/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:43:34,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:43:34,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:43:34,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:43:34,418 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:43:34,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:43:34,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:43:34,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:43:34,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:43:34,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:43:34,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:43:34,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:43:34,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:43:34,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:43:34,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:43:34,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:43:34,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:43:34,433 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:43:34,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:43:34,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:43:34,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:43:34,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:43:34,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:43:34,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:43:34,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:43:34,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:43:34,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:43:34,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:43:34,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:43:34,466 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:43:34,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:43:34,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:43:34,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:43:34,468 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:43:34,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:43:34,469 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:43:34,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:43:34,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:43:34,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:43:34,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:43:34,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:43:34,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:43:34,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:43:34,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:43:34,470 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:43:34,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:43:34,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:43:34,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:43:34,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:43:34,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:43:34,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:43:34,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:43:34,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:43:34,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:43:34,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:43:34,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:43:34,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:43:34,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:43:34,730 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:43:34,745 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:43:34,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:43:34,752 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:43:34,752 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:43:34,754 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-11-06 18:43:34,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80dbbb74/e34bdd6bc92e4779ad5a48f78c2481e5/FLAG3b060ede8 [2019-11-06 18:43:35,231 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:43:35,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init1_ground-2.i [2019-11-06 18:43:35,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80dbbb74/e34bdd6bc92e4779ad5a48f78c2481e5/FLAG3b060ede8 [2019-11-06 18:43:35,640 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f80dbbb74/e34bdd6bc92e4779ad5a48f78c2481e5 [2019-11-06 18:43:35,650 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:43:35,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:43:35,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:43:35,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:43:35,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:43:35,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:35,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ccd342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35, skipping insertion in model container [2019-11-06 18:43:35,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:35,670 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:43:35,689 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:43:35,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:43:35,883 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:43:35,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:43:35,926 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:43:35,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35 WrapperNode [2019-11-06 18:43:35,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:43:35,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:43:35,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:43:35,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:43:36,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... [2019-11-06 18:43:36,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:43:36,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:43:36,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:43:36,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:43:36,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:43:36,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:43:36,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:43:36,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:43:36,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:43:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:43:36,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:43:36,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:43:36,370 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:43:36,370 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:43:36,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:43:36 BoogieIcfgContainer [2019-11-06 18:43:36,372 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:43:36,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:43:36,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:43:36,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:43:36,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:43:35" (1/3) ... [2019-11-06 18:43:36,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21519ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:43:36, skipping insertion in model container [2019-11-06 18:43:36,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:43:35" (2/3) ... [2019-11-06 18:43:36,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21519ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:43:36, skipping insertion in model container [2019-11-06 18:43:36,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:43:36" (3/3) ... [2019-11-06 18:43:36,394 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init1_ground-2.i [2019-11-06 18:43:36,407 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:43:36,414 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:43:36,434 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:43:36,461 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:43:36,462 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:43:36,462 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:43:36,462 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:43:36,462 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:43:36,462 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:43:36,462 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:43:36,462 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:43:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-06 18:43:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 18:43:36,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:36,484 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:36,486 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:36,491 INFO L82 PathProgramCache]: Analyzing trace with hash -441053002, now seen corresponding path program 1 times [2019-11-06 18:43:36,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:36,498 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333836079] [2019-11-06 18:43:36,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:36,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333836079] [2019-11-06 18:43:36,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:43:36,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:43:36,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126214142] [2019-11-06 18:43:36,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:43:36,674 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:43:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:43:36,689 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-06 18:43:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:36,776 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2019-11-06 18:43:36,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:43:36,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-06 18:43:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:36,786 INFO L225 Difference]: With dead ends: 39 [2019-11-06 18:43:36,786 INFO L226 Difference]: Without dead ends: 18 [2019-11-06 18:43:36,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:43:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-06 18:43:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-06 18:43:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-06 18:43:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-06 18:43:36,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-06 18:43:36,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:36,825 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-06 18:43:36,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:43:36,826 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-06 18:43:36,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 18:43:36,827 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:36,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:36,827 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:36,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 303899570, now seen corresponding path program 1 times [2019-11-06 18:43:36,828 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:36,829 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732430567] [2019-11-06 18:43:36,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:36,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732430567] [2019-11-06 18:43:36,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:43:36,934 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:43:36,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461166836] [2019-11-06 18:43:36,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:43:36,937 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:43:36,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:43:36,938 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2019-11-06 18:43:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:37,001 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-11-06 18:43:37,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:43:37,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-06 18:43:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:37,003 INFO L225 Difference]: With dead ends: 30 [2019-11-06 18:43:37,003 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:43:37,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:43:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:43:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:43:37,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:43:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-06 18:43:37,012 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 13 [2019-11-06 18:43:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:37,012 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-06 18:43:37,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:43:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-06 18:43:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-06 18:43:37,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:37,014 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:37,014 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1260126610, now seen corresponding path program 1 times [2019-11-06 18:43:37,015 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:37,015 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904441338] [2019-11-06 18:43:37,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:37,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904441338] [2019-11-06 18:43:37,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922920473] [2019-11-06 18:43:37,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:37,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:43:37,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:37,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:37,198 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:43:37,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15875087] [2019-11-06 18:43:37,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:43:37,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:37,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:43:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:37,200 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2019-11-06 18:43:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:37,266 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-06 18:43:37,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:43:37,267 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-06 18:43:37,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:37,268 INFO L225 Difference]: With dead ends: 31 [2019-11-06 18:43:37,268 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:43:37,270 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:43:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:43:37,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:43:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:43:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-06 18:43:37,279 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2019-11-06 18:43:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:37,279 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-06 18:43:37,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:43:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-06 18:43:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:43:37,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:37,281 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:37,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:37,485 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1794669362, now seen corresponding path program 2 times [2019-11-06 18:43:37,486 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:37,487 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720968659] [2019-11-06 18:43:37,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:37,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720968659] [2019-11-06 18:43:37,600 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482039954] [2019-11-06 18:43:37,600 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:37,655 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:37,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:37,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:43:37,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:37,676 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:37,677 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:43:37,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348867535] [2019-11-06 18:43:37,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:43:37,680 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:37,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:43:37,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:37,681 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2019-11-06 18:43:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:37,757 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2019-11-06 18:43:37,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:43:37,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-06 18:43:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:37,759 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:43:37,759 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 18:43:37,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:43:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 18:43:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 18:43:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:43:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-06 18:43:37,770 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2019-11-06 18:43:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:37,770 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-06 18:43:37,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:43:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-06 18:43:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:43:37,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:37,773 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:37,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:37,986 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:37,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2004063982, now seen corresponding path program 3 times [2019-11-06 18:43:37,989 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:37,990 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14307662] [2019-11-06 18:43:37,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:38,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14307662] [2019-11-06 18:43:38,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62968039] [2019-11-06 18:43:38,103 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:38,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:43:38,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:38,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:43:38,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:38,182 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:38,182 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:43:38,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436939446] [2019-11-06 18:43:38,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:43:38,183 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:38,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:43:38,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:38,185 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-11-06 18:43:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:38,241 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-06 18:43:38,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:43:38,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-06 18:43:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:38,244 INFO L225 Difference]: With dead ends: 33 [2019-11-06 18:43:38,244 INFO L226 Difference]: Without dead ends: 22 [2019-11-06 18:43:38,246 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:43:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-06 18:43:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-06 18:43:38,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-06 18:43:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2019-11-06 18:43:38,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2019-11-06 18:43:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:38,252 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2019-11-06 18:43:38,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:43:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2019-11-06 18:43:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:43:38,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:38,253 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:38,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:38,456 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -94637390, now seen corresponding path program 4 times [2019-11-06 18:43:38,458 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:38,458 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864936503] [2019-11-06 18:43:38,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:38,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864936503] [2019-11-06 18:43:38,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991010972] [2019-11-06 18:43:38,567 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:38,611 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:38,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:38,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:43:38,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:38,632 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:38,632 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:43:38,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984537313] [2019-11-06 18:43:38,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:43:38,633 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:38,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:43:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:38,634 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2019-11-06 18:43:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:38,710 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-06 18:43:38,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:43:38,710 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2019-11-06 18:43:38,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:38,711 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:43:38,711 INFO L226 Difference]: Without dead ends: 23 [2019-11-06 18:43:38,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:43:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-06 18:43:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-06 18:43:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-06 18:43:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-06 18:43:38,724 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2019-11-06 18:43:38,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:38,724 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-06 18:43:38,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:43:38,725 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-06 18:43:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 18:43:38,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:38,725 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:38,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:38,930 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:38,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:38,931 INFO L82 PathProgramCache]: Analyzing trace with hash -729870482, now seen corresponding path program 5 times [2019-11-06 18:43:38,931 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:38,931 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861197390] [2019-11-06 18:43:38,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:39,039 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861197390] [2019-11-06 18:43:39,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226085177] [2019-11-06 18:43:39,040 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:39,076 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:43:39,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:39,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:43:39,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:39,097 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:39,098 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:43:39,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113761539] [2019-11-06 18:43:39,098 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:43:39,099 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:43:39,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:39,099 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-11-06 18:43:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:39,175 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-06 18:43:39,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:43:39,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-06 18:43:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:39,176 INFO L225 Difference]: With dead ends: 35 [2019-11-06 18:43:39,176 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:43:39,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:43:39,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:43:39,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 18:43:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:43:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-11-06 18:43:39,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2019-11-06 18:43:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:39,185 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-11-06 18:43:39,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:43:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-11-06 18:43:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:43:39,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:39,187 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:39,389 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:39,390 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:39,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1052740146, now seen corresponding path program 6 times [2019-11-06 18:43:39,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:39,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711885728] [2019-11-06 18:43:39,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:39,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711885728] [2019-11-06 18:43:39,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862441989] [2019-11-06 18:43:39,515 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:39,549 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:43:39,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:39,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:43:39,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:39,571 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:39,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:43:39,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732868935] [2019-11-06 18:43:39,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:43:39,573 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:43:39,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:39,573 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2019-11-06 18:43:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:39,646 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2019-11-06 18:43:39,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:43:39,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-06 18:43:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:39,647 INFO L225 Difference]: With dead ends: 36 [2019-11-06 18:43:39,647 INFO L226 Difference]: Without dead ends: 25 [2019-11-06 18:43:39,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:43:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-06 18:43:39,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-06 18:43:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:43:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-11-06 18:43:39,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2019-11-06 18:43:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:39,653 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-11-06 18:43:39,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:43:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-11-06 18:43:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:43:39,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:39,654 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:39,858 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:39,859 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 479094766, now seen corresponding path program 7 times [2019-11-06 18:43:39,860 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:39,860 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173471453] [2019-11-06 18:43:39,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:40,005 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:40,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173471453] [2019-11-06 18:43:40,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325788827] [2019-11-06 18:43:40,006 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:40,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:43:40,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:40,070 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:40,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:43:40,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031185111] [2019-11-06 18:43:40,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:43:40,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:40,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:43:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:40,072 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states. [2019-11-06 18:43:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:40,169 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2019-11-06 18:43:40,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:43:40,170 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-06 18:43:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:40,170 INFO L225 Difference]: With dead ends: 37 [2019-11-06 18:43:40,170 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:43:40,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:43:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:43:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:43:40,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:43:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-06 18:43:40,177 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2019-11-06 18:43:40,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:40,179 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-06 18:43:40,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:43:40,179 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-06 18:43:40,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:43:40,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:40,180 INFO L410 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:40,384 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:40,384 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:40,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:40,385 INFO L82 PathProgramCache]: Analyzing trace with hash -124042830, now seen corresponding path program 8 times [2019-11-06 18:43:40,385 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:40,385 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459905061] [2019-11-06 18:43:40,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:40,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:40,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459905061] [2019-11-06 18:43:40,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128126955] [2019-11-06 18:43:40,487 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:40,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:40,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:40,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:43:40,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:40,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:40,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:43:40,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517642795] [2019-11-06 18:43:40,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:43:40,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:40,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:43:40,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:40,558 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2019-11-06 18:43:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:40,619 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-06 18:43:40,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:43:40,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2019-11-06 18:43:40,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:40,620 INFO L225 Difference]: With dead ends: 38 [2019-11-06 18:43:40,620 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:43:40,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:43:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:43:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 18:43:40,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:43:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-11-06 18:43:40,626 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2019-11-06 18:43:40,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:40,626 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-06 18:43:40,626 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:43:40,626 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-11-06 18:43:40,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:43:40,627 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:40,627 INFO L410 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:40,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:40,831 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:40,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:40,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1641439122, now seen corresponding path program 9 times [2019-11-06 18:43:40,832 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:40,832 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470409977] [2019-11-06 18:43:40,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:40,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:40,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470409977] [2019-11-06 18:43:40,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707668634] [2019-11-06 18:43:40,956 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:41,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:43:41,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:41,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:43:41,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:41,027 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:41,027 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:43:41,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847824682] [2019-11-06 18:43:41,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:43:41,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:43:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:43:41,028 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2019-11-06 18:43:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:41,097 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-06 18:43:41,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:43:41,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-11-06 18:43:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:41,100 INFO L225 Difference]: With dead ends: 39 [2019-11-06 18:43:41,100 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:43:41,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:43:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:43:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-06 18:43:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:43:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2019-11-06 18:43:41,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 22 [2019-11-06 18:43:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:41,106 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2019-11-06 18:43:41,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:43:41,106 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2019-11-06 18:43:41,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:43:41,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:41,107 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:41,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:41,314 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:41,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:41,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1436083918, now seen corresponding path program 10 times [2019-11-06 18:43:41,315 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:41,315 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158367548] [2019-11-06 18:43:41,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:41,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158367548] [2019-11-06 18:43:41,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038191375] [2019-11-06 18:43:41,436 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:41,472 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:41,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:41,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:43:41,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:41,493 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:41,493 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:43:41,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337721075] [2019-11-06 18:43:41,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:43:41,494 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:43:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:41,495 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2019-11-06 18:43:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:41,597 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2019-11-06 18:43:41,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:43:41,597 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-11-06 18:43:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:41,598 INFO L225 Difference]: With dead ends: 40 [2019-11-06 18:43:41,598 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:43:41,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:43:41,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:43:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-06 18:43:41,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:43:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-06 18:43:41,603 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 23 [2019-11-06 18:43:41,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:41,603 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-06 18:43:41,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:43:41,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-06 18:43:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:43:41,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:41,604 INFO L410 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:41,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:41,812 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash 634960110, now seen corresponding path program 11 times [2019-11-06 18:43:41,813 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:41,813 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681086489] [2019-11-06 18:43:41,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:41,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681086489] [2019-11-06 18:43:41,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897451808] [2019-11-06 18:43:41,964 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:42,027 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:43:42,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:42,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:43:42,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:42,055 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:42,055 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:43:42,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178741395] [2019-11-06 18:43:42,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:43:42,056 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:43:42,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:42,057 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 16 states. [2019-11-06 18:43:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:42,130 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2019-11-06 18:43:42,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:43:42,131 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2019-11-06 18:43:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:42,132 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:43:42,132 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:43:42,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:43:42,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-06 18:43:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-06 18:43:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-11-06 18:43:42,138 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 24 [2019-11-06 18:43:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:42,138 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-11-06 18:43:42,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:43:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-11-06 18:43:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:43:42,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:42,139 INFO L410 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:42,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:42,343 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash 412815538, now seen corresponding path program 12 times [2019-11-06 18:43:42,344 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:42,344 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499557894] [2019-11-06 18:43:42,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:42,491 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:42,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499557894] [2019-11-06 18:43:42,491 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168415739] [2019-11-06 18:43:42,492 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:42,553 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:43:42,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:42,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:43:42,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:42,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:42,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-06 18:43:42,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404036035] [2019-11-06 18:43:42,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:43:42,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:43:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:43:42,577 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2019-11-06 18:43:42,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:42,614 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-11-06 18:43:42,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:43:42,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 25 [2019-11-06 18:43:42,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:42,615 INFO L225 Difference]: With dead ends: 42 [2019-11-06 18:43:42,615 INFO L226 Difference]: Without dead ends: 31 [2019-11-06 18:43:42,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:43:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-06 18:43:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-06 18:43:42,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-06 18:43:42,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-06 18:43:42,620 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2019-11-06 18:43:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:42,621 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-06 18:43:42,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:43:42,621 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-06 18:43:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 18:43:42,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:42,622 INFO L410 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:42,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:42,829 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:42,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:42,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2116268398, now seen corresponding path program 13 times [2019-11-06 18:43:42,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:42,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397405106] [2019-11-06 18:43:42,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:42,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397405106] [2019-11-06 18:43:43,009 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699329587] [2019-11-06 18:43:43,009 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:43,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:43:43,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:43,089 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:43,089 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:43:43,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390099708] [2019-11-06 18:43:43,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:43:43,090 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:43:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:43:43,091 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 18 states. [2019-11-06 18:43:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:43,199 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2019-11-06 18:43:43,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:43:43,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2019-11-06 18:43:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:43,201 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:43:43,201 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:43:43,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:43:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:43:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 18:43:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:43:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-06 18:43:43,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2019-11-06 18:43:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:43,215 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-06 18:43:43,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:43:43,218 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-06 18:43:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:43:43,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:43,219 INFO L410 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:43,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:43,420 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash -911267790, now seen corresponding path program 14 times [2019-11-06 18:43:43,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:43,420 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909439832] [2019-11-06 18:43:43,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:43,590 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909439832] [2019-11-06 18:43:43,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502103342] [2019-11-06 18:43:43,591 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:43,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:43,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:43,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:43:43,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:43,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:43,668 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:43:43,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260837771] [2019-11-06 18:43:43,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:43:43,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:43,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:43:43,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:43:43,671 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 19 states. [2019-11-06 18:43:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:43,775 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-11-06 18:43:43,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:43:43,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 27 [2019-11-06 18:43:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:43,776 INFO L225 Difference]: With dead ends: 44 [2019-11-06 18:43:43,776 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:43:43,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:43:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:43:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-06 18:43:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:43:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-06 18:43:43,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2019-11-06 18:43:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:43,786 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-06 18:43:43,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:43:43,787 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-06 18:43:43,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-06 18:43:43,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:43,787 INFO L410 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:43,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:43,992 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash -275609106, now seen corresponding path program 15 times [2019-11-06 18:43:43,993 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:43,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828201981] [2019-11-06 18:43:43,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:44,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828201981] [2019-11-06 18:43:44,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149612400] [2019-11-06 18:43:44,188 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:44,265 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:43:44,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:44,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:43:44,268 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:44,297 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:44,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:43:44,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380498400] [2019-11-06 18:43:44,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:43:44,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:44,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:43:44,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:43:44,299 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 20 states. [2019-11-06 18:43:44,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:44,405 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2019-11-06 18:43:44,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:43:44,405 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-11-06 18:43:44,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:44,406 INFO L225 Difference]: With dead ends: 45 [2019-11-06 18:43:44,406 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:43:44,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:43:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:43:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-11-06 18:43:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:43:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2019-11-06 18:43:44,411 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 28 [2019-11-06 18:43:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:44,412 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2019-11-06 18:43:44,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:43:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2019-11-06 18:43:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:43:44,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:44,413 INFO L410 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:44,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:44,617 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2045026382, now seen corresponding path program 16 times [2019-11-06 18:43:44,618 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:44,618 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712340703] [2019-11-06 18:43:44,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:44,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:44,897 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712340703] [2019-11-06 18:43:44,898 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449952692] [2019-11-06 18:43:44,899 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:44,978 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:44,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:44,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:43:44,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:45,014 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:45,015 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:43:45,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62730317] [2019-11-06 18:43:45,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:43:45,016 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:45,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:43:45,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:43:45,017 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 21 states. [2019-11-06 18:43:45,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:45,162 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-11-06 18:43:45,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:43:45,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 29 [2019-11-06 18:43:45,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:45,164 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:43:45,164 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:43:45,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:43:45,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:43:45,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-06 18:43:45,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:43:45,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-06 18:43:45,173 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 29 [2019-11-06 18:43:45,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:45,173 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-06 18:43:45,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:43:45,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-06 18:43:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 18:43:45,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:45,181 INFO L410 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:45,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:45,387 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:45,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1062387090, now seen corresponding path program 17 times [2019-11-06 18:43:45,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:45,387 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750997428] [2019-11-06 18:43:45,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:45,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750997428] [2019-11-06 18:43:45,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091336811] [2019-11-06 18:43:45,591 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:45,688 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-06 18:43:45,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:45,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:43:45,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:45,715 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:45,715 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-06 18:43:45,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063364993] [2019-11-06 18:43:45,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:43:45,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:45,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:43:45,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:43:45,717 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 22 states. [2019-11-06 18:43:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:45,815 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-06 18:43:45,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:43:45,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-11-06 18:43:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:45,816 INFO L225 Difference]: With dead ends: 47 [2019-11-06 18:43:45,816 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:43:45,817 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:43:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:43:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-06 18:43:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 18:43:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-11-06 18:43:45,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2019-11-06 18:43:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:45,821 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-11-06 18:43:45,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:43:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-11-06 18:43:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:43:45,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:45,822 INFO L410 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:46,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:46,027 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -665340110, now seen corresponding path program 18 times [2019-11-06 18:43:46,028 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:46,028 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389033161] [2019-11-06 18:43:46,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:46,280 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389033161] [2019-11-06 18:43:46,281 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395840113] [2019-11-06 18:43:46,281 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:46,449 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-06 18:43:46,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:46,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:43:46,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:46,467 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:46,467 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-11-06 18:43:46,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843135657] [2019-11-06 18:43:46,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 18:43:46,468 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:46,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 18:43:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:43:46,469 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 23 states. [2019-11-06 18:43:46,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:46,574 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-11-06 18:43:46,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:43:46,575 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 31 [2019-11-06 18:43:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:46,575 INFO L225 Difference]: With dead ends: 48 [2019-11-06 18:43:46,575 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:43:46,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:43:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:43:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-06 18:43:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:43:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-06 18:43:46,580 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-11-06 18:43:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:46,580 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-06 18:43:46,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 18:43:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-06 18:43:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:43:46,581 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:46,581 INFO L410 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:46,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:46,785 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1241785618, now seen corresponding path program 19 times [2019-11-06 18:43:46,786 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:46,786 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026871750] [2019-11-06 18:43:46,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:47,022 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026871750] [2019-11-06 18:43:47,023 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716716254] [2019-11-06 18:43:47,023 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:43:47,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:47,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:47,094 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:43:47,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162356057] [2019-11-06 18:43:47,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:43:47,095 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:43:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:43:47,096 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 24 states. [2019-11-06 18:43:47,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:47,187 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2019-11-06 18:43:47,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:43:47,188 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2019-11-06 18:43:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:47,189 INFO L225 Difference]: With dead ends: 49 [2019-11-06 18:43:47,189 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:43:47,189 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:43:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:43:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-06 18:43:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 18:43:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-06 18:43:47,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2019-11-06 18:43:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:47,193 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-06 18:43:47,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:43:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-06 18:43:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:43:47,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:47,194 INFO L410 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:47,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:47,398 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:47,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:47,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1931727182, now seen corresponding path program 20 times [2019-11-06 18:43:47,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:47,399 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995818417] [2019-11-06 18:43:47,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:47,680 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:47,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995818417] [2019-11-06 18:43:47,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321746235] [2019-11-06 18:43:47,681 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:47,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:47,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:47,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:43:47,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:47,783 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:47,783 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:43:47,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778233147] [2019-11-06 18:43:47,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:43:47,784 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:43:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:43:47,784 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 25 states. [2019-11-06 18:43:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:47,899 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2019-11-06 18:43:47,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:43:47,901 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 33 [2019-11-06 18:43:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:47,902 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:43:47,902 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:43:47,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:43:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:43:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-06 18:43:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:43:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-11-06 18:43:47,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2019-11-06 18:43:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:47,906 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-11-06 18:43:47,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:43:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-11-06 18:43:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:43:47,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:47,907 INFO L410 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:48,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:48,110 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1845079186, now seen corresponding path program 21 times [2019-11-06 18:43:48,111 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:48,111 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839496809] [2019-11-06 18:43:48,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:48,403 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839496809] [2019-11-06 18:43:48,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274351876] [2019-11-06 18:43:48,404 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:48,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-06 18:43:48,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:48,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:43:48,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:48,762 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:48,762 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-11-06 18:43:48,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092123165] [2019-11-06 18:43:48,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:43:48,763 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:43:48,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:43:48,764 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 26 states. [2019-11-06 18:43:48,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:48,870 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-11-06 18:43:48,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:43:48,871 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-11-06 18:43:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:48,872 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:43:48,872 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:43:48,873 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:43:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:43:48,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:43:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:43:48,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-06 18:43:48,877 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2019-11-06 18:43:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:48,877 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-06 18:43:48,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:43:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-06 18:43:48,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:43:48,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:48,878 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:49,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,083 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:49,083 INFO L82 PathProgramCache]: Analyzing trace with hash 841008690, now seen corresponding path program 22 times [2019-11-06 18:43:49,084 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:49,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609916033] [2019-11-06 18:43:49,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:49,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609916033] [2019-11-06 18:43:49,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752380496] [2019-11-06 18:43:49,363 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,414 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:49,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:49,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:43:49,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:49,442 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:49,443 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:43:49,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084741757] [2019-11-06 18:43:49,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:43:49,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:43:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:43:49,444 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 27 states. [2019-11-06 18:43:49,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:49,572 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-06 18:43:49,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:43:49,572 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 35 [2019-11-06 18:43:49,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:49,573 INFO L225 Difference]: With dead ends: 52 [2019-11-06 18:43:49,573 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:43:49,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:43:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:43:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-06 18:43:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:43:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-06 18:43:49,578 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2019-11-06 18:43:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:49,578 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-06 18:43:49,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:43:49,578 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-06 18:43:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-06 18:43:49,579 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:49,579 INFO L410 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:49,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:49,780 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1789613074, now seen corresponding path program 23 times [2019-11-06 18:43:49,781 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:49,781 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187374352] [2019-11-06 18:43:49,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:50,122 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187374352] [2019-11-06 18:43:50,123 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713269758] [2019-11-06 18:43:50,123 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:50,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-06 18:43:50,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:50,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:43:50,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:50,366 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:50,366 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-06 18:43:50,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451765185] [2019-11-06 18:43:50,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:43:50,367 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:43:50,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:43:50,368 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 28 states. [2019-11-06 18:43:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:50,455 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2019-11-06 18:43:50,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:43:50,456 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 36 [2019-11-06 18:43:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:50,457 INFO L225 Difference]: With dead ends: 53 [2019-11-06 18:43:50,457 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:43:50,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:43:50,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:43:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-11-06 18:43:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:43:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-06 18:43:50,462 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 36 [2019-11-06 18:43:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:50,462 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-06 18:43:50,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:43:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-06 18:43:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:43:50,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:50,464 INFO L410 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:50,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:50,669 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1734509134, now seen corresponding path program 24 times [2019-11-06 18:43:50,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:50,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038306575] [2019-11-06 18:43:50,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:51,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038306575] [2019-11-06 18:43:51,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255111548] [2019-11-06 18:43:51,044 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:52,155 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:43:52,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:52,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 18:43:52,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:52,173 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:52,173 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-11-06 18:43:52,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559044596] [2019-11-06 18:43:52,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 18:43:52,174 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 18:43:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:43:52,175 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 29 states. [2019-11-06 18:43:52,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:52,305 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-06 18:43:52,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:43:52,306 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2019-11-06 18:43:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:52,306 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:43:52,307 INFO L226 Difference]: Without dead ends: 43 [2019-11-06 18:43:52,307 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:43:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-06 18:43:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-06 18:43:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 18:43:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2019-11-06 18:43:52,311 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 37 [2019-11-06 18:43:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:52,311 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2019-11-06 18:43:52,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 18:43:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2019-11-06 18:43:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:43:52,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:52,312 INFO L410 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:52,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:52,517 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:52,518 INFO L82 PathProgramCache]: Analyzing trace with hash -26286994, now seen corresponding path program 25 times [2019-11-06 18:43:52,519 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:52,519 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386355463] [2019-11-06 18:43:52,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:52,847 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386355463] [2019-11-06 18:43:52,847 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587690474] [2019-11-06 18:43:52,847 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:52,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:43:52,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:52,918 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:52,918 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:43:52,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762905715] [2019-11-06 18:43:52,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:43:52,918 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:52,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:43:52,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:43:52,919 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2019-11-06 18:43:53,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:53,078 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2019-11-06 18:43:53,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:43:53,078 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2019-11-06 18:43:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:53,079 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:43:53,079 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:43:53,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:43:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:43:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-06 18:43:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 18:43:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-06 18:43:53,083 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 38 [2019-11-06 18:43:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:53,083 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-06 18:43:53,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:43:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-06 18:43:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:43:53,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:53,084 INFO L410 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:53,286 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:53,286 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:53,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:53,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1388991794, now seen corresponding path program 26 times [2019-11-06 18:43:53,287 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:53,287 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313074727] [2019-11-06 18:43:53,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:53,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313074727] [2019-11-06 18:43:53,829 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289071310] [2019-11-06 18:43:53,829 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:53,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:53,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:53,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:43:53,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:53,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:53,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:43:53,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983226157] [2019-11-06 18:43:53,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:43:53,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:53,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:43:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:43:53,984 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 31 states. [2019-11-06 18:43:54,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:54,181 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2019-11-06 18:43:54,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:43:54,182 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 39 [2019-11-06 18:43:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:54,183 INFO L225 Difference]: With dead ends: 56 [2019-11-06 18:43:54,183 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 18:43:54,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:43:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 18:43:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-06 18:43:54,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:43:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-11-06 18:43:54,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 39 [2019-11-06 18:43:54,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:54,191 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-11-06 18:43:54,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:43:54,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-11-06 18:43:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:43:54,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:54,192 INFO L410 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:54,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:54,397 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1982006034, now seen corresponding path program 27 times [2019-11-06 18:43:54,398 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:54,398 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953933184] [2019-11-06 18:43:54,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:54,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953933184] [2019-11-06 18:43:54,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514019791] [2019-11-06 18:43:54,778 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:55,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-06 18:43:55,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:55,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:43:55,844 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:55,875 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:55,875 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-11-06 18:43:55,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069622279] [2019-11-06 18:43:55,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:43:55,878 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:55,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:43:55,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:43:55,884 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 32 states. [2019-11-06 18:43:56,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:56,032 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-11-06 18:43:56,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:43:56,032 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2019-11-06 18:43:56,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:56,033 INFO L225 Difference]: With dead ends: 57 [2019-11-06 18:43:56,033 INFO L226 Difference]: Without dead ends: 46 [2019-11-06 18:43:56,034 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:43:56,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-06 18:43:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-11-06 18:43:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:43:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-06 18:43:56,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2019-11-06 18:43:56,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:56,039 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-06 18:43:56,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:43:56,039 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-06 18:43:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:43:56,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:56,040 INFO L410 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:56,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:56,247 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:56,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:56,247 INFO L82 PathProgramCache]: Analyzing trace with hash 891243698, now seen corresponding path program 28 times [2019-11-06 18:43:56,248 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:56,248 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742837444] [2019-11-06 18:43:56,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:56,646 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742837444] [2019-11-06 18:43:56,647 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681303458] [2019-11-06 18:43:56,647 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:56,714 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:56,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:56,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:43:56,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:56,734 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:56,734 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-11-06 18:43:56,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754321766] [2019-11-06 18:43:56,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:43:56,736 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:56,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:43:56,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:43:56,738 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 33 states. [2019-11-06 18:43:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:56,883 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-06 18:43:56,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:43:56,883 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 41 [2019-11-06 18:43:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:56,884 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:43:56,884 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:43:56,886 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:43:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:43:56,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-06 18:43:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:43:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-06 18:43:56,888 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2019-11-06 18:43:56,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:56,889 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-06 18:43:56,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 18:43:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-06 18:43:56,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:43:56,889 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:56,889 INFO L410 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:57,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:57,093 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -232327826, now seen corresponding path program 29 times [2019-11-06 18:43:57,094 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:57,094 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117989074] [2019-11-06 18:43:57,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:57,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117989074] [2019-11-06 18:43:57,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187468853] [2019-11-06 18:43:57,502 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:58,317 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-06 18:43:58,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:58,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:43:58,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:58,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:58,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-11-06 18:43:58,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183280132] [2019-11-06 18:43:58,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 18:43:58,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:58,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 18:43:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:43:58,336 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 34 states. [2019-11-06 18:43:58,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:58,410 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2019-11-06 18:43:58,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:43:58,410 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 42 [2019-11-06 18:43:58,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:58,411 INFO L225 Difference]: With dead ends: 59 [2019-11-06 18:43:58,411 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:43:58,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:43:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:43:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-06 18:43:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:43:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-06 18:43:58,415 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2019-11-06 18:43:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:58,416 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-06 18:43:58,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 18:43:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-06 18:43:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:43:58,416 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:58,416 INFO L410 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:58,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:58,622 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:58,623 INFO L82 PathProgramCache]: Analyzing trace with hash -703306702, now seen corresponding path program 30 times [2019-11-06 18:43:58,623 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:58,623 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513230780] [2019-11-06 18:43:58,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:43:59,040 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513230780] [2019-11-06 18:43:59,041 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795348411] [2019-11-06 18:43:59,041 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:02,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-06 18:44:02,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:02,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 18:44:02,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:02,123 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:02,123 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-11-06 18:44:02,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200675025] [2019-11-06 18:44:02,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:44:02,124 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:02,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:44:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:44:02,125 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 35 states. [2019-11-06 18:44:02,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:02,343 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-11-06 18:44:02,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 18:44:02,343 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 43 [2019-11-06 18:44:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:02,344 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:44:02,344 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:44:02,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:44:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:44:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-06 18:44:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:44:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2019-11-06 18:44:02,349 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2019-11-06 18:44:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:02,349 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2019-11-06 18:44:02,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:44:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2019-11-06 18:44:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 18:44:02,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:02,350 INFO L410 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:02,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:02,554 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:02,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:02,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1876217326, now seen corresponding path program 31 times [2019-11-06 18:44:02,555 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:02,555 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636717522] [2019-11-06 18:44:02,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:03,158 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:03,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636717522] [2019-11-06 18:44:03,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001243834] [2019-11-06 18:44:03,159 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:03,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-06 18:44:03,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:03,251 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:03,251 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-11-06 18:44:03,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797676622] [2019-11-06 18:44:03,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:44:03,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:44:03,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:44:03,253 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 36 states. [2019-11-06 18:44:03,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:03,315 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2019-11-06 18:44:03,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:44:03,315 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 44 [2019-11-06 18:44:03,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:03,316 INFO L225 Difference]: With dead ends: 61 [2019-11-06 18:44:03,316 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:44:03,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:44:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:44:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-06 18:44:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-06 18:44:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-06 18:44:03,321 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 44 [2019-11-06 18:44:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:03,321 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-06 18:44:03,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:44:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-06 18:44:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:44:03,321 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:03,322 INFO L410 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:03,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:03,523 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:03,524 INFO L82 PathProgramCache]: Analyzing trace with hash 237083570, now seen corresponding path program 32 times [2019-11-06 18:44:03,524 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:03,524 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664034826] [2019-11-06 18:44:03,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:04,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664034826] [2019-11-06 18:44:04,003 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471930952] [2019-11-06 18:44:04,003 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:04,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:04,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:04,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-06 18:44:04,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:04,085 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:04,085 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-11-06 18:44:04,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686153934] [2019-11-06 18:44:04,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 18:44:04,086 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:04,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 18:44:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:44:04,087 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 37 states. [2019-11-06 18:44:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:04,271 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-11-06 18:44:04,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:44:04,271 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 45 [2019-11-06 18:44:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:04,272 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:44:04,272 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:44:04,273 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:44:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:44:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-06 18:44:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:44:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-11-06 18:44:04,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 45 [2019-11-06 18:44:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:04,277 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-11-06 18:44:04,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-06 18:44:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-11-06 18:44:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-06 18:44:04,278 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:04,278 INFO L410 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:04,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:04,482 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:04,482 INFO L82 PathProgramCache]: Analyzing trace with hash 963544686, now seen corresponding path program 33 times [2019-11-06 18:44:04,483 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:04,483 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78288360] [2019-11-06 18:44:04,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:04,972 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78288360] [2019-11-06 18:44:04,972 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867521789] [2019-11-06 18:44:04,972 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:08,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-06 18:44:08,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:08,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 18:44:08,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:08,795 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:08,795 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-11-06 18:44:08,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64941274] [2019-11-06 18:44:08,796 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:44:08,796 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:08,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:44:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:44:08,797 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2019-11-06 18:44:08,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:08,965 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2019-11-06 18:44:08,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-06 18:44:08,966 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 46 [2019-11-06 18:44:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:08,967 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:44:08,967 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:44:08,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:44:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:44:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-11-06 18:44:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:44:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-11-06 18:44:08,971 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46 [2019-11-06 18:44:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:08,971 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-11-06 18:44:08,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:44:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-11-06 18:44:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:44:08,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:08,971 INFO L410 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:09,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:09,172 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2009002802, now seen corresponding path program 34 times [2019-11-06 18:44:09,173 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:09,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852756848] [2019-11-06 18:44:09,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:09,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852756848] [2019-11-06 18:44:09,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443360630] [2019-11-06 18:44:09,778 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:09,857 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:44:09,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:09,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-06 18:44:09,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:09,871 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:09,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-11-06 18:44:09,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967101996] [2019-11-06 18:44:09,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 18:44:09,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:09,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 18:44:09,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:44:09,873 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 39 states. [2019-11-06 18:44:10,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:10,055 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2019-11-06 18:44:10,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 18:44:10,056 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 47 [2019-11-06 18:44:10,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:10,057 INFO L225 Difference]: With dead ends: 64 [2019-11-06 18:44:10,057 INFO L226 Difference]: Without dead ends: 53 [2019-11-06 18:44:10,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:44:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-06 18:44:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-06 18:44:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:44:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-06 18:44:10,061 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 47 [2019-11-06 18:44:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:10,061 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-06 18:44:10,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 18:44:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-06 18:44:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-06 18:44:10,062 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:10,062 INFO L410 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:10,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:10,266 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash 58466030, now seen corresponding path program 35 times [2019-11-06 18:44:10,267 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:10,267 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283610467] [2019-11-06 18:44:10,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:10,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283610467] [2019-11-06 18:44:10,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766542655] [2019-11-06 18:44:10,815 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:11,391 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-06 18:44:11,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:11,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-06 18:44:11,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:11,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:11,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2019-11-06 18:44:11,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924478622] [2019-11-06 18:44:11,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:44:11,432 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:11,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:44:11,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:44:11,433 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 40 states. [2019-11-06 18:44:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:11,590 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2019-11-06 18:44:11,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-06 18:44:11,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 48 [2019-11-06 18:44:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:11,591 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:44:11,592 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:44:11,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:44:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:44:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-11-06 18:44:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 18:44:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-11-06 18:44:11,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 48 [2019-11-06 18:44:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:11,596 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-11-06 18:44:11,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:44:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-11-06 18:44:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:44:11,597 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:11,597 INFO L410 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:11,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:11,802 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:11,802 INFO L82 PathProgramCache]: Analyzing trace with hash -278631758, now seen corresponding path program 36 times [2019-11-06 18:44:11,803 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:11,803 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081683560] [2019-11-06 18:44:11,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:12,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081683560] [2019-11-06 18:44:12,405 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656177692] [2019-11-06 18:44:12,405 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:22,039 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 18:44:22,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:22,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-06 18:44:22,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:22,067 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:22,067 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2019-11-06 18:44:22,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897852666] [2019-11-06 18:44:22,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-06 18:44:22,068 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:22,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-06 18:44:22,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:44:22,069 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 41 states. [2019-11-06 18:44:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:22,290 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2019-11-06 18:44:22,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:44:22,291 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 49 [2019-11-06 18:44:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:22,292 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:44:22,292 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:44:22,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2019-11-06 18:44:22,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:44:22,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-06 18:44:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:44:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2019-11-06 18:44:22,295 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2019-11-06 18:44:22,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:22,296 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2019-11-06 18:44:22,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-06 18:44:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2019-11-06 18:44:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:44:22,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:22,297 INFO L410 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:22,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:22,507 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash -2138728594, now seen corresponding path program 37 times [2019-11-06 18:44:22,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:22,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34607734] [2019-11-06 18:44:22,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:23,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34607734] [2019-11-06 18:44:23,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330683940] [2019-11-06 18:44:23,152 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:23,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-06 18:44:23,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:23,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:23,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2019-11-06 18:44:23,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563846755] [2019-11-06 18:44:23,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:44:23,260 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:44:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:44:23,261 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 42 states. [2019-11-06 18:44:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:23,465 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2019-11-06 18:44:23,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-06 18:44:23,466 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 50 [2019-11-06 18:44:23,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:23,467 INFO L225 Difference]: With dead ends: 67 [2019-11-06 18:44:23,467 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:44:23,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:44:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:44:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-06 18:44:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:44:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-06 18:44:23,471 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2019-11-06 18:44:23,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:23,472 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-06 18:44:23,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:44:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-06 18:44:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:44:23,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:23,472 INFO L410 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:23,675 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:23,676 INFO L410 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash 327811634, now seen corresponding path program 38 times [2019-11-06 18:44:23,677 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:23,677 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26790924] [2019-11-06 18:44:23,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:24,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26790924] [2019-11-06 18:44:24,381 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988265907] [2019-11-06 18:44:24,381 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:24,491 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:44:24,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:44:24,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-06 18:44:24,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:44:24,509 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:24,509 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2019-11-06 18:44:24,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713365816] [2019-11-06 18:44:24,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-06 18:44:24,510 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-06 18:44:24,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:44:24,511 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 43 states. [2019-11-06 18:44:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:24,673 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2019-11-06 18:44:24,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:44:24,674 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 51 [2019-11-06 18:44:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:24,674 INFO L225 Difference]: With dead ends: 68 [2019-11-06 18:44:24,674 INFO L226 Difference]: Without dead ends: 57 [2019-11-06 18:44:24,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:44:24,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-06 18:44:24,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-06 18:44:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:44:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-11-06 18:44:24,677 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 51 [2019-11-06 18:44:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:24,677 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-11-06 18:44:24,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-06 18:44:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-11-06 18:44:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:44:24,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:24,678 INFO L410 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:24,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:24,882 INFO L410 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash -518852626, now seen corresponding path program 39 times [2019-11-06 18:44:24,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:24,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118294066] [2019-11-06 18:44:24,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat