/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:22:21,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:22:21,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:22:21,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:22:21,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:22:21,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:22:21,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:22:21,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:22:21,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:22:21,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:22:21,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:22:21,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:22:21,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:22:21,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:22:21,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:22:21,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:22:21,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:22:21,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:22:21,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:22:21,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:22:21,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:22:21,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:22:21,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:22:21,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:22:21,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:22:21,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:22:21,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:22:21,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:22:21,317 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 20:22:21,345 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:22:21,345 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:22:21,346 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:22:21,347 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:22:21,347 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:22:21,347 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:22:21,347 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:22:21,347 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:22:21,348 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:22:21,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:22:21,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:22:21,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:22:21,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:22:21,351 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:22:21,351 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:22:21,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:22:21,351 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:22:21,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:22:21,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:22:21,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:22:21,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:22:21,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:22:21,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:22:21,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:22:21,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:22:21,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:22:21,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:22:21,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:22:21,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:22:21,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:22:21,629 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:22:21,640 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:22:21,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:22:21,650 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:22:21,650 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:22:21,653 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-11-23 20:22:21,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d19dbab/5c5f49a84c734092bd94599f8e32bcc1/FLAGd2c599eee [2019-11-23 20:22:22,213 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:22:22,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-1.i [2019-11-23 20:22:22,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d19dbab/5c5f49a84c734092bd94599f8e32bcc1/FLAGd2c599eee [2019-11-23 20:22:22,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53d19dbab/5c5f49a84c734092bd94599f8e32bcc1 [2019-11-23 20:22:22,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:22:22,647 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:22:22,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:22,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:22:22,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:22:22,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:22,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6163be9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22, skipping insertion in model container [2019-11-23 20:22:22,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:22,665 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:22:22,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:22:22,878 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:22,882 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:22:22,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:22:22,925 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:22:22,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22 WrapperNode [2019-11-23 20:22:22,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:22:22,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:22,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:22:22,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:22:22,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:22:23,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:22:23,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:22:23,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:22:23,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (1/1) ... [2019-11-23 20:22:23,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:22:23,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:22:23,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:22:23,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:22:23,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (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 [2019-11-23 20:22:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:22:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:22:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:22:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:22:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:22:23,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:22:23,467 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:22:23,468 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:22:23,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:23 BoogieIcfgContainer [2019-11-23 20:22:23,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:22:23,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:22:23,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:22:23,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:22:23,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:22:22" (1/3) ... [2019-11-23 20:22:23,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cb3981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:23, skipping insertion in model container [2019-11-23 20:22:23,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:22:22" (2/3) ... [2019-11-23 20:22:23,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cb3981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:22:23, skipping insertion in model container [2019-11-23 20:22:23,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:22:23" (3/3) ... [2019-11-23 20:22:23,479 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-1.i [2019-11-23 20:22:23,491 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:22:23,498 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:22:23,519 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:22:23,545 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:22:23,545 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:22:23,545 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:22:23,545 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:22:23,546 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:22:23,546 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:22:23,546 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:22:23,546 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:22:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:22:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:22:23,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:23,569 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:23,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:23,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2019-11-23 20:22:23,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:23,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644152355] [2019-11-23 20:22:23,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:23,765 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 20:22:23,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644152355] [2019-11-23 20:22:23,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:23,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:23,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295724488] [2019-11-23 20:22:23,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:23,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:23,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:23,796 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:22:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:23,854 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2019-11-23 20:22:23,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:23,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-23 20:22:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:23,870 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:22:23,870 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:22:23,877 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 20:22:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:22:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:22:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:22:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-11-23 20:22:23,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2019-11-23 20:22:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:23,936 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-11-23 20:22:23,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-11-23 20:22:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:22:23,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:23,939 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 20:22:23,940 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2019-11-23 20:22:23,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:23,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5790194] [2019-11-23 20:22:23,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:23,998 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 20:22:23,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5790194] [2019-11-23 20:22:23,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:22:24,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:22:24,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966227218] [2019-11-23 20:22:24,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:22:24,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:22:24,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:22:24,003 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 3 states. [2019-11-23 20:22:24,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:24,065 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-11-23 20:22:24,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:22:24,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:22:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:24,067 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:22:24,067 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:22:24,068 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 20:22:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:22:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-23 20:22:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:22:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-23 20:22:24,077 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2019-11-23 20:22:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:24,077 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-23 20:22:24,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:22:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-23 20:22:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:22:24,079 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:24,079 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 20:22:24,079 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2029995939, now seen corresponding path program 1 times [2019-11-23 20:22:24,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:24,081 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676720495] [2019-11-23 20:22:24,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:24,199 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 20:22:24,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676720495] [2019-11-23 20:22:24,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715740643] [2019-11-23 20:22:24,200 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 20:22:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:24,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:24,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:24,360 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 20:22:24,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:24,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:22:24,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554145144] [2019-11-23 20:22:24,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:22:24,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:24,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:22:24,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:22:24,363 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2019-11-23 20:22:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:24,402 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2019-11-23 20:22:24,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:22:24,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-23 20:22:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:24,404 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:22:24,405 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:22:24,405 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 20:22:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:22:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:22:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:22:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-23 20:22:24,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 25 [2019-11-23 20:22:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:24,418 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-23 20:22:24,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:22:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-23 20:22:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:22:24,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:24,420 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 20:22:24,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:24,625 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2073930139, now seen corresponding path program 2 times [2019-11-23 20:22:24,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:24,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197322918] [2019-11-23 20:22:24,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:24,743 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 20:22:24,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197322918] [2019-11-23 20:22:24,744 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35451335] [2019-11-23 20:22:24,745 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 20:22:24,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:24,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:24,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:22:24,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:24,850 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 20:22:24,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:24,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:22:24,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357447373] [2019-11-23 20:22:24,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:22:24,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:24,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:22:24,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:22:24,852 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 7 states. [2019-11-23 20:22:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:25,000 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-23 20:22:25,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:22:25,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-23 20:22:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:25,003 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:22:25,003 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 20:22:25,004 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 20:22:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 20:22:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2019-11-23 20:22:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:22:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-11-23 20:22:25,014 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 27 [2019-11-23 20:22:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:25,014 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-11-23 20:22:25,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:22:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-11-23 20:22:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:22:25,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:25,015 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 20:22:25,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:25,218 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:25,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:25,219 INFO L82 PathProgramCache]: Analyzing trace with hash 365526225, now seen corresponding path program 3 times [2019-11-23 20:22:25,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:25,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880726006] [2019-11-23 20:22:25,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:25,355 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 20:22:25,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880726006] [2019-11-23 20:22:25,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381577099] [2019-11-23 20:22:25,356 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 20:22:25,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:22:25,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:25,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:22:25,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:25,459 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 20:22:25,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:25,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:22:25,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497417877] [2019-11-23 20:22:25,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:22:25,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:22:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:22:25,461 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 9 states. [2019-11-23 20:22:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:25,599 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-11-23 20:22:25,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:22:25,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-23 20:22:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:25,601 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:22:25,601 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:22:25,602 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 20:22:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:22:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-11-23 20:22:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:22:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2019-11-23 20:22:25,610 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2019-11-23 20:22:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:25,610 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2019-11-23 20:22:25,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:22:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2019-11-23 20:22:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:22:25,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:25,612 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 20:22:25,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:25,815 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:25,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1465517191, now seen corresponding path program 4 times [2019-11-23 20:22:25,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:25,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394260004] [2019-11-23 20:22:25,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:25,910 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 20:22:25,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394260004] [2019-11-23 20:22:25,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145288534] [2019-11-23 20:22:25,912 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 20:22:25,965 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:25,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:25,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:22:25,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:26,020 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 20:22:26,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:26,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:22:26,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134669935] [2019-11-23 20:22:26,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:26,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:26,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:26,025 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 11 states. [2019-11-23 20:22:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:26,221 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2019-11-23 20:22:26,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:26,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-11-23 20:22:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:26,224 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:22:26,224 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:22:26,225 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 20:22:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:22:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2019-11-23 20:22:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:22:26,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2019-11-23 20:22:26,243 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 47 [2019-11-23 20:22:26,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:26,244 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2019-11-23 20:22:26,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:26,244 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2019-11-23 20:22:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:22:26,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:26,249 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 20:22:26,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:26,461 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:26,462 INFO L82 PathProgramCache]: Analyzing trace with hash -736124739, now seen corresponding path program 5 times [2019-11-23 20:22:26,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:26,462 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263362803] [2019-11-23 20:22:26,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:26,589 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 20:22:26,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263362803] [2019-11-23 20:22:26,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976096243] [2019-11-23 20:22:26,590 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 20:22:28,637 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:22:28,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:28,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:22:28,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:28,717 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 20:22:28,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:28,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-23 20:22:28,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851580243] [2019-11-23 20:22:28,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:22:28,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:28,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:22:28,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:22:28,719 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 13 states. [2019-11-23 20:22:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:28,892 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2019-11-23 20:22:28,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:22:28,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-11-23 20:22:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:28,894 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:22:28,894 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:22:28,895 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 20:22:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:22:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-11-23 20:22:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:22:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2019-11-23 20:22:28,903 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 57 [2019-11-23 20:22:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:28,903 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2019-11-23 20:22:28,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:22:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2019-11-23 20:22:28,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:22:28,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:28,905 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 20:22:29,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:29,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:29,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -319639181, now seen corresponding path program 6 times [2019-11-23 20:22:29,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:29,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026296345] [2019-11-23 20:22:29,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:29,293 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 20:22:29,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026296345] [2019-11-23 20:22:29,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642617492] [2019-11-23 20:22:29,295 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 20:22:29,768 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:22:29,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:29,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:22:29,776 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:29,847 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 20:22:29,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:29,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:22:29,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513049274] [2019-11-23 20:22:29,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:22:29,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:29,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:22:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:22:29,850 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 15 states. [2019-11-23 20:22:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:30,017 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2019-11-23 20:22:30,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:22:30,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-11-23 20:22:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:30,019 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:22:30,019 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:22:30,020 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 20:22:30,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:22:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2019-11-23 20:22:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:22:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2019-11-23 20:22:30,028 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 67 [2019-11-23 20:22:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:30,028 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2019-11-23 20:22:30,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:22:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2019-11-23 20:22:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:22:30,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:30,030 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 20:22:30,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:30,236 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1514957143, now seen corresponding path program 7 times [2019-11-23 20:22:30,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:30,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631890391] [2019-11-23 20:22:30,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:30,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:30,370 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 20:22:30,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631890391] [2019-11-23 20:22:30,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310073441] [2019-11-23 20:22:30,373 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 20:22:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:30,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:30,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:30,480 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 20:22:30,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:30,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:22:30,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499102908] [2019-11-23 20:22:30,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:22:30,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:30,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:22:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:22:30,486 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 11 states. [2019-11-23 20:22:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:30,523 INFO L93 Difference]: Finished difference Result 146 states and 156 transitions. [2019-11-23 20:22:30,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:22:30,524 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2019-11-23 20:22:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:30,525 INFO L225 Difference]: With dead ends: 146 [2019-11-23 20:22:30,525 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:22:30,527 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 20:22:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:22:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:22:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:22:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2019-11-23 20:22:30,541 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 77 [2019-11-23 20:22:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:30,541 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2019-11-23 20:22:30,541 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:22:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2019-11-23 20:22:30,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:22:30,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:30,546 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 20:22:30,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:30,751 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 966853863, now seen corresponding path program 8 times [2019-11-23 20:22:30,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:30,752 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187140663] [2019-11-23 20:22:30,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:30,869 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 20:22:30,869 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187140663] [2019-11-23 20:22:30,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578577077] [2019-11-23 20:22:30,870 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 20:22:30,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:22:30,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:30,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:22:30,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:30,963 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 20:22:30,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:30,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:22:30,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377279612] [2019-11-23 20:22:30,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:22:30,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:30,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:22:30,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:22:30,966 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 12 states. [2019-11-23 20:22:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:30,998 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2019-11-23 20:22:30,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:22:30,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2019-11-23 20:22:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:30,999 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:22:30,999 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:22:31,000 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 20:22:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:22:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 20:22:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:22:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2019-11-23 20:22:31,008 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 79 [2019-11-23 20:22:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:31,008 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2019-11-23 20:22:31,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:22:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2019-11-23 20:22:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:22:31,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:31,013 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 20:22:31,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:31,226 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:31,227 INFO L82 PathProgramCache]: Analyzing trace with hash -2014585947, now seen corresponding path program 9 times [2019-11-23 20:22:31,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:31,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371420254] [2019-11-23 20:22:31,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:31,357 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 20:22:31,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371420254] [2019-11-23 20:22:31,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011245064] [2019-11-23 20:22:31,358 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 20:22:33,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:22:33,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:33,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:22:33,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 20:22:33,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:33,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2019-11-23 20:22:33,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144384262] [2019-11-23 20:22:33,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:22:33,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:33,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:22:33,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:33,618 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 19 states. [2019-11-23 20:22:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:33,836 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2019-11-23 20:22:33,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:22:33,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-11-23 20:22:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:33,837 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:22:33,838 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:22:33,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:22:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:22:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2019-11-23 20:22:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:22:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2019-11-23 20:22:33,845 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 81 [2019-11-23 20:22:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:33,845 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2019-11-23 20:22:33,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:22:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2019-11-23 20:22:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:22:33,847 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:33,847 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:34,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:34,054 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:34,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:34,055 INFO L82 PathProgramCache]: Analyzing trace with hash -937563557, now seen corresponding path program 10 times [2019-11-23 20:22:34,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:34,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342426868] [2019-11-23 20:22:34,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:22:34,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342426868] [2019-11-23 20:22:34,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18018209] [2019-11-23 20:22:34,189 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 20:22:34,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:22:34,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:22:34,265 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:22:34,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:22:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:22:34,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:22:34,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-11-23 20:22:34,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085567271] [2019-11-23 20:22:34,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:22:34,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:22:34,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:22:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:34,419 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand 21 states. [2019-11-23 20:22:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:34,761 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2019-11-23 20:22:34,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:22:34,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2019-11-23 20:22:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:34,763 INFO L225 Difference]: With dead ends: 180 [2019-11-23 20:22:34,763 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:22:34,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:22:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:22:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2019-11-23 20:22:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:22:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2019-11-23 20:22:34,779 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 91 [2019-11-23 20:22:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:34,779 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2019-11-23 20:22:34,779 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:22:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2019-11-23 20:22:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:22:34,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:34,782 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 20:22:34,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:34,986 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:34,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:34,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1470647697, now seen corresponding path program 11 times [2019-11-23 20:22:34,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:34,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254203019] [2019-11-23 20:22:34,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:35,130 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 20:22:35,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254203019] [2019-11-23 20:22:35,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746227859] [2019-11-23 20:22:35,131 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