/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:22:23,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:22:23,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:22:23,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:22:23,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:22:23,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:22:23,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:22:23,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:22:23,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:22:23,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:22:23,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:22:23,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:22:23,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:22:23,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:22:23,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:22:23,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:22:23,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:22:23,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:22:23,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:22:23,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:22:23,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:22:23,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:22:23,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:22:23,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:22:23,936 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:22:23,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:22:23,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:22:23,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:22:23,955 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 [2019-11-23 20:22:23,974 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:22:23,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:22:23,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:22:23,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:22:23,977 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:22:23,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:22:23,978 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:22:23,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:22:23,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:22:23,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:22:23,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:22:23,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:22:23,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:22:23,980 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:22:23,981 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:22:23,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:22:23,981 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:22:23,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:22:23,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:22:23,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:22:23,982 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:22:23,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:22:23,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:23,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:22:23,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:22:23,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:22:23,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:22:23,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:22:23,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:22:23,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:22:24,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:22:24,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:22:24,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:22:24,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:22:24,278 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:22:24,279 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2019-11-23 20:22:24,350 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ecb4019/1f6d51130ce24cdc8f87413614fe8387/FLAGe730d1085 [2019-11-23 20:22:24,807 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:22:24,808 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2019-11-23 20:22:24,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ecb4019/1f6d51130ce24cdc8f87413614fe8387/FLAGe730d1085 [2019-11-23 20:22:25,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88ecb4019/1f6d51130ce24cdc8f87413614fe8387 [2019-11-23 20:22:25,206 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:22:25,207 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:22:25,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:25,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:22:25,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:22:25,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a64e0cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25, skipping insertion in model container [2019-11-23 20:22:25,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:22:25,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:22:25,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:25,440 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:22:25,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:25,499 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:22:25,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25 WrapperNode [2019-11-23 20:22:25,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:25,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:25,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:22:25,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:22:25,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,596 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:25,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:22:25,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:22:25,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:22:25,631 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,641 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,650 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (1/1) ... [2019-11-23 20:22:25,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:22:25,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:22:25,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:22:25,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:22:25,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (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 [2019-11-23 20:22:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:22:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:22:25,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:22:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:22:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:22:25,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:22:26,022 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:22:26,022 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:22:26,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:26 BoogieIcfgContainer [2019-11-23 20:22:26,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:22:26,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:22:26,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:22:26,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:22:26,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:22:25" (1/3) ... [2019-11-23 20:22:26,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69694c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:26, skipping insertion in model container [2019-11-23 20:22:26,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:25" (2/3) ... [2019-11-23 20:22:26,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69694c0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:26, skipping insertion in model container [2019-11-23 20:22:26,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:26" (3/3) ... [2019-11-23 20:22:26,034 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2019-11-23 20:22:26,045 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:22:26,060 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:22:26,074 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:22:26,103 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:22:26,103 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:22:26,103 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:22:26,103 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:22:26,103 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:22:26,104 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:22:26,104 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:22:26,104 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:22:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:22:26,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:22:26,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:26,129 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:26,130 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2019-11-23 20:22:26,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:26,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770957219] [2019-11-23 20:22:26,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:22:26,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770957219] [2019-11-23 20:22:26,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:26,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:26,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479036170] [2019-11-23 20:22:26,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:26,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:26,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:26,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:26,353 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:22:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:26,408 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2019-11-23 20:22:26,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:26,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 20:22:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:26,423 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:22:26,424 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:22:26,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:22:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:22:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:22:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-23 20:22:26,482 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2019-11-23 20:22:26,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:26,483 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-23 20:22:26,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:26,484 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-23 20:22:26,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:22:26,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:26,486 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:26,487 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:26,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2019-11-23 20:22:26,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:26,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096121100] [2019-11-23 20:22:26,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:22:26,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096121100] [2019-11-23 20:22:26,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:26,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:26,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988366464] [2019-11-23 20:22:26,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:26,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:26,578 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2019-11-23 20:22:26,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:26,634 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-11-23 20:22:26,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:26,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:22:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:26,636 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:22:26,636 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:22:26,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:22:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-23 20:22:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:22:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-23 20:22:26,645 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2019-11-23 20:22:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:26,646 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-23 20:22:26,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-23 20:22:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:22:26,647 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:26,647 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:26,647 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:26,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2029995939, now seen corresponding path program 1 times [2019-11-23 20:22:26,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:26,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152301790] [2019-11-23 20:22:26,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:26,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:22:26,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152301790] [2019-11-23 20:22:26,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333300421] [2019-11-23 20:22:26,770 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 [2019-11-23 20:22:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:26,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:26,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:22:26,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:26,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:22:26,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906737276] [2019-11-23 20:22:26,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:22:26,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:26,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:22:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:26,880 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2019-11-23 20:22:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:26,925 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-11-23 20:22:26,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:22:26,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-23 20:22:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:26,927 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:22:26,927 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:22:26,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:22:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:22:26,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:22:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-23 20:22:26,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 25 [2019-11-23 20:22:26,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:26,939 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-23 20:22:26,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:22:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-23 20:22:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:22:26,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:26,943 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:27,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:27,146 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:27,148 INFO L82 PathProgramCache]: Analyzing trace with hash 2073930139, now seen corresponding path program 2 times [2019-11-23 20:22:27,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:27,149 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463663182] [2019-11-23 20:22:27,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:22:27,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463663182] [2019-11-23 20:22:27,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605739617] [2019-11-23 20:22:27,269 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 [2019-11-23 20:22:27,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:27,324 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:27,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:27,327 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:22:27,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:27,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:22:27,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995576236] [2019-11-23 20:22:27,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:22:27,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:27,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:22:27,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:27,368 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2019-11-23 20:22:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:27,488 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-23 20:22:27,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:27,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-23 20:22:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:27,489 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:22:27,490 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:22:27,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:22:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-11-23 20:22:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:22:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-11-23 20:22:27,497 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2019-11-23 20:22:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:27,497 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-11-23 20:22:27,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:22:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-11-23 20:22:27,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:22:27,499 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:27,499 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:27,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:27,704 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash 365526225, now seen corresponding path program 3 times [2019-11-23 20:22:27,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:27,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549698230] [2019-11-23 20:22:27,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:22:27,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549698230] [2019-11-23 20:22:27,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418663656] [2019-11-23 20:22:27,849 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 [2019-11-23 20:22:27,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:22:27,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:27,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:27,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:22:27,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:27,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:22:27,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463345979] [2019-11-23 20:22:27,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:27,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:27,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:27,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:27,945 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 9 states. [2019-11-23 20:22:28,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:28,086 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-11-23 20:22:28,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:22:28,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-23 20:22:28,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:28,087 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:22:28,087 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:22:28,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:22:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-11-23 20:22:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:22:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2019-11-23 20:22:28,096 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2019-11-23 20:22:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:28,096 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2019-11-23 20:22:28,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2019-11-23 20:22:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:22:28,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:28,098 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:28,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:28,302 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1465517191, now seen corresponding path program 4 times [2019-11-23 20:22:28,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:28,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757309410] [2019-11-23 20:22:28,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:22:28,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757309410] [2019-11-23 20:22:28,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563042303] [2019-11-23 20:22:28,435 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 [2019-11-23 20:22:28,507 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:28,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:28,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:28,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 20:22:28,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:28,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:22:28,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052701473] [2019-11-23 20:22:28,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:28,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:28,575 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 11 states. [2019-11-23 20:22:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:28,770 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-11-23 20:22:28,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:28,772 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-11-23 20:22:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:28,773 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:22:28,773 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:22:28,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:22:28,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-11-23 20:22:28,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:22:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2019-11-23 20:22:28,789 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 47 [2019-11-23 20:22:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:28,790 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2019-11-23 20:22:28,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2019-11-23 20:22:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:22:28,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:28,795 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:28,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:28,999 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:28,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash -736124739, now seen corresponding path program 5 times [2019-11-23 20:22:29,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:29,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056048442] [2019-11-23 20:22:29,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:22:29,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056048442] [2019-11-23 20:22:29,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56502409] [2019-11-23 20:22:29,175 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 [2019-11-23 20:22:52,518 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:22:52,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:52,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:52,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-23 20:22:52,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:52,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-23 20:22:52,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512005925] [2019-11-23 20:22:52,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:22:52,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:22:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:52,609 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 13 states. [2019-11-23 20:22:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:52,778 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-23 20:22:52,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:52,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-11-23 20:22:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:52,779 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:22:52,780 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:22:52,782 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:22:52,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-11-23 20:22:52,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:22:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2019-11-23 20:22:52,796 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 57 [2019-11-23 20:22:52,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:52,797 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2019-11-23 20:22:52,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:22:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2019-11-23 20:22:52,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:22:52,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:52,800 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:53,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:53,018 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:53,018 INFO L82 PathProgramCache]: Analyzing trace with hash -319639181, now seen corresponding path program 6 times [2019-11-23 20:22:53,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:53,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134877881] [2019-11-23 20:22:53,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:22:53,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134877881] [2019-11-23 20:22:53,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402161590] [2019-11-23 20:22:53,163 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 [2019-11-23 20:22:54,109 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:22:54,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:54,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:54,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:22:54,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:54,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:22:54,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937639194] [2019-11-23 20:22:54,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:22:54,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:54,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:22:54,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:22:54,190 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 15 states. [2019-11-23 20:22:54,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:54,376 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-11-23 20:22:54,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:22:54,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-11-23 20:22:54,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:54,378 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:22:54,378 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:22:54,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:22:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:22:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2019-11-23 20:22:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:22:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2019-11-23 20:22:54,388 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 67 [2019-11-23 20:22:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:54,388 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2019-11-23 20:22:54,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:22:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2019-11-23 20:22:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:22:54,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:54,389 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:54,595 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:54,595 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1514957143, now seen corresponding path program 7 times [2019-11-23 20:22:54,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:54,597 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446473842] [2019-11-23 20:22:54,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:54,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446473842] [2019-11-23 20:22:54,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896159745] [2019-11-23 20:22:54,723 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 [2019-11-23 20:22:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:54,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:54,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:54,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:54,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:22:54,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910365937] [2019-11-23 20:22:54,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:54,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:54,842 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 11 states. [2019-11-23 20:22:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:54,891 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2019-11-23 20:22:54,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:54,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2019-11-23 20:22:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:54,893 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:22:54,893 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:22:54,894 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:22:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:22:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:22:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2019-11-23 20:22:54,901 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 77 [2019-11-23 20:22:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:54,901 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2019-11-23 20:22:54,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2019-11-23 20:22:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:22:54,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:54,903 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:55,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:55,107 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 966853863, now seen corresponding path program 8 times [2019-11-23 20:22:55,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:55,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172404463] [2019-11-23 20:22:55,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:55,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172404463] [2019-11-23 20:22:55,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356448850] [2019-11-23 20:22:55,235 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 [2019-11-23 20:22:55,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:55,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:55,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:55,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:55,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:55,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:22:55,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789237092] [2019-11-23 20:22:55,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:55,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:55,348 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 12 states. [2019-11-23 20:22:55,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:55,386 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2019-11-23 20:22:55,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:55,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2019-11-23 20:22:55,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:55,387 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:22:55,388 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:22:55,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:22:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 20:22:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:22:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2019-11-23 20:22:55,395 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 79 [2019-11-23 20:22:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:55,396 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2019-11-23 20:22:55,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2019-11-23 20:22:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:22:55,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:55,397 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:55,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:55,601 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2014585947, now seen corresponding path program 9 times [2019-11-23 20:22:55,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:55,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712186270] [2019-11-23 20:22:55,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:22:55,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712186270] [2019-11-23 20:22:55,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903827410] [2019-11-23 20:22:55,725 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 [2019-11-23 20:22:58,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:22:58,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:58,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:22:58,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 20:22:58,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:58,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-23 20:22:58,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266278332] [2019-11-23 20:22:58,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:22:58,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:22:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:58,148 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 21 states. [2019-11-23 20:22:58,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:58,444 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2019-11-23 20:22:58,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:22:58,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-11-23 20:22:58,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:58,446 INFO L225 Difference]: With dead ends: 166 [2019-11-23 20:22:58,446 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:22:58,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:58,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:22:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-11-23 20:22:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:22:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2019-11-23 20:22:58,455 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 81 [2019-11-23 20:22:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:58,455 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2019-11-23 20:22:58,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:22:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2019-11-23 20:22:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:22:58,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:58,457 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:58,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:58,665 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -610385453, now seen corresponding path program 10 times [2019-11-23 20:22:58,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:58,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747101410] [2019-11-23 20:22:58,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:22:58,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747101410] [2019-11-23 20:22:58,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269281245] [2019-11-23 20:22:58,868 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 [2019-11-23 20:22:58,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:58,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:58,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:22:58,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:58,971 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:22:58,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:58,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:22:58,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865237211] [2019-11-23 20:22:58,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:22:58,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:22:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:58,973 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 14 states. [2019-11-23 20:22:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:59,032 INFO L93 Difference]: Finished difference Result 184 states and 194 transitions. [2019-11-23 20:22:59,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:59,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2019-11-23 20:22:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:59,034 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:22:59,034 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:22:59,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:22:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:22:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 20:22:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:22:59,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2019-11-23 20:22:59,041 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 99 [2019-11-23 20:22:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:59,041 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2019-11-23 20:22:59,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:22:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2019-11-23 20:22:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:22:59,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:59,043 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:59,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:59,253 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1470647697, now seen corresponding path program 11 times [2019-11-23 20:22:59,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:59,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332732811] [2019-11-23 20:22:59,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:22:59,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332732811] [2019-11-23 20:22:59,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997580247] [2019-11-23 20:22:59,413 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