2019-11-07 01:24:52,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:24:52,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:24:52,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:24:52,825 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 35 states. [2019-11-07 01:24:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:54,903 INFO L93 Difference]: Finished difference Result 225 states and 308 transitions. [2019-11-07 01:24:54,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:24:54,904 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 76 [2019-11-07 01:24:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:54,906 INFO L225 Difference]: With dead ends: 225 [2019-11-07 01:24:54,906 INFO L226 Difference]: Without dead ends: 161 [2019-11-07 01:24:54,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 208 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 01:24:54,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-07 01:24:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2019-11-07 01:24:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-07 01:24:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 158 transitions. [2019-11-07 01:24:54,954 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 158 transitions. Word has length 76 [2019-11-07 01:24:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:54,954 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 158 transitions. [2019-11-07 01:24:54,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:24:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 158 transitions. [2019-11-07 01:24:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-07 01:24:54,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:54,959 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:55,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:24:55,161 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:55,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1663159223, now seen corresponding path program 4 times [2019-11-07 01:24:55,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:55,163 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402452791] [2019-11-07 01:24:55,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-11-07 01:24:55,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402452791] [2019-11-07 01:24:55,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691766623] [2019-11-07 01:24:55,681 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 01:24:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:55,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:24:55,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-11-07 01:24:55,870 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2019-11-07 01:24:56,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1969241954] [2019-11-07 01:24:56,586 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-07 01:24:56,586 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:56,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:56,586 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:56,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:56,606 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:24:56,990 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:24:57,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:24:57,007 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:24:57,410 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:24:57,410 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:24:57,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944304766] [2019-11-07 01:24:57,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:24:57,412 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:24:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:24:57,415 INFO L87 Difference]: Start difference. First operand 152 states and 158 transitions. Second operand 59 states. [2019-11-07 01:25:03,573 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2019-11-07 01:25:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:03,684 INFO L93 Difference]: Finished difference Result 429 states and 584 transitions. [2019-11-07 01:25:03,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:25:03,685 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 148 [2019-11-07 01:25:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:03,689 INFO L225 Difference]: With dead ends: 429 [2019-11-07 01:25:03,690 INFO L226 Difference]: Without dead ends: 305 [2019-11-07 01:25:03,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:25:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2019-11-07 01:25:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 296. [2019-11-07 01:25:03,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-07 01:25:03,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 302 transitions. [2019-11-07 01:25:03,787 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 302 transitions. Word has length 148 [2019-11-07 01:25:03,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:03,791 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 302 transitions. [2019-11-07 01:25:03,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:25:03,791 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 302 transitions. [2019-11-07 01:25:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-07 01:25:03,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:03,808 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:04,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:04,023 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1615525321, now seen corresponding path program 5 times [2019-11-07 01:25:04,024 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:04,024 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656269898] [2019-11-07 01:25:04,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6486 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2019-11-07 01:25:05,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656269898] [2019-11-07 01:25:05,519 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785076361] [2019-11-07 01:25:05,519 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