/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 -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:47:20,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:47:20,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:47:20,904 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:47:20,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:47:20,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:47:20,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:47:20,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:47:20,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:47:20,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:47:20,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:47:20,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:47:20,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:47:20,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:47:20,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:47:20,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:47:20,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:47:20,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:47:20,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:47:20,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:47:20,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:47:20,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:47:20,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:47:20,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:47:20,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:47:20,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:47:20,953 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:47:20,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:47:20,956 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 [2019-11-06 18:47:20,978 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:47:20,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:47:20,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:47:20,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:47:20,981 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:47:20,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:47:20,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:47:20,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:47:20,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:47:20,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:47:20,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:47:20,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:47:20,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:47:20,984 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:47:20,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:47:20,984 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:47:20,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:47:20,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:47:20,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:47:20,985 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:47:20,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:47:20,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:20,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:47:20,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:47:20,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:47:20,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:47:20,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:47:20,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:47:20,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:47:21,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:47:21,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:47:21,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:47:21,310 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:47:21,310 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:47:21,311 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_02.i [2019-11-06 18:47:21,383 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a380beaf/0270869a6e904709b474f7b4340420da/FLAGcb2d934e9 [2019-11-06 18:47:21,856 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:47:21,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_02.i [2019-11-06 18:47:21,865 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a380beaf/0270869a6e904709b474f7b4340420da/FLAGcb2d934e9 [2019-11-06 18:47:22,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a380beaf/0270869a6e904709b474f7b4340420da [2019-11-06 18:47:22,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:47:22,260 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:47:22,261 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:22,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:47:22,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:47:22,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7a6f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22, skipping insertion in model container [2019-11-06 18:47:22,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,276 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:47:22,290 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:47:22,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:22,455 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:47:22,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:22,492 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:47:22,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22 WrapperNode [2019-11-06 18:47:22,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:22,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:47:22,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:47:22,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:47:22,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,611 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (1/1) ... [2019-11-06 18:47:22,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:47:22,619 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:47:22,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:47:22,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:47:22,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (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 [2019-11-06 18:47:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:47:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:47:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:47:22,682 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:47:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:47:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:47:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:47:22,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:47:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:47:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:47:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:47:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:47:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:47:22,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:47:22,896 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:47:22,897 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:47:22,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:22 BoogieIcfgContainer [2019-11-06 18:47:22,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:47:22,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:47:22,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:47:22,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:47:22,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:47:22" (1/3) ... [2019-11-06 18:47:22,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2439882b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:22, skipping insertion in model container [2019-11-06 18:47:22,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:22" (2/3) ... [2019-11-06 18:47:22,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2439882b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:22, skipping insertion in model container [2019-11-06 18:47:22,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:22" (3/3) ... [2019-11-06 18:47:22,905 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_02.i [2019-11-06 18:47:22,915 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:47:22,922 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:47:22,934 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:47:22,969 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:47:22,969 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:47:22,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:47:22,970 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:47:22,970 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:47:22,970 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:47:22,970 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:47:22,971 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:47:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 18:47:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:23,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:23,003 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:23,005 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:23,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-11-06 18:47:23,022 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:23,022 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436280622] [2019-11-06 18:47:23,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:23,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436280622] [2019-11-06 18:47:23,178 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:23,178 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:47:23,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103916339] [2019-11-06 18:47:23,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:47:23,190 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:47:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:23,210 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 18:47:23,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:23,338 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-11-06 18:47:23,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:47:23,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:47:23,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:23,354 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:47:23,354 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:47:23,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:47:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:47:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:47:23,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-06 18:47:23,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-06 18:47:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:23,414 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-06 18:47:23,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:47:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-06 18:47:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:23,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:23,417 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:23,418 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:23,419 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-11-06 18:47:23,419 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:23,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373386861] [2019-11-06 18:47:23,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:23,513 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373386861] [2019-11-06 18:47:23,513 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:23,514 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:23,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147801673] [2019-11-06 18:47:23,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:23,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:23,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:23,519 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-06 18:47:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:23,592 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 18:47:23,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:23,593 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:47:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:23,595 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:47:23,596 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:47:23,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:47:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:47:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:47:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:47:23,608 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-06 18:47:23,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:23,609 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:47:23,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:47:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:47:23,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:23,611 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:23,612 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:23,614 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-11-06 18:47:23,614 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:23,614 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459384072] [2019-11-06 18:47:23,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:23,697 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459384072] [2019-11-06 18:47:23,698 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:23,698 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:23,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135082998] [2019-11-06 18:47:23,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:23,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:23,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:23,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:23,700 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:47:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:23,765 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 18:47:23,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:23,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:47:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:23,768 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:47:23,768 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:47:23,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:47:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-06 18:47:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:47:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:47:23,779 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-06 18:47:23,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:23,779 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:47:23,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:23,779 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:47:23,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:47:23,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:23,780 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:23,781 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:23,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:23,781 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-11-06 18:47:23,781 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:23,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980554900] [2019-11-06 18:47:23,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:23,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980554900] [2019-11-06 18:47:23,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677868980] [2019-11-06 18:47:23,857 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 [2019-11-06 18:47:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:23,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:47:23,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:23,990 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:23,990 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:47:23,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2909759] [2019-11-06 18:47:23,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:47:23,991 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:23,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:47:23,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:23,994 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 18:47:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:24,120 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:47:24,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:47:24,121 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:47:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:24,122 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:47:24,122 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:47:24,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:24,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:47:24,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-06 18:47:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:47:24,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:47:24,129 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-11-06 18:47:24,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:24,130 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:47:24,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:47:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:47:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:47:24,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:24,131 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:24,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:24,336 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:24,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-11-06 18:47:24,336 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:24,336 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836090402] [2019-11-06 18:47:24,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:47:24,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836090402] [2019-11-06 18:47:24,444 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955769745] [2019-11-06 18:47:24,444 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:47:24,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:24,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:24,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:24,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:24,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:24,537 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:24,537 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-06 18:47:24,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515409401] [2019-11-06 18:47:24,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:47:24,538 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:24,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:47:24,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:47:24,539 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 9 states. [2019-11-06 18:47:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:24,643 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2019-11-06 18:47:24,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:47:24,643 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-11-06 18:47:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:24,644 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:47:24,644 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:47:24,645 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:47:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:47:24,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-11-06 18:47:24,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:47:24,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-06 18:47:24,651 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2019-11-06 18:47:24,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:24,652 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-06 18:47:24,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:47:24,652 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-06 18:47:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:47:24,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:24,653 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:24,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:24,858 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash -456457883, now seen corresponding path program 3 times [2019-11-06 18:47:24,859 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:24,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587125182] [2019-11-06 18:47:24,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:47:24,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587125182] [2019-11-06 18:47:24,980 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62866219] [2019-11-06 18:47:24,981 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 [2019-11-06 18:47:25,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:47:25,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:25,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:25,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:47:25,055 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:25,055 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:47:25,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777126387] [2019-11-06 18:47:25,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:47:25,059 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:25,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:47:25,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:25,060 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2019-11-06 18:47:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:25,196 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2019-11-06 18:47:25,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:47:25,196 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-06 18:47:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:25,197 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:47:25,198 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:47:25,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:47:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2019-11-06 18:47:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:47:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-06 18:47:25,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-06 18:47:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:25,209 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-06 18:47:25,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:47:25,210 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-06 18:47:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:47:25,213 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:25,213 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:25,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:25,417 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:25,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:25,418 INFO L82 PathProgramCache]: Analyzing trace with hash 911814026, now seen corresponding path program 4 times [2019-11-06 18:47:25,418 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:25,418 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103348220] [2019-11-06 18:47:25,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:47:25,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103348220] [2019-11-06 18:47:25,525 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935387498] [2019-11-06 18:47:25,525 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 [2019-11-06 18:47:25,571 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:25,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:25,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:47:25,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:47:25,626 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:25,626 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2019-11-06 18:47:25,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893171687] [2019-11-06 18:47:25,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:47:25,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:25,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:47:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:47:25,630 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2019-11-06 18:47:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:25,800 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2019-11-06 18:47:25,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:47:25,801 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-11-06 18:47:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:25,802 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:47:25,802 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:47:25,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:47:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:47:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2019-11-06 18:47:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:47:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-06 18:47:25,810 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2019-11-06 18:47:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:25,810 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-06 18:47:25,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:47:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-06 18:47:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:47:25,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:25,812 INFO L410 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:26,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:26,025 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash 569821353, now seen corresponding path program 5 times [2019-11-06 18:47:26,027 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:26,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465879532] [2019-11-06 18:47:26,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:26,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465879532] [2019-11-06 18:47:26,178 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696180037] [2019-11-06 18:47:26,179 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-06 18:47:26,322 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-06 18:47:26,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:26,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:47:26,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:26,341 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:26,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:47:26,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93619404] [2019-11-06 18:47:26,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:26,344 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:26,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:26,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:26,346 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 10 states. [2019-11-06 18:47:26,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:26,501 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-11-06 18:47:26,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:47:26,501 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-06 18:47:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:26,502 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:47:26,502 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:47:26,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:47:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-11-06 18:47:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:47:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-06 18:47:26,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2019-11-06 18:47:26,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:26,513 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-06 18:47:26,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:26,513 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-06 18:47:26,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:47:26,514 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:26,514 INFO L410 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:26,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:26,715 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1633268026, now seen corresponding path program 6 times [2019-11-06 18:47:26,715 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:26,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127409013] [2019-11-06 18:47:26,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:26,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127409013] [2019-11-06 18:47:26,814 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945073118] [2019-11-06 18:47:26,814 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:47:26,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-06 18:47:26,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:26,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:47:26,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:26,911 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:26,911 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:47:26,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300048819] [2019-11-06 18:47:26,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:47:26,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:26,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:47:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:47:26,913 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2019-11-06 18:47:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:27,059 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2019-11-06 18:47:27,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:47:27,060 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-11-06 18:47:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:27,061 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:47:27,062 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:47:27,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:47:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:47:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2019-11-06 18:47:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:47:27,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-06 18:47:27,069 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-06 18:47:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:27,069 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-06 18:47:27,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:47:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-06 18:47:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:47:27,070 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:27,071 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:27,274 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:27,275 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:27,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1209562039, now seen corresponding path program 7 times [2019-11-06 18:47:27,276 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:27,276 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022415231] [2019-11-06 18:47:27,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:27,398 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022415231] [2019-11-06 18:47:27,399 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279988340] [2019-11-06 18:47:27,399 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 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 [2019-11-06 18:47:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:27,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:47:27,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:47:27,518 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:27,520 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2019-11-06 18:47:27,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776664451] [2019-11-06 18:47:27,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:47:27,521 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:27,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:47:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:47:27,522 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 17 states. [2019-11-06 18:47:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:27,754 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-06 18:47:27,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:47:27,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-11-06 18:47:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:27,756 INFO L225 Difference]: With dead ends: 83 [2019-11-06 18:47:27,756 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:47:27,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=151, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:47:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:47:27,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 40. [2019-11-06 18:47:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:47:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-11-06 18:47:27,765 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2019-11-06 18:47:27,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:27,765 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-11-06 18:47:27,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:47:27,765 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-11-06 18:47:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:47:27,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:27,766 INFO L410 BasicCegarLoop]: trace histogram [13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:27,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:27,970 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:27,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:27,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1251926602, now seen corresponding path program 8 times [2019-11-06 18:47:27,971 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:27,972 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617223280] [2019-11-06 18:47:27,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 18:47:28,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617223280] [2019-11-06 18:47:28,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440324158] [2019-11-06 18:47:28,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:47:28,214 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:28,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:28,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:47:28,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:47:28,302 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:28,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 20 [2019-11-06 18:47:28,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927485746] [2019-11-06 18:47:28,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:47:28,305 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:28,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:47:28,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:47:28,306 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 20 states. [2019-11-06 18:47:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:28,722 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2019-11-06 18:47:28,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:47:28,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2019-11-06 18:47:28,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:28,723 INFO L225 Difference]: With dead ends: 91 [2019-11-06 18:47:28,724 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:47:28,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:47:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:47:28,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 44. [2019-11-06 18:47:28,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:47:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-06 18:47:28,739 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2019-11-06 18:47:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:28,739 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-06 18:47:28,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:47:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-06 18:47:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:47:28,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:28,741 INFO L410 BasicCegarLoop]: trace histogram [16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:28,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:28,945 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1090835945, now seen corresponding path program 9 times [2019-11-06 18:47:28,946 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:28,946 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419768085] [2019-11-06 18:47:28,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:47:29,121 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419768085] [2019-11-06 18:47:29,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617237108] [2019-11-06 18:47:29,123 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 [2019-11-06 18:47:29,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:47:29,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:29,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:47:29,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:47:29,639 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:29,639 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:47:29,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396622577] [2019-11-06 18:47:29,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:47:29,640 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:29,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:47:29,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:29,641 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 14 states. [2019-11-06 18:47:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:29,847 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2019-11-06 18:47:29,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:47:29,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-11-06 18:47:29,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:29,850 INFO L225 Difference]: With dead ends: 85 [2019-11-06 18:47:29,850 INFO L226 Difference]: Without dead ends: 75 [2019-11-06 18:47:29,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:47:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-06 18:47:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-11-06 18:47:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:47:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-06 18:47:29,861 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2019-11-06 18:47:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:29,862 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-06 18:47:29,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:47:29,864 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-06 18:47:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:47:29,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:29,865 INFO L410 BasicCegarLoop]: trace histogram [16, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:30,070 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:30,070 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1633282438, now seen corresponding path program 10 times [2019-11-06 18:47:30,071 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:30,071 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202382268] [2019-11-06 18:47:30,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:47:30,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202382268] [2019-11-06 18:47:30,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539592548] [2019-11-06 18:47:30,201 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 [2019-11-06 18:47:30,258 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:47:30,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:30,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:47:30,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:47:30,381 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:30,381 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 24 [2019-11-06 18:47:30,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787157379] [2019-11-06 18:47:30,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:47:30,382 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:30,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:47:30,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:47:30,383 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 24 states. [2019-11-06 18:47:30,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:30,626 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2019-11-06 18:47:30,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:47:30,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 41 [2019-11-06 18:47:30,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:30,628 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:47:30,628 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:47:30,629 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=254, Invalid=298, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:47:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:47:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 50. [2019-11-06 18:47:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:47:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-06 18:47:30,637 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 41 [2019-11-06 18:47:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:30,637 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-06 18:47:30,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:47:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-06 18:47:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:47:30,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:30,639 INFO L410 BasicCegarLoop]: trace histogram [20, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:30,843 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:30,844 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:30,844 INFO L82 PathProgramCache]: Analyzing trace with hash 128958601, now seen corresponding path program 11 times [2019-11-06 18:47:30,844 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:30,844 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430310026] [2019-11-06 18:47:30,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-06 18:47:30,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430310026] [2019-11-06 18:47:30,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252673985] [2019-11-06 18:47:30,990 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:45,316 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-06 18:47:45,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:45,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:47:45,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:47:45,455 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:45,455 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 27 [2019-11-06 18:47:45,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030307698] [2019-11-06 18:47:45,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:47:45,456 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:47:45,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:47:45,458 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 27 states. [2019-11-06 18:47:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:45,709 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2019-11-06 18:47:45,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:47:45,709 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 46 [2019-11-06 18:47:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:45,710 INFO L225 Difference]: With dead ends: 113 [2019-11-06 18:47:45,710 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:47:45,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=376, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:47:45,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:47:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 54. [2019-11-06 18:47:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:47:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-06 18:47:45,728 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2019-11-06 18:47:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:45,729 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-06 18:47:45,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:47:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-06 18:47:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:47:45,732 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:45,732 INFO L410 BasicCegarLoop]: trace histogram [23, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:45,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:45,943 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1673837942, now seen corresponding path program 12 times [2019-11-06 18:47:45,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:45,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421621631] [2019-11-06 18:47:45,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 18:47:46,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421621631] [2019-11-06 18:47:46,118 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360186224] [2019-11-06 18:47:46,119 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:11,908 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:48:11,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:11,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:48:11,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 18:48:11,970 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:11,971 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-06 18:48:11,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863384841] [2019-11-06 18:48:11,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:48:11,974 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:48:11,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:48:11,975 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 17 states. [2019-11-06 18:48:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:12,184 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2019-11-06 18:48:12,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:48:12,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-11-06 18:48:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:12,186 INFO L225 Difference]: With dead ends: 104 [2019-11-06 18:48:12,187 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:48:12,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:48:12,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:48:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2019-11-06 18:48:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:48:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-06 18:48:12,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2019-11-06 18:48:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:12,196 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-06 18:48:12,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:48:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-06 18:48:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:48:12,197 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:12,197 INFO L410 BasicCegarLoop]: trace histogram [23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:12,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:12,403 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1827737861, now seen corresponding path program 13 times [2019-11-06 18:48:12,404 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:12,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872516927] [2019-11-06 18:48:12,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-06 18:48:12,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872516927] [2019-11-06 18:48:12,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775225453] [2019-11-06 18:48:12,571 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:12,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:48:12,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 18:48:12,802 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:12,802 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 30 [2019-11-06 18:48:12,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916271093] [2019-11-06 18:48:12,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:48:12,802 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:12,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:48:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=463, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:48:12,803 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 30 states. [2019-11-06 18:48:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:13,097 INFO L93 Difference]: Finished difference Result 126 states and 147 transitions. [2019-11-06 18:48:13,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:48:13,098 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 51 [2019-11-06 18:48:13,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:13,100 INFO L225 Difference]: With dead ends: 126 [2019-11-06 18:48:13,100 INFO L226 Difference]: Without dead ends: 101 [2019-11-06 18:48:13,102 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=407, Invalid=463, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:48:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-06 18:48:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2019-11-06 18:48:13,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 18:48:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-11-06 18:48:13,108 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 51 [2019-11-06 18:48:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:13,109 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-11-06 18:48:13,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:48:13,109 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-11-06 18:48:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:48:13,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:13,110 INFO L410 BasicCegarLoop]: trace histogram [26, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:13,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:13,316 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash -509720378, now seen corresponding path program 14 times [2019-11-06 18:48:13,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:13,317 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703558594] [2019-11-06 18:48:13,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY