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_shadowinit.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:28,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:28,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:28,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:36:28,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:28,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:28,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:28,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:28,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:28,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:28,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:28,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:28,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:28,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:28,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:28,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:28,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:36:28,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:28,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:28,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:28,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:36:28,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:28,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:28,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:28,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:28,838 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:28,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:28,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:28,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:28,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:28,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:28,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:28,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:28,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:28,840 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:28,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:28,840 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:28,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:28,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:28,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:28,841 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:28,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:28,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:28,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:28,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:28,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:28,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:28,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:28,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:28,843 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:36:29,152 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:29,173 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:29,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:29,178 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:29,178 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:29,179 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-10-15 01:36:29,236 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0310de4/0872e788dd714f02a8b356e8087e5740/FLAG325971370 [2019-10-15 01:36:29,664 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:29,665 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_shadowinit.i [2019-10-15 01:36:29,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0310de4/0872e788dd714f02a8b356e8087e5740/FLAG325971370 [2019-10-15 01:36:30,043 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a0310de4/0872e788dd714f02a8b356e8087e5740 [2019-10-15 01:36:30,051 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:30,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:30,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:30,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:30,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:30,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b193a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30, skipping insertion in model container [2019-10-15 01:36:30,063 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,072 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:30,094 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:30,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:30,259 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:30,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:30,295 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:30,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30 WrapperNode [2019-10-15 01:36:30,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:30,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:30,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:30,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:30,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... [2019-10-15 01:36:30,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:30,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:30,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:30,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:30,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:30,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:30,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:30,494 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:30,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:30,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:30,495 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:36:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:30,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:30,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:30,842 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:30,842 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:36:30,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:30 BoogieIcfgContainer [2019-10-15 01:36:30,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:30,845 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:30,845 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:30,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:30,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:30" (1/3) ... [2019-10-15 01:36:30,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618e0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:30, skipping insertion in model container [2019-10-15 01:36:30,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:30" (2/3) ... [2019-10-15 01:36:30,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618e0b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:30, skipping insertion in model container [2019-10-15 01:36:30,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:30" (3/3) ... [2019-10-15 01:36:30,853 INFO L109 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2019-10-15 01:36:30,867 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:30,877 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:30,892 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:30,928 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:30,928 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:30,928 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:30,928 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:30,929 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:30,929 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:30,929 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:30,929 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-15 01:36:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:36:30,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:30,963 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:30,968 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:30,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1398188510, now seen corresponding path program 1 times [2019-10-15 01:36:30,986 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:30,986 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593164502] [2019-10-15 01:36:30,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:30,987 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:30,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:31,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593164502] [2019-10-15 01:36:31,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:31,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:36:31,262 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795022986] [2019-10-15 01:36:31,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:36:31,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:31,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:36:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:36:31,284 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-10-15 01:36:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:31,354 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-10-15 01:36:31,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:36:31,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:36:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:31,364 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:36:31,364 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:36:31,367 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:36:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:36:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:36:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:36:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-10-15 01:36:31,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2019-10-15 01:36:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:31,410 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-10-15 01:36:31,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:36:31,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-10-15 01:36:31,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:36:31,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:31,411 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:31,412 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2852601, now seen corresponding path program 1 times [2019-10-15 01:36:31,413 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:31,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430212725] [2019-10-15 01:36:31,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:31,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:31,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:31,647 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430212725] [2019-10-15 01:36:31,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748567682] [2019-10-15 01:36:31,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:31,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 01:36:31,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:31,794 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-15 01:36:31,795 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:36:31,808 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:36:31,809 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:36:31,809 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-10-15 01:36:31,837 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-10-15 01:36:31,838 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-15 01:36:31,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:36:31,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:36:31,843 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:7 [2019-10-15 01:36:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:31,889 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:31,975 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-10-15 01:36:31,991 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2019-10-15 01:36:31,992 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-10-15 01:36:32,000 INFO L567 ElimStorePlain]: treesize reduction 4, result has 63.6 percent of original size [2019-10-15 01:36:32,000 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:36:32,003 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-15 01:36:32,004 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-15 01:36:32,004 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2019-10-15 01:36:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:32,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [317711878] [2019-10-15 01:36:32,093 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:36:32,093 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:32,101 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:32,108 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:32,109 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:32,319 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:36:32,761 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:32,787 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:32,800 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:33,877 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:33,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 01:36:33,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804721201] [2019-10-15 01:36:33,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-15 01:36:33,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:33,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-15 01:36:33,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2019-10-15 01:36:33,885 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 25 states. [2019-10-15 01:36:34,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:34,523 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2019-10-15 01:36:34,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:36:34,523 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 13 [2019-10-15 01:36:34,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:34,524 INFO L225 Difference]: With dead ends: 26 [2019-10-15 01:36:34,524 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:36:34,526 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2019-10-15 01:36:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:36:34,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-15 01:36:34,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 01:36:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-15 01:36:34,534 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 13 [2019-10-15 01:36:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:34,534 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-15 01:36:34,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-15 01:36:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-15 01:36:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:36:34,535 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:34,536 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:34,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,743 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:34,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:34,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1841809294, now seen corresponding path program 1 times [2019-10-15 01:36:34,745 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:34,745 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916500129] [2019-10-15 01:36:34,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:34,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:34,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916500129] [2019-10-15 01:36:34,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974767994] [2019-10-15 01:36:34,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:34,959 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:34,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1111421278] [2019-10-15 01:36:34,994 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:34,994 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:34,995 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:34,995 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:34,995 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:35,029 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:36:35,697 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:35,715 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:35,724 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:36,499 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:36,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 12] total 23 [2019-10-15 01:36:36,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982481387] [2019-10-15 01:36:36,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:36:36,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:36,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:36:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:36:36,504 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 23 states. [2019-10-15 01:36:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:37,601 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2019-10-15 01:36:37,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-15 01:36:37,602 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:36:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:37,607 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:36:37,607 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:36:37,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:36:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:36:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2019-10-15 01:36:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:36:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 01:36:37,628 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2019-10-15 01:36:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:37,629 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 01:36:37,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:36:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 01:36:37,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:36:37,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:37,633 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:37,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:37,837 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:37,838 INFO L82 PathProgramCache]: Analyzing trace with hash -501757299, now seen corresponding path program 2 times [2019-10-15 01:36:37,838 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:37,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251224546] [2019-10-15 01:36:37,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:37,839 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:37,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:38,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251224546] [2019-10-15 01:36:38,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127475759] [2019-10-15 01:36:38,015 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:38,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:36:38,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:38,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:36:38,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:38,319 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:38,421 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1007465684] [2019-10-15 01:36:38,422 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:38,423 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:38,423 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:38,423 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:38,424 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:38,466 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:36:38,835 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:38,857 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:38,869 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:39,850 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:39,851 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10, 12] total 35 [2019-10-15 01:36:39,851 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124855377] [2019-10-15 01:36:39,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:36:39,855 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:39,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:36:39,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:36:39,856 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 35 states. [2019-10-15 01:36:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:41,222 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-10-15 01:36:41,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:36:41,223 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 21 [2019-10-15 01:36:41,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:41,225 INFO L225 Difference]: With dead ends: 32 [2019-10-15 01:36:41,225 INFO L226 Difference]: Without dead ends: 30 [2019-10-15 01:36:41,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=268, Invalid=2282, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 01:36:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-15 01:36:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-15 01:36:41,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:36:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-10-15 01:36:41,234 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2019-10-15 01:36:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:41,235 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-10-15 01:36:41,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:36:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-10-15 01:36:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:36:41,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:41,237 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:41,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:41,441 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:41,442 INFO L82 PathProgramCache]: Analyzing trace with hash -340228514, now seen corresponding path program 3 times [2019-10-15 01:36:41,442 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:41,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005273162] [2019-10-15 01:36:41,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,443 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:41,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:41,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005273162] [2019-10-15 01:36:41,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027844668] [2019-10-15 01:36:41,535 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:41,598 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:41,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:41,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 01:36:41,602 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:41,664 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:41,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262467030] [2019-10-15 01:36:41,706 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:41,706 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:41,707 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:41,707 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:41,707 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:41,739 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:36:42,079 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:42,089 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:42,093 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:42,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:42,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 12] total 26 [2019-10-15 01:36:42,809 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024800607] [2019-10-15 01:36:42,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:36:42,810 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:42,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:36:42,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:36:42,811 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 26 states. [2019-10-15 01:36:44,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:44,324 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2019-10-15 01:36:44,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 01:36:44,325 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2019-10-15 01:36:44,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:44,326 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:36:44,326 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:36:44,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=354, Invalid=2096, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:36:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:36:44,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-10-15 01:36:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:36:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-10-15 01:36:44,335 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2019-10-15 01:36:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:44,335 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-10-15 01:36:44,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:36:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-10-15 01:36:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 01:36:44,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:44,337 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:44,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:44,541 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:44,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:44,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1759654535, now seen corresponding path program 4 times [2019-10-15 01:36:44,542 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:44,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392559093] [2019-10-15 01:36:44,542 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:44,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:44,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:44,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392559093] [2019-10-15 01:36:44,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082885048] [2019-10-15 01:36:44,680 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 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 [2019-10-15 01:36:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:44,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-15 01:36:44,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:45,082 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:45,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968494325] [2019-10-15 01:36:45,138 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:45,138 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:45,138 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:45,139 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:45,139 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:45,161 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:36:45,440 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:45,454 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:45,459 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:46,407 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:46,408 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 12] total 36 [2019-10-15 01:36:46,408 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725593217] [2019-10-15 01:36:46,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-15 01:36:46,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:46,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-15 01:36:46,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1150, Unknown=0, NotChecked=0, Total=1260 [2019-10-15 01:36:46,410 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 36 states. [2019-10-15 01:36:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:47,943 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-10-15 01:36:47,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-15 01:36:47,944 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 29 [2019-10-15 01:36:47,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:47,946 INFO L225 Difference]: With dead ends: 38 [2019-10-15 01:36:47,946 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:36:47,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 01:36:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:36:47,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-10-15 01:36:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:36:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-10-15 01:36:47,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2019-10-15 01:36:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:47,973 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-10-15 01:36:47,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-15 01:36:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-10-15 01:36:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 01:36:47,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:47,974 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:48,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:48,185 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:48,186 INFO L82 PathProgramCache]: Analyzing trace with hash 702652914, now seen corresponding path program 5 times [2019-10-15 01:36:48,186 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:48,186 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653078276] [2019-10-15 01:36:48,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:48,187 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:48,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:48,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653078276] [2019-10-15 01:36:48,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36700125] [2019-10-15 01:36:48,292 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:48,371 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 01:36:48,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:48,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:36:48,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:48,441 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:48,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1489444524] [2019-10-15 01:36:48,489 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:48,489 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:48,489 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:48,489 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:48,489 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:48,511 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:36:48,772 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:48,782 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:48,787 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:49,888 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:49,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10, 12] total 29 [2019-10-15 01:36:49,888 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009077581] [2019-10-15 01:36:49,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 01:36:49,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:49,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 01:36:49,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:36:49,890 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 29 states. [2019-10-15 01:36:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:51,663 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2019-10-15 01:36:51,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 01:36:51,664 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-15 01:36:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:51,666 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:36:51,666 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:36:51,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=495, Invalid=2927, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:36:51,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:36:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-15 01:36:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:36:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-10-15 01:36:51,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 36 [2019-10-15 01:36:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:51,676 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-10-15 01:36:51,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 01:36:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-10-15 01:36:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:51,677 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:51,678 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:51,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:51,880 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1044880909, now seen corresponding path program 6 times [2019-10-15 01:36:51,881 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:51,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119116058] [2019-10-15 01:36:51,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:51,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:51,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:52,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119116058] [2019-10-15 01:36:52,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451634418] [2019-10-15 01:36:52,057 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:52,143 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:36:52,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:52,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-15 01:36:52,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:52,542 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:52,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:36:52,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [590743050] [2019-10-15 01:36:52,609 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:52,609 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:52,609 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:52,610 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:52,610 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:52,628 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-15 01:36:52,879 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:52,890 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:52,894 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:53,892 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:53,893 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14, 12] total 40 [2019-10-15 01:36:53,893 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596487005] [2019-10-15 01:36:53,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 01:36:53,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 01:36:53,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:36:53,896 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 40 states. [2019-10-15 01:36:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:56,036 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-10-15 01:36:56,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:36:56,037 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 37 [2019-10-15 01:36:56,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:56,038 INFO L225 Difference]: With dead ends: 42 [2019-10-15 01:36:56,039 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 01:36:56,041 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=361, Invalid=3671, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:36:56,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 01:36:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-10-15 01:36:56,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:36:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-15 01:36:56,049 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 37 [2019-10-15 01:36:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:56,049 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-15 01:36:56,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 01:36:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-15 01:36:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:36:56,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:56,051 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:56,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:56,255 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -717503778, now seen corresponding path program 7 times [2019-10-15 01:36:56,256 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:56,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933676050] [2019-10-15 01:36:56,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:56,257 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:56,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:36:56,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933676050] [2019-10-15 01:36:56,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945134388] [2019-10-15 01:36:56,349 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:56,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:36:56,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:36:56,539 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:36:56,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574448854] [2019-10-15 01:36:56,597 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:56,597 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:56,597 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:56,598 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:56,598 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:56,615 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:36:56,867 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:36:56,874 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:36:56,877 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:57,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:36:57,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12, 12] total 32 [2019-10-15 01:36:57,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590475072] [2019-10-15 01:36:57,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 01:36:57,723 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 01:36:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2019-10-15 01:36:57,724 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 32 states. [2019-10-15 01:36:59,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:59,906 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2019-10-15 01:36:59,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-15 01:36:59,907 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2019-10-15 01:36:59,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:59,909 INFO L225 Difference]: With dead ends: 72 [2019-10-15 01:36:59,909 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:36:59,913 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=664, Invalid=3892, Unknown=0, NotChecked=0, Total=4556 [2019-10-15 01:36:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:36:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-10-15 01:36:59,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-15 01:36:59,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-15 01:36:59,938 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 44 [2019-10-15 01:36:59,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:59,938 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-15 01:36:59,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 01:36:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-15 01:36:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:36:59,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:59,944 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:00,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:00,158 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1256360967, now seen corresponding path program 8 times [2019-10-15 01:37:00,159 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:00,159 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921512299] [2019-10-15 01:37:00,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:00,159 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:00,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:37:00,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921512299] [2019-10-15 01:37:00,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854983803] [2019-10-15 01:37:00,512 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:00,650 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:37:00,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:00,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-15 01:37:00,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:37:01,366 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 01:37:01,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777735550] [2019-10-15 01:37:01,795 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:01,795 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:01,796 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:01,796 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:01,796 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:01,823 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:37:02,181 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:37:02,191 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:37:02,197 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:03,647 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:37:03,648 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 16, 12] total 56 [2019-10-15 01:37:03,648 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388244237] [2019-10-15 01:37:03,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-15 01:37:03,649 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-15 01:37:03,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2866, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 01:37:03,651 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 56 states. [2019-10-15 01:37:08,774 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2019-10-15 01:37:08,966 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2019-10-15 01:37:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:09,293 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2019-10-15 01:37:09,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-15 01:37:09,301 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 45 [2019-10-15 01:37:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:09,305 INFO L225 Difference]: With dead ends: 74 [2019-10-15 01:37:09,305 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 01:37:09,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 85 SyntacticMatches, 12 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=931, Invalid=9781, Unknown=0, NotChecked=0, Total=10712 [2019-10-15 01:37:09,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 01:37:09,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-10-15 01:37:09,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-15 01:37:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2019-10-15 01:37:09,320 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 45 [2019-10-15 01:37:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:09,321 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2019-10-15 01:37:09,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-15 01:37:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2019-10-15 01:37:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-15 01:37:09,322 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:09,322 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:09,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:09,527 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1971982733, now seen corresponding path program 9 times [2019-10-15 01:37:09,527 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:09,528 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997813861] [2019-10-15 01:37:09,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:09,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:09,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:37:09,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997813861] [2019-10-15 01:37:09,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147395884] [2019-10-15 01:37:09,797 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:09,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:09,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:09,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-15 01:37:09,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:37:10,617 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:37:10,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [216902794] [2019-10-15 01:37:10,690 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:37:10,691 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:10,691 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:10,691 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:10,691 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:10,712 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-15 01:37:10,952 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2019-10-15 01:37:10,962 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-15 01:37:10,967 INFO L183 IcfgInterpreter]: Interpretation finished