/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:28:08,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:28:08,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:28:08,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:28:08,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:28:08,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:28:08,636 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:28:08,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:28:08,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:28:08,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:28:08,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:28:08,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:28:08,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:28:08,645 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:28:08,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:28:08,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:28:08,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:28:08,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:28:08,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:28:08,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:28:08,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:28:08,684 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:28:08,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:28:08,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:28:08,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:28:08,686 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:28:08,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:28:08,686 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:28:08,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:28:08,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:28:08,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:28:08,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:28:08,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:28:08,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:28:08,687 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:28:08,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:28:08,688 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:28:08,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:28:08,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:28:08,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:28:08,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:28:08,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:28:08,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:08,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:28:08,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:28:08,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:28:08,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:28:08,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:28:08,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:28:08,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 01:28:08,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:28:08,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:28:08,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:28:08,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:28:08,968 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:28:08,969 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-07 01:28:09,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de0dc9a37/657c70acb0fb4709b3d2cc429c3f99ed/FLAGc33fe6b21 [2019-11-07 01:28:09,480 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:28:09,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-07 01:28:09,488 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de0dc9a37/657c70acb0fb4709b3d2cc429c3f99ed/FLAGc33fe6b21 [2019-11-07 01:28:09,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de0dc9a37/657c70acb0fb4709b3d2cc429c3f99ed [2019-11-07 01:28:09,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:28:09,907 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:28:09,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:09,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:28:09,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:28:09,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7a63ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:09, skipping insertion in model container [2019-11-07 01:28:09,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:28:09" (1/1) ... [2019-11-07 01:28:09,924 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:28:09,943 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:28:10,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:10,123 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:28:10,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:28:10,160 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:28:10,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10 WrapperNode [2019-11-07 01:28:10,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:28:10,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:28:10,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:28:10,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:28:10,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... [2019-11-07 01:28:10,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:28:10,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:28:10,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:28:10,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:28:10,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:28:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:28:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:28:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:28:10,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:28:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:28:10,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:28:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:28:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:28:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:28:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:28:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:28:10,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:28:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:28:10,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:28:10,661 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:28:10,661 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-07 01:28:10,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:10 BoogieIcfgContainer [2019-11-07 01:28:10,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:28:10,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:28:10,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:28:10,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:28:10,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:28:09" (1/3) ... [2019-11-07 01:28:10,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5210462a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:10, skipping insertion in model container [2019-11-07 01:28:10,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:28:10" (2/3) ... [2019-11-07 01:28:10,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5210462a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:28:10, skipping insertion in model container [2019-11-07 01:28:10,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:28:10" (3/3) ... [2019-11-07 01:28:10,683 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2019-11-07 01:28:10,706 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:28:10,719 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:28:10,730 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:28:10,752 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:28:10,752 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:28:10,752 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:28:10,753 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:28:10,753 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:28:10,753 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:28:10,753 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:28:10,753 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:28:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 01:28:10,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:28:10,774 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:10,775 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:10,777 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:10,783 INFO L82 PathProgramCache]: Analyzing trace with hash 187881276, now seen corresponding path program 1 times [2019-11-07 01:28:10,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:10,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217512350] [2019-11-07 01:28:10,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:10,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217512350] [2019-11-07 01:28:10,956 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:28:10,957 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:28:10,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126710599] [2019-11-07 01:28:10,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:28:10,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:28:10,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:28:10,982 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-07 01:28:11,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:11,057 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2019-11-07 01:28:11,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:28:11,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:28:11,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:11,072 INFO L225 Difference]: With dead ends: 40 [2019-11-07 01:28:11,072 INFO L226 Difference]: Without dead ends: 23 [2019-11-07 01:28:11,076 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:28:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-07 01:28:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-11-07 01:28:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:28:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:28:11,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-07 01:28:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:11,129 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:28:11,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:28:11,130 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:28:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:28:11,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:11,135 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:11,136 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:11,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:11,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1754018738, now seen corresponding path program 1 times [2019-11-07 01:28:11,137 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:11,138 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967808110] [2019-11-07 01:28:11,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:11,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967808110] [2019-11-07 01:28:11,260 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109403037] [2019-11-07 01:28:11,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:11,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:28:11,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:11,390 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:11,426 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62857025] [2019-11-07 01:28:11,455 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:11,455 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:11,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:11,467 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:11,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:11,628 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:11,900 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:11,920 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:11,923 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:12,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:12,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 16 [2019-11-07 01:28:12,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626737221] [2019-11-07 01:28:12,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 01:28:12,242 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:12,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 01:28:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2019-11-07 01:28:12,245 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-11-07 01:28:12,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:12,876 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-11-07 01:28:12,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 01:28:12,877 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-11-07 01:28:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:12,879 INFO L225 Difference]: With dead ends: 54 [2019-11-07 01:28:12,879 INFO L226 Difference]: Without dead ends: 43 [2019-11-07 01:28:12,880 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2019-11-07 01:28:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-07 01:28:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 21. [2019-11-07 01:28:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 01:28:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-07 01:28:12,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2019-11-07 01:28:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:12,889 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-07 01:28:12,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-07 01:28:12,890 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-07 01:28:12,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-07 01:28:12,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:12,891 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:13,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:13,095 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:13,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1907323972, now seen corresponding path program 2 times [2019-11-07 01:28:13,097 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:13,097 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746521914] [2019-11-07 01:28:13,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:13,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746521914] [2019-11-07 01:28:13,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620690794] [2019-11-07 01:28:13,200 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:13,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:28:13,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:13,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:28:13,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:13,277 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:13,343 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [682552476] [2019-11-07 01:28:13,344 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:13,345 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:13,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:13,345 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:13,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:13,371 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:13,528 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:13,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:13,545 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:13,779 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:13,779 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 22 [2019-11-07 01:28:13,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148891441] [2019-11-07 01:28:13,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 01:28:13,780 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:13,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 01:28:13,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2019-11-07 01:28:13,783 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 22 states. [2019-11-07 01:28:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:14,671 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-11-07 01:28:14,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 01:28:14,672 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2019-11-07 01:28:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:14,674 INFO L225 Difference]: With dead ends: 90 [2019-11-07 01:28:14,674 INFO L226 Difference]: Without dead ends: 79 [2019-11-07 01:28:14,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 01:28:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-07 01:28:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 27. [2019-11-07 01:28:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:28:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-07 01:28:14,700 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2019-11-07 01:28:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:14,701 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-07 01:28:14,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 01:28:14,701 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-07 01:28:14,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 01:28:14,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:14,703 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:14,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:14,907 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:14,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:14,908 INFO L82 PathProgramCache]: Analyzing trace with hash 335045244, now seen corresponding path program 3 times [2019-11-07 01:28:14,908 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:14,909 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333347645] [2019-11-07 01:28:14,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:15,195 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333347645] [2019-11-07 01:28:15,196 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183559276] [2019-11-07 01:28:15,196 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:15,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:28:15,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:28:15,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:28:15,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:15,279 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:15,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:15,476 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87035546] [2019-11-07 01:28:15,477 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:15,478 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:15,478 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:15,479 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:15,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:15,503 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:15,644 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:15,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:15,652 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:15,918 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:15,918 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 34 [2019-11-07 01:28:15,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403083927] [2019-11-07 01:28:15,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-07 01:28:15,919 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:15,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-07 01:28:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=752, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 01:28:15,920 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 34 states. [2019-11-07 01:28:17,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:17,693 INFO L93 Difference]: Finished difference Result 162 states and 218 transitions. [2019-11-07 01:28:17,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 01:28:17,695 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 22 [2019-11-07 01:28:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:17,698 INFO L225 Difference]: With dead ends: 162 [2019-11-07 01:28:17,698 INFO L226 Difference]: Without dead ends: 151 [2019-11-07 01:28:17,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1055, Invalid=2727, Unknown=0, NotChecked=0, Total=3782 [2019-11-07 01:28:17,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-07 01:28:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 39. [2019-11-07 01:28:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-07 01:28:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-07 01:28:17,719 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2019-11-07 01:28:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:17,719 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-07 01:28:17,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-07 01:28:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-07 01:28:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:28:17,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:17,721 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:17,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:17,922 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:17,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:17,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1332731900, now seen corresponding path program 4 times [2019-11-07 01:28:17,923 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:17,924 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394377178] [2019-11-07 01:28:17,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:18,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394377178] [2019-11-07 01:28:18,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945402205] [2019-11-07 01:28:18,302 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:18,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:28:18,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:28:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:18,392 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:28:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:19,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881401620] [2019-11-07 01:28:19,108 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:28:19,108 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:28:19,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:28:19,108 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:28:19,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:28:19,139 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:28:19,247 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:28:19,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:28:19,255 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:28:19,566 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:28:19,566 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 58 [2019-11-07 01:28:19,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072774045] [2019-11-07 01:28:19,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-07 01:28:19,568 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:28:19,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-07 01:28:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1294, Invalid=2012, Unknown=0, NotChecked=0, Total=3306 [2019-11-07 01:28:19,576 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 58 states. [2019-11-07 01:28:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:28:23,909 INFO L93 Difference]: Finished difference Result 306 states and 422 transitions. [2019-11-07 01:28:23,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-07 01:28:23,910 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 34 [2019-11-07 01:28:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:28:23,914 INFO L225 Difference]: With dead ends: 306 [2019-11-07 01:28:23,915 INFO L226 Difference]: Without dead ends: 295 [2019-11-07 01:28:23,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2649 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3779, Invalid=8211, Unknown=0, NotChecked=0, Total=11990 [2019-11-07 01:28:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-11-07 01:28:23,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 63. [2019-11-07 01:28:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-07 01:28:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-11-07 01:28:23,950 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2019-11-07 01:28:23,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:28:23,950 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-11-07 01:28:23,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-07 01:28:23,951 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-11-07 01:28:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-07 01:28:23,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:28:23,952 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:28:24,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:28:24,161 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:28:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:28:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash 5118716, now seen corresponding path program 5 times [2019-11-07 01:28:24,162 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:28:24,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055217560] [2019-11-07 01:28:24,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:28:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:28:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:28:25,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055217560] [2019-11-07 01:28:25,346 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28589852] [2019-11-07 01:28:25,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true