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-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:50:05,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:50:05,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:50:05,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 10:50:05,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:50:05,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:50:05,419 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:50:05,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:50:05,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:50:05,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:50:05,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:50:05,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:50:05,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:50:05,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:50:05,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:50:05,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:50:05,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:50:05,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:50:05,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:50:05,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:50:05,442 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 [2019-09-07 10:50:05,456 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:50:05,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:50:05,459 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:50:05,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:50:05,459 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:50:05,460 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:50:05,460 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:50:05,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:50:05,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:50:05,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:50:05,461 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:50:05,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:50:05,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:50:05,462 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:50:05,462 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:50:05,462 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:50:05,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:50:05,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:50:05,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:50:05,463 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:50:05,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:50:05,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:50:05,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:50:05,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:50:05,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:50:05,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:50:05,465 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:50:05,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:50:05,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:50:05,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:50:05,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:50:05,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:50:05,525 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:50:05,525 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:50:05,526 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i [2019-09-07 10:50:05,587 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81e8c447d/3bebf03dcca64aa1866dc3bb30f4ed63/FLAG67a324e7c [2019-09-07 10:50:06,025 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:50:06,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i [2019-09-07 10:50:06,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81e8c447d/3bebf03dcca64aa1866dc3bb30f4ed63/FLAG67a324e7c [2019-09-07 10:50:06,430 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81e8c447d/3bebf03dcca64aa1866dc3bb30f4ed63 [2019-09-07 10:50:06,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:50:06,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:50:06,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:50:06,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:50:06,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:50:06,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:50:06" (1/1) ... [2019-09-07 10:50:06,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1699d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:06, skipping insertion in model container [2019-09-07 10:50:06,451 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:50:06" (1/1) ... [2019-09-07 10:50:06,458 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:50:06,472 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:50:06,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:50:09,230 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:50:09,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:50:09,280 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:50:09,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09 WrapperNode [2019-09-07 10:50:09,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:50:09,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:50:09,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:50:09,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:50:09,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (1/1) ... [2019-09-07 10:50:09,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:50:09,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:50:09,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:50:09,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:50:09,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (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 [2019-09-07 10:50:09,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:50:09,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:50:09,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:50:09,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:50:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:50:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 10:50:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:50:09,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:50:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:50:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:50:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:50:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:50:09,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-07 10:50:09,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:50:09,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:50:09,718 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:50:09,718 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-07 10:50:09,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:50:09 BoogieIcfgContainer [2019-09-07 10:50:09,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:50:09,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:50:09,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:50:09,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:50:09,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:50:06" (1/3) ... [2019-09-07 10:50:09,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2f3b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:50:09, skipping insertion in model container [2019-09-07 10:50:09,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:50:09" (2/3) ... [2019-09-07 10:50:09,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2f3b15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:50:09, skipping insertion in model container [2019-09-07 10:50:09,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:50:09" (3/3) ... [2019-09-07 10:50:09,739 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2019-09-07 10:50:09,747 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:50:09,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:50:09,772 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:50:09,804 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:50:09,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:50:09,805 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:50:09,805 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:50:09,806 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:50:09,806 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:50:09,806 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:50:09,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:50:09,806 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:50:09,825 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-09-07 10:50:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 10:50:09,832 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:09,833 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:09,836 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:09,842 INFO L82 PathProgramCache]: Analyzing trace with hash 198312087, now seen corresponding path program 1 times [2019-09-07 10:50:09,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:09,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:09,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:09,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:09,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:09,993 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:50:09,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:50:09,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:50:10,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:50:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:50:10,013 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-09-07 10:50:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:10,036 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2019-09-07 10:50:10,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:50:10,038 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-07 10:50:10,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:10,046 INFO L225 Difference]: With dead ends: 46 [2019-09-07 10:50:10,046 INFO L226 Difference]: Without dead ends: 23 [2019-09-07 10:50:10,049 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:50:10,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-07 10:50:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-07 10:50:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-07 10:50:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-07 10:50:10,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2019-09-07 10:50:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:10,087 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-07 10:50:10,087 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:50:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-07 10:50:10,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 10:50:10,088 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:10,089 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:10,089 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2074583670, now seen corresponding path program 1 times [2019-09-07 10:50:10,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:10,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:10,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:10,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:10,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:50:10,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:50:10,158 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:50:10,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:50:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:50:10,159 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 3 states. [2019-09-07 10:50:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:10,215 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-09-07 10:50:10,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:50:10,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-07 10:50:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:10,218 INFO L225 Difference]: With dead ends: 46 [2019-09-07 10:50:10,218 INFO L226 Difference]: Without dead ends: 33 [2019-09-07 10:50:10,219 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:50:10,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-07 10:50:10,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-09-07 10:50:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-07 10:50:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-09-07 10:50:10,229 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2019-09-07 10:50:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:10,229 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-09-07 10:50:10,229 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:50:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-09-07 10:50:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 10:50:10,230 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:10,231 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:10,231 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash -84436795, now seen corresponding path program 1 times [2019-09-07 10:50:10,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:10,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:10,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:10,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:10,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:10,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:10,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:10,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:50:10,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:10,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:10,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 10:50:10,443 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:50:10,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:50:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:50:10,444 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2019-09-07 10:50:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:10,504 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-09-07 10:50:10,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:50:10,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-07 10:50:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:10,506 INFO L225 Difference]: With dead ends: 56 [2019-09-07 10:50:10,506 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 10:50:10,507 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:50:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 10:50:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2019-09-07 10:50:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 10:50:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-07 10:50:10,513 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 19 [2019-09-07 10:50:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:10,513 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-07 10:50:10,514 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:50:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-07 10:50:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 10:50:10,515 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:10,515 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:10,515 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:10,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1287700096, now seen corresponding path program 2 times [2019-09-07 10:50:10,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:10,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:10,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:10,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:10,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:10,639 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:10,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:50:10,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:50:10,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:10,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:50:10,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:10,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:10,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 10:50:10,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:50:10,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:50:10,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:50:10,739 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 6 states. [2019-09-07 10:50:10,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:10,822 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-09-07 10:50:10,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:50:10,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-09-07 10:50:10,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:10,826 INFO L225 Difference]: With dead ends: 66 [2019-09-07 10:50:10,826 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 10:50:10,827 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:50:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 10:50:10,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2019-09-07 10:50:10,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-07 10:50:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-09-07 10:50:10,837 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2019-09-07 10:50:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:10,838 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-09-07 10:50:10,838 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:50:10,838 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-09-07 10:50:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 10:50:10,839 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:10,840 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:10,840 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:10,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1514500421, now seen corresponding path program 3 times [2019-09-07 10:50:10,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:10,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:10,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:10,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:10,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:10,973 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:10,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:50:11,052 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-07 10:50:11,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:11,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:50:11,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:11,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:11,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 10:50:11,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:50:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:50:11,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:50:11,090 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 7 states. [2019-09-07 10:50:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:11,185 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2019-09-07 10:50:11,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:50:11,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-07 10:50:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:11,187 INFO L225 Difference]: With dead ends: 76 [2019-09-07 10:50:11,187 INFO L226 Difference]: Without dead ends: 63 [2019-09-07 10:50:11,187 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:50:11,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-07 10:50:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2019-09-07 10:50:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-07 10:50:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-09-07 10:50:11,194 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 27 [2019-09-07 10:50:11,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:11,195 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-09-07 10:50:11,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:50:11,195 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-09-07 10:50:11,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 10:50:11,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:11,197 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:11,197 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:11,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:11,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1351338358, now seen corresponding path program 4 times [2019-09-07 10:50:11,198 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:11,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:11,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:11,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:11,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:11,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:11,336 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:11,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:50:11,410 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:50:11,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:11,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:50:11,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:11,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:11,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 10:50:11,441 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:50:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:50:11,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:50:11,442 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 8 states. [2019-09-07 10:50:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:11,538 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2019-09-07 10:50:11,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:50:11,538 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-07 10:50:11,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:11,540 INFO L225 Difference]: With dead ends: 86 [2019-09-07 10:50:11,540 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 10:50:11,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:50:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 10:50:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2019-09-07 10:50:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 10:50:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-09-07 10:50:11,547 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 31 [2019-09-07 10:50:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:11,547 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-09-07 10:50:11,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:50:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-09-07 10:50:11,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 10:50:11,549 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:11,549 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:11,549 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1719348913, now seen corresponding path program 5 times [2019-09-07 10:50:11,550 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:11,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:11,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:11,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:11,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:11,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:11,641 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:50:11,656 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:12,083 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 10:50:12,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:12,085 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:50:12,088 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Stream closed [2019-09-07 10:50:12,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:12,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 10:50:12,120 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:50:12,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:50:12,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:50:12,121 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 9 states. [2019-09-07 10:50:12,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:12,231 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2019-09-07 10:50:12,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:50:12,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-09-07 10:50:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:12,235 INFO L225 Difference]: With dead ends: 96 [2019-09-07 10:50:12,235 INFO L226 Difference]: Without dead ends: 83 [2019-09-07 10:50:12,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:50:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-07 10:50:12,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2019-09-07 10:50:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 10:50:12,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-07 10:50:12,248 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 35 [2019-09-07 10:50:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:12,249 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-07 10:50:12,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:50:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-07 10:50:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-07 10:50:12,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:12,250 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:12,250 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:12,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2138013292, now seen corresponding path program 6 times [2019-09-07 10:50:12,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:12,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:12,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:12,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:12,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:12,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:12,379 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:50:12,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:13,001 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:50:13,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:13,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:50:13,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:13,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:13,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 10:50:13,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:50:13,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:50:13,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:50:13,050 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 10 states. [2019-09-07 10:50:13,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:13,152 INFO L93 Difference]: Finished difference Result 106 states and 141 transitions. [2019-09-07 10:50:13,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:50:13,153 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-07 10:50:13,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:13,155 INFO L225 Difference]: With dead ends: 106 [2019-09-07 10:50:13,155 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 10:50:13,155 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:50:13,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 10:50:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2019-09-07 10:50:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 10:50:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2019-09-07 10:50:13,163 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 39 [2019-09-07 10:50:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:13,163 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2019-09-07 10:50:13,163 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:50:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2019-09-07 10:50:13,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 10:50:13,164 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:13,165 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:13,165 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1643083943, now seen corresponding path program 7 times [2019-09-07 10:50:13,165 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:13,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:13,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:13,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:13,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:13,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:13,270 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:50:13,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:13,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:50:13,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:13,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:13,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 10:50:13,385 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:50:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:50:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:50:13,386 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 11 states. [2019-09-07 10:50:13,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:13,509 INFO L93 Difference]: Finished difference Result 116 states and 155 transitions. [2019-09-07 10:50:13,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:50:13,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2019-09-07 10:50:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:13,511 INFO L225 Difference]: With dead ends: 116 [2019-09-07 10:50:13,512 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 10:50:13,512 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:50:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 10:50:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2019-09-07 10:50:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 10:50:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2019-09-07 10:50:13,519 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 43 [2019-09-07 10:50:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:13,520 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2019-09-07 10:50:13,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:50:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2019-09-07 10:50:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 10:50:13,521 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:13,521 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:13,522 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:13,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1289626270, now seen corresponding path program 8 times [2019-09-07 10:50:13,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:13,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:13,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:13,523 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:50:13,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:13,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:13,633 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:13,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:50:13,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:50:13,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:13,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:50:13,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:50:13,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:13,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 10:50:13,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:50:13,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:50:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:50:13,754 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 12 states. [2019-09-07 10:50:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:13,924 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2019-09-07 10:50:13,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:50:13,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-09-07 10:50:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:13,926 INFO L225 Difference]: With dead ends: 126 [2019-09-07 10:50:13,926 INFO L226 Difference]: Without dead ends: 113 [2019-09-07 10:50:13,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:50:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-07 10:50:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 56. [2019-09-07 10:50:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-07 10:50:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2019-09-07 10:50:13,944 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 47 [2019-09-07 10:50:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:13,945 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2019-09-07 10:50:13,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:50:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2019-09-07 10:50:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-07 10:50:13,948 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:13,948 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:13,949 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1496486755, now seen corresponding path program 9 times [2019-09-07 10:50:13,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:13,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:13,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:13,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:13,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:14,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:14,126 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:50:14,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:17,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-07 10:50:17,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:17,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 10:50:17,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:50:17,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:17,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-07 10:50:17,926 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 10:50:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 10:50:17,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:50:17,927 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 13 states. [2019-09-07 10:50:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:18,072 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2019-09-07 10:50:18,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 10:50:18,072 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-09-07 10:50:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:18,074 INFO L225 Difference]: With dead ends: 136 [2019-09-07 10:50:18,074 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 10:50:18,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 10:50:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 10:50:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 60. [2019-09-07 10:50:18,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-07 10:50:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-09-07 10:50:18,084 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 51 [2019-09-07 10:50:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:18,084 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-09-07 10:50:18,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 10:50:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-09-07 10:50:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-07 10:50:18,086 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:18,086 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:18,086 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:18,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1353128360, now seen corresponding path program 10 times [2019-09-07 10:50:18,087 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:18,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:18,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:18,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:18,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:18,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:18,315 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:50:18,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:50:19,776 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:50:19,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:50:19,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:50:19,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:50:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:19,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:50:19,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 10:50:19,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:50:19,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:50:19,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:50:19,817 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 14 states. [2019-09-07 10:50:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:50:19,987 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2019-09-07 10:50:19,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:50:19,988 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2019-09-07 10:50:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:50:19,989 INFO L225 Difference]: With dead ends: 146 [2019-09-07 10:50:19,989 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 10:50:19,990 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:50:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 10:50:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 64. [2019-09-07 10:50:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 10:50:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2019-09-07 10:50:20,006 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 55 [2019-09-07 10:50:20,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:50:20,007 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2019-09-07 10:50:20,007 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:50:20,007 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2019-09-07 10:50:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 10:50:20,008 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:50:20,008 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:50:20,009 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:50:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:50:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash 768281235, now seen corresponding path program 11 times [2019-09-07 10:50:20,009 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:50:20,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:50:20,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:20,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:50:20,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:50:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:50:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:50:20,182 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:50:20,182 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:50:20,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:10,105 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-07 10:51:10,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:10,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:51:10,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:10,161 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:10,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:10,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 10:51:10,178 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:51:10,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:51:10,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:51:10,178 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 15 states. [2019-09-07 10:51:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:10,340 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2019-09-07 10:51:10,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:51:10,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2019-09-07 10:51:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:10,342 INFO L225 Difference]: With dead ends: 156 [2019-09-07 10:51:10,342 INFO L226 Difference]: Without dead ends: 143 [2019-09-07 10:51:10,342 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:51:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-09-07 10:51:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2019-09-07 10:51:10,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 10:51:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2019-09-07 10:51:10,349 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 59 [2019-09-07 10:51:10,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:10,349 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2019-09-07 10:51:10,350 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:51:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2019-09-07 10:51:10,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 10:51:10,351 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:10,351 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:10,351 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash 566925646, now seen corresponding path program 12 times [2019-09-07 10:51:10,351 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:10,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:10,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:10,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:10,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:10,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:10,565 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:51:10,592 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:40,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:51:40,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:40,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:51:40,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:40,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:40,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 10:51:40,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:51:40,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:51:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:51:40,074 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 16 states. [2019-09-07 10:51:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:40,248 INFO L93 Difference]: Finished difference Result 166 states and 225 transitions. [2019-09-07 10:51:40,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:51:40,249 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-09-07 10:51:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:40,251 INFO L225 Difference]: With dead ends: 166 [2019-09-07 10:51:40,251 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 10:51:40,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:51:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 10:51:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 72. [2019-09-07 10:51:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 10:51:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2019-09-07 10:51:40,257 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 63 [2019-09-07 10:51:40,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:40,258 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2019-09-07 10:51:40,258 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:51:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2019-09-07 10:51:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 10:51:40,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:40,259 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:40,259 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash -643935607, now seen corresponding path program 13 times [2019-09-07 10:51:40,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:40,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:40,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:40,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:40,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:40,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:40,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:40,535 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:40,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:51:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:40,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:51:40,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:51:40,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:40,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:51:40,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:51:40,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:51:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:51:40,643 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 17 states. [2019-09-07 10:51:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:40,817 INFO L93 Difference]: Finished difference Result 176 states and 239 transitions. [2019-09-07 10:51:40,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:51:40,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2019-09-07 10:51:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:40,819 INFO L225 Difference]: With dead ends: 176 [2019-09-07 10:51:40,820 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 10:51:40,820 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:51:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 10:51:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2019-09-07 10:51:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 10:51:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2019-09-07 10:51:40,826 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 67 [2019-09-07 10:51:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:40,827 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2019-09-07 10:51:40,827 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:51:40,827 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2019-09-07 10:51:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 10:51:40,828 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:40,828 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:40,828 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1574111676, now seen corresponding path program 14 times [2019-09-07 10:51:40,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:40,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:40,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:40,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:51:40,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:40,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:40,997 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:41,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:51:41,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:51:41,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:51:41,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:51:41,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:51:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:41,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:51:41,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:51:41,131 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:51:41,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:51:41,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:51:41,132 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 18 states. [2019-09-07 10:51:41,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:51:41,331 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2019-09-07 10:51:41,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:51:41,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2019-09-07 10:51:41,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:51:41,332 INFO L225 Difference]: With dead ends: 186 [2019-09-07 10:51:41,333 INFO L226 Difference]: Without dead ends: 173 [2019-09-07 10:51:41,333 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:51:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-07 10:51:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2019-09-07 10:51:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-07 10:51:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2019-09-07 10:51:41,339 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 71 [2019-09-07 10:51:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:51:41,339 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2019-09-07 10:51:41,339 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:51:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2019-09-07 10:51:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 10:51:41,340 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:51:41,340 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:51:41,341 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:51:41,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:51:41,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1996309631, now seen corresponding path program 15 times [2019-09-07 10:51:41,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:51:41,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:51:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:41,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:51:41,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:51:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:51:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:51:41,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:51:41,554 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:51:41,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:52:40,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 10:52:40,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:52:40,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 10:52:40,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:52:40,803 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:52:40,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:52:40,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 10:52:40,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 10:52:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 10:52:40,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:52:40,820 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 19 states. [2019-09-07 10:52:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:52:41,183 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2019-09-07 10:52:41,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 10:52:41,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 75 [2019-09-07 10:52:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:52:41,185 INFO L225 Difference]: With dead ends: 196 [2019-09-07 10:52:41,185 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 10:52:41,186 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 10:52:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 10:52:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 84. [2019-09-07 10:52:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-07 10:52:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2019-09-07 10:52:41,194 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 75 [2019-09-07 10:52:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:52:41,194 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2019-09-07 10:52:41,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 10:52:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2019-09-07 10:52:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-07 10:52:41,195 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:52:41,195 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:52:41,195 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:52:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:52:41,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1305084614, now seen corresponding path program 16 times [2019-09-07 10:52:41,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:52:41,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:52:41,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:52:41,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:52:41,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:52:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:52:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:52:41,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:52:41,481 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:52:41,497 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:52:47,726 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:52:47,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:52:47,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:52:47,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:52:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:52:47,770 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:52:47,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:52:47,771 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:52:47,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:52:47,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:52:47,772 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 20 states. [2019-09-07 10:52:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:52:48,012 INFO L93 Difference]: Finished difference Result 206 states and 281 transitions. [2019-09-07 10:52:48,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:52:48,012 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-09-07 10:52:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:52:48,014 INFO L225 Difference]: With dead ends: 206 [2019-09-07 10:52:48,014 INFO L226 Difference]: Without dead ends: 193 [2019-09-07 10:52:48,015 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:52:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-09-07 10:52:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 88. [2019-09-07 10:52:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 10:52:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2019-09-07 10:52:48,020 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 79 [2019-09-07 10:52:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:52:48,020 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2019-09-07 10:52:48,020 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:52:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2019-09-07 10:52:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 10:52:48,021 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:52:48,021 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:52:48,022 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:52:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:52:48,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1130504075, now seen corresponding path program 17 times [2019-09-07 10:52:48,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:52:48,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:52:48,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:52:48,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:52:48,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:52:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:52:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:52:48,253 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:52:48,254 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:52:48,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:54:48,424 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 10:54:48,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:54:48,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:54:48,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:54:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:48,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:54:48,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:54:48,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:54:48,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:54:48,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:54:48,534 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand 21 states. [2019-09-07 10:54:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:54:48,827 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2019-09-07 10:54:48,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:54:48,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 83 [2019-09-07 10:54:48,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:54:48,829 INFO L225 Difference]: With dead ends: 216 [2019-09-07 10:54:48,829 INFO L226 Difference]: Without dead ends: 203 [2019-09-07 10:54:48,830 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:54:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-09-07 10:54:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 92. [2019-09-07 10:54:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 10:54:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2019-09-07 10:54:48,835 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 83 [2019-09-07 10:54:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:54:48,836 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2019-09-07 10:54:48,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:54:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2019-09-07 10:54:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 10:54:48,837 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:54:48,837 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:54:48,837 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:54:48,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:54:48,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1113870800, now seen corresponding path program 18 times [2019-09-07 10:54:48,838 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:54:48,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:54:48,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:48,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:54:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:54:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:54:49,290 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:54:49,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:54:49,291 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:54:49,317 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:56:36,218 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 10:56:36,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:56:36,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 10:56:36,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:36,327 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:36,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 10:56:36,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:56:36,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:56:36,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:56:36,328 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand 22 states. [2019-09-07 10:56:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:36,553 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2019-09-07 10:56:36,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:56:36,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 87 [2019-09-07 10:56:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:36,556 INFO L225 Difference]: With dead ends: 226 [2019-09-07 10:56:36,556 INFO L226 Difference]: Without dead ends: 213 [2019-09-07 10:56:36,556 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:56:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-09-07 10:56:36,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 96. [2019-09-07 10:56:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 10:56:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2019-09-07 10:56:36,562 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 87 [2019-09-07 10:56:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:36,562 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2019-09-07 10:56:36,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:56:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2019-09-07 10:56:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 10:56:36,563 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:36,563 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:36,563 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:36,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1261839979, now seen corresponding path program 19 times [2019-09-07 10:56:36,564 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:36,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:36,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:36,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:56:36,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:36,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:36,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:56:36,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:56:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:36,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:56:36,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:36,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:36,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:56:36,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:56:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:56:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:56:36,968 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 23 states. [2019-09-07 10:56:37,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:37,232 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2019-09-07 10:56:37,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:56:37,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2019-09-07 10:56:37,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:37,240 INFO L225 Difference]: With dead ends: 236 [2019-09-07 10:56:37,240 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 10:56:37,240 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:56:37,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 10:56:37,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 100. [2019-09-07 10:56:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 10:56:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2019-09-07 10:56:37,247 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 91 [2019-09-07 10:56:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:37,248 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2019-09-07 10:56:37,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:56:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2019-09-07 10:56:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 10:56:37,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:37,249 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:37,250 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash 437520678, now seen corresponding path program 20 times [2019-09-07 10:56:37,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:37,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:37,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:37,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:56:37,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:37,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:37,692 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:56:37,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:56:37,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:56:37,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:56:37,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:56:37,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:56:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:37,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:56:37,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:56:37,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:56:37,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:56:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:56:37,839 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 24 states. [2019-09-07 10:56:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:56:38,171 INFO L93 Difference]: Finished difference Result 246 states and 337 transitions. [2019-09-07 10:56:38,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:56:38,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 95 [2019-09-07 10:56:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:56:38,176 INFO L225 Difference]: With dead ends: 246 [2019-09-07 10:56:38,176 INFO L226 Difference]: Without dead ends: 233 [2019-09-07 10:56:38,177 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:56:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-09-07 10:56:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 104. [2019-09-07 10:56:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 10:56:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2019-09-07 10:56:38,190 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 95 [2019-09-07 10:56:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:56:38,190 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2019-09-07 10:56:38,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:56:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2019-09-07 10:56:38,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 10:56:38,192 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:56:38,193 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:56:38,193 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:56:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:56:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1384376735, now seen corresponding path program 21 times [2019-09-07 10:56:38,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:56:38,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:56:38,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:38,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:56:38,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:56:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:56:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:56:38,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:56:38,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:56:38,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:58:43,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 10:58:43,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:58:43,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 10:58:43,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:43,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:43,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 10:58:43,658 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:58:43,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:58:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:58:43,660 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand 25 states. [2019-09-07 10:58:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:44,003 INFO L93 Difference]: Finished difference Result 256 states and 351 transitions. [2019-09-07 10:58:44,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:58:44,003 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 99 [2019-09-07 10:58:44,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:44,005 INFO L225 Difference]: With dead ends: 256 [2019-09-07 10:58:44,005 INFO L226 Difference]: Without dead ends: 243 [2019-09-07 10:58:44,005 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:58:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-09-07 10:58:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 108. [2019-09-07 10:58:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-07 10:58:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2019-09-07 10:58:44,011 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 99 [2019-09-07 10:58:44,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:44,012 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2019-09-07 10:58:44,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:58:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2019-09-07 10:58:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-07 10:58:44,013 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:44,013 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:44,013 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash 123014684, now seen corresponding path program 22 times [2019-09-07 10:58:44,014 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:44,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:44,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:44,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:58:44,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:44,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:44,438 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:58:44,451 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:58:56,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:58:56,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:58:56,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:58:56,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:58:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:56,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:58:56,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 10:58:56,616 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:58:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:58:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:58:56,617 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand 26 states. [2019-09-07 10:58:56,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:58:56,902 INFO L93 Difference]: Finished difference Result 266 states and 365 transitions. [2019-09-07 10:58:56,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:58:56,902 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 103 [2019-09-07 10:58:56,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:58:56,904 INFO L225 Difference]: With dead ends: 266 [2019-09-07 10:58:56,905 INFO L226 Difference]: Without dead ends: 253 [2019-09-07 10:58:56,905 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:58:56,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-09-07 10:58:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 112. [2019-09-07 10:58:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-07 10:58:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2019-09-07 10:58:56,911 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 103 [2019-09-07 10:58:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:58:56,912 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2019-09-07 10:58:56,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:58:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2019-09-07 10:58:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 10:58:56,913 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:58:56,913 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:58:56,913 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:58:56,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:58:56,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1478864983, now seen corresponding path program 23 times [2019-09-07 10:58:56,914 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:58:56,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:58:56,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:56,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:58:56,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:58:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:58:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:58:57,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:58:57,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:58:57,368 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:02:07,345 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-07 11:02:07,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:02:07,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 11:02:07,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:02:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:07,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:02:07,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 11:02:07,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 11:02:07,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 11:02:07,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:02:07,477 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand 27 states. [2019-09-07 11:02:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:02:07,934 INFO L93 Difference]: Finished difference Result 276 states and 379 transitions. [2019-09-07 11:02:07,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:02:07,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 107 [2019-09-07 11:02:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:02:07,936 INFO L225 Difference]: With dead ends: 276 [2019-09-07 11:02:07,936 INFO L226 Difference]: Without dead ends: 263 [2019-09-07 11:02:07,937 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:02:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2019-09-07 11:02:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 116. [2019-09-07 11:02:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 11:02:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2019-09-07 11:02:07,943 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 107 [2019-09-07 11:02:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:02:07,944 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2019-09-07 11:02:07,944 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 11:02:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2019-09-07 11:02:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-09-07 11:02:07,945 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:02:07,945 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:02:07,945 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:02:07,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:02:07,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1357595374, now seen corresponding path program 24 times [2019-09-07 11:02:07,946 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:02:07,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:02:07,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:07,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:02:07,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:02:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:02:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 11:02:08,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:02:08,349 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:02:08,377 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000